MASTER Net MASTER Database: GRB210905.01 page

Please use the reference to MASTER DataBase as Lipunov et al., 2010, MASTER Robotic Net, Advances in Astronomy, vol. 2010, p.30L

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GRB coord: ErrorBox (deg): Sys Error (deg):
Sattel : Trigger: Notice:
GRB_Name: trignum: Nights after: FullSky


Name SWIFT GRB210905.01
Trignum 1071993
Trigger time 2021-09-05 00:12:41.32
Notice time 2021-09-05 00:21:21.591198
Coord, eb (20h 36m 14.81s , -44d 25m 50.9s) , 0.05
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

MASTER observatories and transients from them in error-field
Kislovodsk Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Amur Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tunka Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAFA Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
IAC Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
SAAO Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tavrida Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAGH Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2601134 2024-09-14 14:12:16.098349 20h 36m 14.88s -44d 25m 51.6s SWIFT 0.05 retraction 1071993 1 4044 retraction
1709899 2021-09-05 00:23:42.260535 20h 36m 11.04s -44d 26m 20.4s SWIFT 0 alert 1071993 1 78 alert
1709898 2021-09-05 00:23:34.854892 20h 36m 11.04s -44d 26m 20.4s SWIFT 0.0015 alert 1071993 1 69 alert
1709908 2021-09-05 00:34:08.6912 20h 36m 11.54s -44d 26m 22.2s SWIFT 0.0019 alert 1071993 2 67 alert
1709894 2021-09-05 00:23:23.457235 20h 36m 14.88s -44d 25m 51.6s SWIFT 0.05 alert 1071993 1 61 alert

DAYS:

MASTER optical transients in this field
Will be published in GCN, ATEL

Synchronous WFC images
Distance datetime coord2000 observatory camera links
72.2 2021-09-05 00:12:37.177 14h 07m 06.00s -32d 59m 17.0s OAFA 29008 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-09-05 00:12:41 (JD 2459462.508808)

Siderial time 1.674773 h

Ra 20:36:14.81 Dec -44:25:50.90
(309.061708d, -44.430806d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -78.82 Azimuth: 116.37

Sun: Altitude: 30.70 Azimuth: 299.75

Moon: Altitude: 53.60 Azimuth: 316.11

Tunka

Object: Altitude: -63.61 Azimuth: 90.83

Sun: Altitude: 15.80 Azimuth: 279.05

Moon: Altitude: 39.92 Azimuth: 289.46

Kislovodsk

Object: Altitude: -23.77 Azimuth: 50.41

Sun: Altitude: -24.35 Azimuth: 231.96

Moon: Altitude: -0.17 Azimuth: 241.16

Tavrida

Object: Altitude: -19.86 Azimuth: 46.38

Sun: Altitude: -28.21 Azimuth: 223.63

Moon: Altitude: -4.83 Azimuth: 235.04

SAAO

Object: Altitude: 43.10 Azimuth: 57.19

Sun: Altitude: -55.79 Azimuth: 312.76

Moon: Altitude: -46.27 Azimuth: 273.98

IAC

Object: Altitude: 14.56 Azimuth: 16.00

Sun: Altitude: -52.69 Azimuth: 158.81

Moon: Altitude: -40.48 Azimuth: 192.36

Argentina

Object: Altitude: 62.84 Azimuth: 306.58

Sun: Altitude: -24.36 Azimuth: 82.81

Moon: Altitude: -50.12 Azimuth: 83.90

Mexico

Object: Altitude: -9.87 Azimuth: 316.44

Sun: Altitude: 17.79 Azimuth: 87.39

Moon: Altitude: 5.34 Azimuth: 110.48

Ural

Object: Altitude: -39.89 Azimuth: 67.17

Sun: Altitude: -8.14 Azimuth: 243.62

Moon: Altitude: 14.80 Azimuth: 255.46

Vostryakovo

Object: Altitude: -28.66 Azimuth: 52.23

Sun: Altitude: -18.83 Azimuth: 224.10

Moon: Altitude: 3.10 Azimuth: 237.85

Gal. latitude: -37.454212 Gal. longitude: 356.402206

Dist. to Sun: 131.857926

Dist. to Moon: 153.885128

Moon coord.: (140.996345 d, 20.269019 d)

Sun coord.: (163.744765 d, 6.920833 d)

Lunar disk: 0.049894

Lunar phase: 154.185932

Lunar bright limb: 117.997336

No SN in this field

2021-09-05 00:21:21 (JD 2459462.514826)

Siderial time 1.819613 h

Ra 20:36:14.81 Dec -44:25:50.90
(309.061708d, -44.430806d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -80.04 Azimuth: 121.64

Sun: Altitude: 31.89 Azimuth: 301.85

Moon: Altitude: 54.48 Azimuth: 319.10

Tunka

Object: Altitude: -64.95 Azimuth: 92.63

Sun: Altitude: 17.12 Azimuth: 280.82

Moon: Altitude: 41.12 Azimuth: 291.51

Kislovodsk

Object: Altitude: -24.99 Azimuth: 51.46

Sun: Altitude: -23.10 Azimuth: 233.87

Moon: Altitude: 1.15 Azimuth: 242.61

Tavrida

Object: Altitude: -20.99 Azimuth: 47.52

Sun: Altitude: -27.13 Azimuth: 225.73

Moon: Altitude: -3.61 Azimuth: 236.59

SAAO

Object: Altitude: 41.56 Azimuth: 56.93

Sun: Altitude: -54.41 Azimuth: 309.87

Moon: Altitude: -44.50 Azimuth: 272.79

IAC

Object: Altitude: 14.01 Azimuth: 17.49

Sun: Altitude: -53.33 Azimuth: 162.22

Moon: Altitude: -40.07 Azimuth: 194.88

Argentina

Object: Altitude: 64.31 Azimuth: 307.67

Sun: Altitude: -26.18 Azimuth: 81.55

Moon: Altitude: -51.87 Azimuth: 82.50

Mexico

Object: Altitude: -8.60 Azimuth: 317.34

Sun: Altitude: 15.93 Azimuth: 88.53

Moon: Altitude: 3.65 Azimuth: 111.49

Ural

Object: Altitude: -40.98 Azimuth: 68.61

Sun: Altitude: -7.08 Azimuth: 245.51

Moon: Altitude: 15.89 Azimuth: 257.15

Vostryakovo

Object: Altitude: -29.65 Azimuth: 53.61

Sun: Altitude: -17.96 Azimuth: 226.17

Moon: Altitude: 4.10 Azimuth: 239.54

Gal. latitude: -37.454212 Gal. longitude: 356.402206

Dist. to Sun: 131.853113

Dist. to Moon: 153.838643

Moon coord.: (141.076872 d, 20.246638 d)

Sun coord.: (163.750200 d, 6.918603 d)

Lunar disk: 0.049622

Lunar phase: 154.257572

Lunar bright limb: 118.055322

No SN in this field

2021-09-05 01:21:21 (JD 2459462.556493)

Siderial time 2.822351 h

Ra 20:36:14.81 Dec -44:25:50.90
(309.061708d, -44.430806d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -83.74 Azimuth: 201.02

Sun: Altitude: 39.23 Azimuth: 317.83

Moon: Altitude: 58.86 Azimuth: 342.68

Tunka

Object: Altitude: -74.07 Azimuth: 109.18

Sun: Altitude: 25.95 Azimuth: 293.74

Moon: Altitude: 48.78 Azimuth: 307.45

Kislovodsk

Object: Altitude: -33.88 Azimuth: 58.36

Sun: Altitude: -13.73 Azimuth: 246.10

Moon: Altitude: 10.69 Azimuth: 252.35

Tavrida

Object: Altitude: -29.33 Azimuth: 54.99

Sun: Altitude: -18.69 Azimuth: 239.09

Moon: Altitude: 5.32 Azimuth: 246.84

SAAO

Object: Altitude: 31.07 Azimuth: 54.15

Sun: Altitude: -43.63 Azimuth: 294.07

Moon: Altitude: -32.21 Azimuth: 265.34

IAC

Object: Altitude: 8.96 Azimuth: 27.15

Sun: Altitude: -54.54 Azimuth: 187.58

Moon: Altitude: -35.22 Azimuth: 210.95

Argentina

Object: Altitude: 73.46 Azimuth: 323.64

Sun: Altitude: -38.57 Azimuth: 71.72

Moon: Altitude: -63.75 Azimuth: 69.90

Mexico

Object: Altitude: -0.45 Azimuth: 324.34

Sun: Altitude: 3.09 Azimuth: 96.20

Moon: Altitude: -7.66 Azimuth: 119.05

Ural

Object: Altitude: -48.83 Azimuth: 78.98

Sun: Altitude: 0.65 Azimuth: 258.27

Moon: Altitude: 23.57 Azimuth: 269.08

Vostryakovo

Object: Altitude: -36.91 Azimuth: 63.06

Sun: Altitude: -11.17 Azimuth: 239.88

Moon: Altitude: 11.43 Azimuth: 251.10

Gal. latitude: -37.454212 Gal. longitude: 356.402206

Dist. to Sun: 131.819792

Dist. to Moon: 153.512723

Moon coord.: (141.634073 d, 20.090591 d)

Sun coord.: (163.787824 d, 6.903163 d)

Lunar disk: 0.047759

Lunar phase: 154.753660

Lunar bright limb: 118.460850

No SN in this field

2024-10-04 12:37:31 (JD 2460588.026053)

Siderial time 16.046203 h

Ra 20:36:14.81 Dec -44:25:50.90
(309.061708d, -44.430806d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -6.58 Azimuth: 15.27

Sun: Altitude: -33.27 Azimuth: 130.03

Moon: Altitude: -31.35 Azimuth: 107.68

Tunka

Object: Altitude: -6.27 Azimuth: 357.90

Sun: Altitude: -19.18 Azimuth: 107.89

Moon: Altitude: -16.02 Azimuth: 88.28

Kislovodsk

Object: Altitude: -14.69 Azimuth: 318.67

Sun: Altitude: 20.96 Azimuth: 61.08

Moon: Altitude: 22.91 Azimuth: 40.75

Tavrida

Object: Altitude: -19.61 Azimuth: 313.88

Sun: Altitude: 25.55 Azimuth: 53.37

Moon: Altitude: 25.76 Azimuth: 32.33

SAAO

Object: Altitude: 25.19 Azimuth: 308.15

Sun: Altitude: 48.19 Azimuth: 124.67

Moon: Altitude: 65.90 Azimuth: 137.45

IAC

Object: Altitude: -42.04 Azimuth: 305.81

Sun: Altitude: 56.95 Azimuth: 352.76

Moon: Altitude: 43.52 Azimuth: 331.54

Argentina

Object: Altitude: -13.65 Azimuth: 356.56

Sun: Altitude: 30.39 Azimuth: 255.17

Moon: Altitude: 20.88 Azimuth: 273.39

Mexico

Object: Altitude: -58.61 Azimuth: 54.40

Sun: Altitude: -9.03 Azimuth: 269.86

Moon: Altitude: -27.97 Azimuth: 269.46

Ural

Object: Altitude: -18.64 Azimuth: 326.90

Sun: Altitude: 5.77 Azimuth: 72.45

Moon: Altitude: 6.00 Azimuth: 53.41

Vostryakovo

Object: Altitude: -25.17 Azimuth: 312.91

Sun: Altitude: 17.24 Azimuth: 53.50

Moon: Altitude: 15.50 Azimuth: 33.83

Gal. latitude: -37.454212 Gal. longitude: 356.402206

Dist. to Sun: 106.555114

Dist. to Moon: 88.630033

Moon coord.: (207.385163 d, -13.581447 d)

Sun coord.: (190.515480 d, -4.526013 d)

Lunar disk: 0.027195

Lunar phase: 161.015953

Lunar bright limb: 296.985964

No SN in this field
Recent coverage and limits telegrams

 #######################################################################################
#######################################################################################

  ID = 4934
TYPE = 35
DAYS = 1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210905A errorbox  155 sec after notice time and 563 sec after trigger time at 2021-09-05 00:22:05 UT, with upper limit up to  21.3 mag. The observations began at zenith distance = 26 deg. The sun  altitude  is -26.7 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709881

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     619 |         MASTER-OAFA |   C |   110 | 18.6 |        
     764 |         MASTER-OAFA |   C |   400 | 19.5 |  Coadd 
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     758 |         MASTER-OAFA |   C |   130 | 18.8 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        
     923 |         MASTER-OAFA |   C |   160 | 18.9 |        
    1003 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1112 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1292 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    4262 |         MASTER-OAFA |   C |  6480 | 21.3 |  Coadd 
    1204 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1312 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1403 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1583 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    1511 |         MASTER-OAFA |   C |   180 | 19.2 |        
    1603 |         MASTER-SAAO | P\  |   180 | 18.2 |        
    1711 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1891 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    1802 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1910 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2002 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2182 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2109 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2201 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    2309 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2489 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    2401 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2508 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2600 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2780 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2708 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2800 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2907 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3087 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    3000 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3107 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3199 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3379 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3306 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3399 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3506 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3686 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    3598 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    3705 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3798 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3978 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3905 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3997 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4104 |         MASTER-OAFA |   C |   180 | 19.2 |        
    4284 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    4197 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4305 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4396 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4576 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    4504 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4595 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4703 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4883 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    4795 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4903 |         MASTER-OAFA |   C |   180 | 19.4 |        
    4995 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5175 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5103 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5194 |         MASTER-SAAO | P\  |   180 | 17.6 |        
    5303 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5483 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5393 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    5502 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5593 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5773 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5702 |         MASTER-OAFA |   C |   180 | 19.3 |        
    5792 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    5901 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6081 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5992 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6100 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6191 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    6371 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6300 |         MASTER-OAFA |   C |   180 | 19.4 |        
    6391 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6499 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6679 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    6590 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    6699 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6789 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6969 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6898 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6989 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7098 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7278 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    7189 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7297 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7388 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7568 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    7497 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7587 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7696 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7876 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    7787 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7896 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7986 |         MASTER-SAAO | P\  |   180 | 17.3 |        
    8166 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    8095 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8186 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    8294 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8474 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    8385 |         MASTER-SAAO | P\  |   180 | 17.2 |        
    8494 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8585 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    8765 |         MASTER-SAAO | P\  |   540 | 17.7 |  Coadd 
    8693 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8784 |         MASTER-SAAO | P\  |   180 | 17.2 |        
    8893 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9073 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    8984 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    9092 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9183 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9363 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    9291 |         MASTER-OAFA |   C |   180 | 19.1 |        
    9383 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9491 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9671 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    9582 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    9690 |         MASTER-OAFA |   C |   180 | 19.2 |        
    9782 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9962 |         MASTER-SAAO | P\  |   540 | 17.5 |  Coadd 
    9889 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9981 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10089 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10269 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
   10181 |         MASTER-SAAO | P\  |   180 | 16.9 |        
   10288 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10380 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10560 |         MASTER-SAAO | P\  |   540 | 17.3 |  Coadd 
   10488 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10580 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10687 |         MASTER-OAFA |   C |   180 | 19.3 |        
   10867 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
   10779 |         MASTER-SAAO | P\  |   180 | 16.6 |        
   10887 |         MASTER-OAFA |   C |   180 | 19.3 |        
   10979 |         MASTER-SAAO | P\  |   180 | 16.6 |        
   11159 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
   11087 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11178 |         MASTER-SAAO | P\  |   180 | 15.6 |        
   11287 |         MASTER-OAFA |   C |   180 | 19.3 |        
   11467 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   11378 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   11486 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11578 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   11685 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11777 |         MASTER-SAAO | P\  |   180 | 16.3 |        
   11885 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12065 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   12085 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12176 |         MASTER-SAAO | P\  |   180 | 15.7 |        
   12285 |         MASTER-OAFA |   C |   180 | 19.1 |        
   12376 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   12484 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12664 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   12575 |         MASTER-SAAO | P\  |   180 | 15.7 |        
   12755 |         MASTER-SAAO | P\  |   540 | 15.6 |  Coadd 
   12684 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12774 |         MASTER-SAAO | P\  |   180 | 15.5 |        
   12883 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12974 |         MASTER-SAAO | P\  |   180 | 14.8 |        
   13083 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13263 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   13173 |         MASTER-SAAO | P\  |   180 | 14.8 |        
   13282 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13373 |         MASTER-SAAO | P\  |   180 | 14.3 |        
   13482 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13572 |         MASTER-SAAO | P\  |   180 | 13.6 |        
   13682 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13862 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   13881 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14081 |         MASTER-OAFA |   C |   180 | 19.2 |        
   14280 |         MASTER-OAFA |   C |   180 | 18.9 |        
   14460 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   14480 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14679 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14879 |         MASTER-OAFA |   C |   180 | 18.5 |        
   15059 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   15078 |         MASTER-OAFA |   C |   180 | 19.2 |        
   15278 |         MASTER-OAFA |   C |   180 | 19.2 |        
   15477 |         MASTER-OAFA |   C |   180 | 19.1 |        
   15657 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   15677 |         MASTER-OAFA |   C |   180 | 19.0 |        
   15876 |         MASTER-OAFA |   C |   180 | 19.0 |        
   16075 |         MASTER-OAFA |   C |   180 | 19.0 |        
   16255 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   16275 |         MASTER-OAFA |   C |   180 | 18.7 |        
   16474 |         MASTER-OAFA |   C |   180 | 18.0 |        
   16674 |         MASTER-OAFA |   C |   180 | 17.0 |        
   16854 |         MASTER-OAFA |   C |   540 | 18.5 |  Coadd 
   16873 |         MASTER-OAFA |   C |   180 | 17.6 |        
   17073 |         MASTER-OAFA |   C |   180 | 18.6 |        
   17272 |         MASTER-OAFA |   C |   180 | 19.1 |        
   17452 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   17471 |         MASTER-OAFA |   C |   180 | 19.0 |        
   17671 |         MASTER-OAFA |   C |   180 | 18.8 |        
   17870 |         MASTER-OAFA |   C |   180 | 19.0 |        
   18050 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   18070 |         MASTER-OAFA |   C |   180 | 19.2 |        
   18269 |         MASTER-OAFA |   C |   180 | 19.1 |        
   18469 |         MASTER-OAFA |   C |   180 | 19.0 |        
   18649 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   18669 |         MASTER-OAFA |   C |   180 | 18.8 |        
   18868 |         MASTER-OAFA |   C |   180 | 18.9 |        
   19068 |         MASTER-OAFA |   C |   180 | 18.8 |        
   19248 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   19267 |         MASTER-OAFA |   C |   180 | 18.6 |        
   19467 |         MASTER-OAFA |   C |   180 | 18.8 |        
   19666 |         MASTER-OAFA |   C |   180 | 18.9 |        
   19846 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   19866 |         MASTER-OAFA |   C |   180 | 19.0 |        
   20065 |         MASTER-OAFA |   C |   180 | 18.7 |        
   20265 |         MASTER-OAFA |   C |   180 | 19.0 |        
   20445 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   20464 |         MASTER-OAFA |   C |   180 | 18.7 |        
   20663 |         MASTER-OAFA |   C |   180 | 18.6 |        
   20863 |         MASTER-OAFA |   C |   180 | 18.6 |        
   21043 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   21063 |         MASTER-OAFA |   C |   180 | 18.8 |        
   21262 |         MASTER-OAFA |   C |   180 | 18.9 |        
   21462 |         MASTER-OAFA |   C |   180 | 18.8 |        
   21642 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   21662 |         MASTER-OAFA |   C |   180 | 18.7 |        
   21862 |         MASTER-OAFA |   C |   180 | 18.2 |        
   22061 |         MASTER-OAFA |   C |   180 | 18.7 |        
   22241 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   22260 |         MASTER-OAFA |   C |   180 | 18.9 |        
   22460 |         MASTER-OAFA |   C |   180 | 18.8 |        
   22660 |         MASTER-OAFA |   C |   180 | 18.9 |        
   22840 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   22859 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23059 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23258 |         MASTER-OAFA |   C |   180 | 18.7 |        
   23438 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   23457 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23657 |         MASTER-OAFA |   C |   180 | 18.0 |        
   23857 |         MASTER-OAFA |   C |   180 | 18.5 |        
   24037 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   24056 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24256 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24455 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24655 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24865 |         MASTER-OAFA |   C |   180 | 18.5 |        
   25045 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   25064 |         MASTER-OAFA |   C |   180 | 18.8 |        
   25263 |         MASTER-OAFA |   C |   180 | 18.7 |        
   25463 |         MASTER-OAFA |   C |   180 | 18.4 |        
   25643 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   25662 |         MASTER-OAFA |   C |   180 | 18.8 |        
   25862 |         MASTER-OAFA |   C |   180 | 19.0 |        
   26061 |         MASTER-OAFA |   C |   180 | 18.7 |        
   26241 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   26261 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26461 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26660 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26840 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   26860 |         MASTER-OAFA |   C |   180 | 18.8 |        
   27059 |         MASTER-OAFA |   C |   180 | 18.8 |        
   27259 |         MASTER-OAFA |   C |   180 | 18.7 |        
   27439 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   27458 |         MASTER-OAFA |   C |   180 | 18.7 |        
   27657 |         MASTER-OAFA |   C |   180 | 18.6 |        
   27857 |         MASTER-OAFA |   C |   180 | 18.7 |        
   28037 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   28057 |         MASTER-OAFA |   C |   180 | 18.6 |        
   28256 |         MASTER-OAFA |   C |   180 | 18.7 |        
   28456 |         MASTER-OAFA |   C |   180 | 18.5 |        
   28636 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   28656 |         MASTER-OAFA |   C |   180 | 18.6 |        
   28856 |         MASTER-OAFA |   C |   180 | 18.6 |        
   29055 |         MASTER-OAFA |   C |   180 | 18.5 |        
   29235 |         MASTER-OAFA |   C |   540 | 19.1 |  Coadd 
   29255 |         MASTER-OAFA |   C |   180 | 18.3 |        
   29454 |         MASTER-OAFA |   C |   180 | 18.5 |        
   29654 |         MASTER-OAFA |   C |   180 | 18.4 |        
   29834 |         MASTER-OAFA |   C |   540 | 19.1 |  Coadd 
   29853 |         MASTER-OAFA |   C |   180 | 18.4 |        
   30054 |         MASTER-OAFA |   C |   180 | 18.2 |        
   30253 |         MASTER-OAFA |   C |   180 | 18.2 |        
   30433 |         MASTER-OAFA |   C |   540 | 18.8 |  Coadd 
   30453 |         MASTER-OAFA |   C |   180 | 18.1 |        
   30652 |         MASTER-OAFA |   C |   180 | 18.0 |        
   30852 |         MASTER-OAFA |   C |   180 | 17.7 |        
   31032 |         MASTER-OAFA |   C |   540 | 18.4 |  Coadd 
   31051 |         MASTER-OAFA |   C |   180 | 17.6 |        
   31251 |         MASTER-OAFA |   C |   180 | 18.0 |        
   31450 |         MASTER-OAFA |   C |   180 | 18.1 |        
   31630 |         MASTER-OAFA |   C |   540 | 18.5 |  Coadd 
   31650 |         MASTER-OAFA |   C |   180 | 17.8 |        
   31849 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32049 |         MASTER-OAFA |   C |   180 | 17.5 |        
   32229 |         MASTER-OAFA |   C |   540 | 18.3 |  Coadd 
   32248 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32448 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32647 |         MASTER-OAFA |   C |   180 | 17.5 |        
   32847 |         MASTER-OAFA |   C |   180 | 17.4 |        
   33046 |         MASTER-OAFA |   C |   180 | 17.3 |        
   33246 |         MASTER-OAFA |   C |   180 | 17.4 |        
   33768 |         MASTER-OAFA |   C |   180 | 16.9 |        
   34286 |         MASTER-OAFA |   C |   180 | 16.5 |        
   34803 |         MASTER-OAFA |   C |   180 | 15.7 |        
   35322 |         MASTER-OAFA |   C |   180 | 14.5 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 4932
TYPE = 35
DAYS = 0.5


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210905A errorbox  155 sec after notice time and 563 sec after trigger time at 2021-09-05 00:22:05 UT, with upper limit up to  20.0 mag. The observations began at zenith distance = 26 deg. The sun  altitude  is -26.7 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709878

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     619 |         MASTER-OAFA |   C |   110 | 18.6 |        
     764 |         MASTER-OAFA |   C |   400 | 19.5 |  Coadd 
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     758 |         MASTER-OAFA |   C |   130 | 18.8 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        
     923 |         MASTER-OAFA |   C |   160 | 18.9 |        
    1003 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1112 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1292 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    1204 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1312 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1403 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1583 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    1511 |         MASTER-OAFA |   C |   180 | 19.2 |        
    1603 |         MASTER-SAAO | P\  |   180 | 18.2 |        
    1711 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1891 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    1802 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1910 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2002 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2182 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2109 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2201 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    2309 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2489 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    2401 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2508 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2600 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2780 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2708 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2800 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2907 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3087 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    3000 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3107 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3199 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3379 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3306 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3399 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3506 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3686 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    3598 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    3705 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3798 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3978 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3905 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3997 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4104 |         MASTER-OAFA |   C |   180 | 19.2 |        
    4284 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    4197 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4305 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4396 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4576 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    4504 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4595 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4703 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4883 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    4795 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4903 |         MASTER-OAFA |   C |   180 | 19.4 |        
    4995 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5175 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5103 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5194 |         MASTER-SAAO | P\  |   180 | 17.6 |        
    5303 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5483 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5393 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    5502 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5593 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5773 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5702 |         MASTER-OAFA |   C |   180 | 19.3 |        
    5792 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    5901 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6081 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5992 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6100 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6191 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    6371 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6300 |         MASTER-OAFA |   C |   180 | 19.4 |        
    6391 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6499 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6679 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    6590 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    6699 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6789 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6969 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6898 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6989 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7098 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7278 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    7189 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7297 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7388 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7568 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    7497 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7587 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7696 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7876 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    7787 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7896 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7986 |         MASTER-SAAO | P\  |   180 | 17.3 |        
    8166 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    8095 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8186 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    8294 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8474 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    8385 |         MASTER-SAAO | P\  |   180 | 17.2 |        
    8494 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8585 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    8765 |         MASTER-SAAO | P\  |   540 | 17.7 |  Coadd 
    8693 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8784 |         MASTER-SAAO | P\  |   180 | 17.2 |        
    8893 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9073 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    8984 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    9092 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9183 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9363 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    9291 |         MASTER-OAFA |   C |   180 | 19.1 |        
    9383 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9491 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9671 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    9582 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    9690 |         MASTER-OAFA |   C |   180 | 19.2 |        
    9782 |         MASTER-SAAO | P\  |   180 | 17.1 |        
    9962 |         MASTER-SAAO | P\  |   540 | 17.5 |  Coadd 
    9889 |         MASTER-OAFA |   C |   180 | 19.3 |        
    9981 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10089 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10269 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
   10181 |         MASTER-SAAO | P\  |   180 | 16.9 |        
   10288 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10380 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10560 |         MASTER-SAAO | P\  |   540 | 17.3 |  Coadd 
   10488 |         MASTER-OAFA |   C |   180 | 19.2 |        
   10580 |         MASTER-SAAO | P\  |   180 | 17.0 |        
   10687 |         MASTER-OAFA |   C |   180 | 19.3 |        
   10867 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
   10779 |         MASTER-SAAO | P\  |   180 | 16.6 |        
   10887 |         MASTER-OAFA |   C |   180 | 19.3 |        
   10979 |         MASTER-SAAO | P\  |   180 | 16.6 |        
   11159 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
   11087 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11178 |         MASTER-SAAO | P\  |   180 | 15.6 |        
   11287 |         MASTER-OAFA |   C |   180 | 19.3 |        
   11467 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   11378 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   11486 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11578 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   11685 |         MASTER-OAFA |   C |   180 | 19.2 |        
   11777 |         MASTER-SAAO | P\  |   180 | 16.3 |        
   11885 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12065 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   12085 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12176 |         MASTER-SAAO | P\  |   180 | 15.7 |        
   12285 |         MASTER-OAFA |   C |   180 | 19.1 |        
   12376 |         MASTER-SAAO | P\  |   180 | 15.8 |        
   12484 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12664 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   12575 |         MASTER-SAAO | P\  |   180 | 15.7 |        
   12755 |         MASTER-SAAO | P\  |   540 | 15.6 |  Coadd 
   12684 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12774 |         MASTER-SAAO | P\  |   180 | 15.5 |        
   12883 |         MASTER-OAFA |   C |   180 | 19.2 |        
   12974 |         MASTER-SAAO | P\  |   180 | 14.8 |        
   13083 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13263 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   13173 |         MASTER-SAAO | P\  |   180 | 14.8 |        
   13282 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13373 |         MASTER-SAAO | P\  |   180 | 14.3 |        
   13482 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13572 |         MASTER-SAAO | P\  |   180 | 13.6 |        
   13682 |         MASTER-OAFA |   C |   180 | 19.2 |        
   13862 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   13881 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14081 |         MASTER-OAFA |   C |   180 | 19.2 |        
   14280 |         MASTER-OAFA |   C |   180 | 18.9 |        
   14460 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   14480 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14679 |         MASTER-OAFA |   C |   180 | 19.0 |        
   14879 |         MASTER-OAFA |   C |   180 | 18.5 |        
   15059 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   15078 |         MASTER-OAFA |   C |   180 | 19.2 |        
   15278 |         MASTER-OAFA |   C |   180 | 19.2 |        
   15477 |         MASTER-OAFA |   C |   180 | 19.1 |        
   15657 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
   15677 |         MASTER-OAFA |   C |   180 | 19.0 |        
   15876 |         MASTER-OAFA |   C |   180 | 19.0 |        
   16075 |         MASTER-OAFA |   C |   180 | 19.0 |        
   16255 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   16275 |         MASTER-OAFA |   C |   180 | 18.7 |        
   16474 |         MASTER-OAFA |   C |   180 | 18.0 |        
   16674 |         MASTER-OAFA |   C |   180 | 17.0 |        
   16854 |         MASTER-OAFA |   C |   540 | 18.5 |  Coadd 
   16873 |         MASTER-OAFA |   C |   180 | 17.6 |        
   17073 |         MASTER-OAFA |   C |   180 | 18.6 |        
   17272 |         MASTER-OAFA |   C |   180 | 19.1 |        
   17452 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   17471 |         MASTER-OAFA |   C |   180 | 19.0 |        
   17671 |         MASTER-OAFA |   C |   180 | 18.8 |        
   17870 |         MASTER-OAFA |   C |   180 | 19.0 |        
   18050 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
   18070 |         MASTER-OAFA |   C |   180 | 19.2 |        
   18269 |         MASTER-OAFA |   C |   180 | 19.1 |        
   18469 |         MASTER-OAFA |   C |   180 | 19.0 |        
   18649 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   18669 |         MASTER-OAFA |   C |   180 | 18.8 |        
   18868 |         MASTER-OAFA |   C |   180 | 18.9 |        
   19068 |         MASTER-OAFA |   C |   180 | 18.8 |        
   19248 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   19267 |         MASTER-OAFA |   C |   180 | 18.6 |        
   19467 |         MASTER-OAFA |   C |   180 | 18.8 |        
   19666 |         MASTER-OAFA |   C |   180 | 18.9 |        
   19846 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   19866 |         MASTER-OAFA |   C |   180 | 19.0 |        
   20065 |         MASTER-OAFA |   C |   180 | 18.7 |        
   20265 |         MASTER-OAFA |   C |   180 | 19.0 |        
   20445 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   20464 |         MASTER-OAFA |   C |   180 | 18.7 |        
   20663 |         MASTER-OAFA |   C |   180 | 18.6 |        
   20863 |         MASTER-OAFA |   C |   180 | 18.6 |        
   21043 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   21063 |         MASTER-OAFA |   C |   180 | 18.8 |        
   21262 |         MASTER-OAFA |   C |   180 | 18.9 |        
   21462 |         MASTER-OAFA |   C |   180 | 18.8 |        
   21642 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   21662 |         MASTER-OAFA |   C |   180 | 18.7 |        
   21862 |         MASTER-OAFA |   C |   180 | 18.2 |        
   22061 |         MASTER-OAFA |   C |   180 | 18.7 |        
   22241 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   22260 |         MASTER-OAFA |   C |   180 | 18.9 |        
   22460 |         MASTER-OAFA |   C |   180 | 18.8 |        
   22660 |         MASTER-OAFA |   C |   180 | 18.9 |        
   22840 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   22859 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23059 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23258 |         MASTER-OAFA |   C |   180 | 18.7 |        
   23438 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   23457 |         MASTER-OAFA |   C |   180 | 18.8 |        
   23657 |         MASTER-OAFA |   C |   180 | 18.0 |        
   23857 |         MASTER-OAFA |   C |   180 | 18.5 |        
   24037 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
   24056 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24256 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24455 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24655 |         MASTER-OAFA |   C |   180 | 18.7 |        
   24865 |         MASTER-OAFA |   C |   180 | 18.5 |        
   25045 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   25064 |         MASTER-OAFA |   C |   180 | 18.8 |        
   25263 |         MASTER-OAFA |   C |   180 | 18.7 |        
   25463 |         MASTER-OAFA |   C |   180 | 18.4 |        
   25643 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   25662 |         MASTER-OAFA |   C |   180 | 18.8 |        
   25862 |         MASTER-OAFA |   C |   180 | 19.0 |        
   26061 |         MASTER-OAFA |   C |   180 | 18.7 |        
   26241 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
   26261 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26461 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26660 |         MASTER-OAFA |   C |   180 | 18.8 |        
   26840 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
   26860 |         MASTER-OAFA |   C |   180 | 18.8 |        
   27059 |         MASTER-OAFA |   C |   180 | 18.8 |        
   27259 |         MASTER-OAFA |   C |   180 | 18.7 |        
   27439 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   27458 |         MASTER-OAFA |   C |   180 | 18.7 |        
   27657 |         MASTER-OAFA |   C |   180 | 18.6 |        
   27857 |         MASTER-OAFA |   C |   180 | 18.7 |        
   28037 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   28057 |         MASTER-OAFA |   C |   180 | 18.6 |        
   28256 |         MASTER-OAFA |   C |   180 | 18.7 |        
   28456 |         MASTER-OAFA |   C |   180 | 18.5 |        
   28636 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
   28656 |         MASTER-OAFA |   C |   180 | 18.6 |        
   28856 |         MASTER-OAFA |   C |   180 | 18.6 |        
   29055 |         MASTER-OAFA |   C |   180 | 18.5 |        
   29235 |         MASTER-OAFA |   C |   540 | 19.1 |  Coadd 
   29255 |         MASTER-OAFA |   C |   180 | 18.3 |        
   29454 |         MASTER-OAFA |   C |   180 | 18.5 |        
   29654 |         MASTER-OAFA |   C |   180 | 18.4 |        
   29834 |         MASTER-OAFA |   C |   540 | 19.1 |  Coadd 
   29853 |         MASTER-OAFA |   C |   180 | 18.4 |        
   30054 |         MASTER-OAFA |   C |   180 | 18.2 |        
   30253 |         MASTER-OAFA |   C |   180 | 18.2 |        
   30433 |         MASTER-OAFA |   C |   540 | 18.8 |  Coadd 
   30453 |         MASTER-OAFA |   C |   180 | 18.1 |        
   30652 |         MASTER-OAFA |   C |   180 | 18.0 |        
   30852 |         MASTER-OAFA |   C |   180 | 17.7 |        
   31032 |         MASTER-OAFA |   C |   540 | 18.4 |  Coadd 
   31051 |         MASTER-OAFA |   C |   180 | 17.6 |        
   31251 |         MASTER-OAFA |   C |   180 | 18.0 |        
   31450 |         MASTER-OAFA |   C |   180 | 18.1 |        
   31630 |         MASTER-OAFA |   C |   540 | 18.5 |  Coadd 
   31650 |         MASTER-OAFA |   C |   180 | 17.8 |        
   31849 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32049 |         MASTER-OAFA |   C |   180 | 17.5 |        
   32229 |         MASTER-OAFA |   C |   540 | 18.3 |  Coadd 
   32248 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32448 |         MASTER-OAFA |   C |   180 | 17.7 |        
   32647 |         MASTER-OAFA |   C |   180 | 17.5 |        
   32847 |         MASTER-OAFA |   C |   180 | 17.4 |        
   33046 |         MASTER-OAFA |   C |   180 | 17.3 |        
   33246 |         MASTER-OAFA |   C |   180 | 17.4 |        
   33768 |         MASTER-OAFA |   C |   180 | 16.9 |        
   34286 |         MASTER-OAFA |   C |   180 | 16.5 |        
   34803 |         MASTER-OAFA |   C |   180 | 15.7 |        
   35322 |         MASTER-OAFA |   C |   180 | 14.5 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 4931
TYPE = 35
DAYS = 0.1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210905A errorbox  155 sec after notice time and 563 sec after trigger time at 2021-09-05 00:22:05 UT, with upper limit up to  20.0 mag. The observations began at zenith distance = 26 deg. The sun  altitude  is -26.7 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709878

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     619 |         MASTER-OAFA |   C |   110 | 18.6 |        
     764 |         MASTER-OAFA |   C |   400 | 19.5 |  Coadd 
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     758 |         MASTER-OAFA |   C |   130 | 18.8 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        
     923 |         MASTER-OAFA |   C |   160 | 18.9 |        
    1003 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1112 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1292 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    1204 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    1312 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1403 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1583 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    1511 |         MASTER-OAFA |   C |   180 | 19.2 |        
    1603 |         MASTER-SAAO | P\  |   180 | 18.2 |        
    1711 |         MASTER-OAFA |   C |   180 | 19.1 |        
    1891 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    1802 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    1910 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2002 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2182 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2109 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2201 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    2309 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2489 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    2401 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2508 |         MASTER-OAFA |   C |   180 | 19.3 |        
    2600 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    2780 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    2708 |         MASTER-OAFA |   C |   180 | 19.2 |        
    2800 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    2907 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3087 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    3000 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3107 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3199 |         MASTER-SAAO | P\  |   180 | 18.0 |        
    3379 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3306 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3399 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3506 |         MASTER-OAFA |   C |   180 | 19.3 |        
    3686 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    3598 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    3705 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3798 |         MASTER-SAAO | P\  |   180 | 17.9 |        
    3978 |         MASTER-SAAO | P\  |   540 | 18.4 |  Coadd 
    3905 |         MASTER-OAFA |   C |   180 | 19.2 |        
    3997 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4104 |         MASTER-OAFA |   C |   180 | 19.2 |        
    4284 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    4197 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4305 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4396 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    4576 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    4504 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4595 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4703 |         MASTER-OAFA |   C |   180 | 19.3 |        
    4883 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    4795 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    4903 |         MASTER-OAFA |   C |   180 | 19.4 |        
    4995 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5175 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5103 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5194 |         MASTER-SAAO | P\  |   180 | 17.6 |        
    5303 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5483 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5393 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    5502 |         MASTER-OAFA |   C |   180 | 19.4 |        
    5593 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    5773 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    5702 |         MASTER-OAFA |   C |   180 | 19.3 |        
    5792 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    5901 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6081 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    5992 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6100 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6191 |         MASTER-SAAO | P\  |   180 | 17.8 |        
    6371 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6300 |         MASTER-OAFA |   C |   180 | 19.4 |        
    6391 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6499 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6679 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    6590 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    6699 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6789 |         MASTER-SAAO | P\  |   180 | 17.7 |        
    6969 |         MASTER-SAAO | P\  |   540 | 18.2 |  Coadd 
    6898 |         MASTER-OAFA |   C |   180 | 19.3 |        
    6989 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7098 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7278 |         MASTER-OAFA |   C |   540 | 20.0 |  Coadd 
    7189 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7297 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7388 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7568 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    7497 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7587 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    7696 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7876 |         MASTER-OAFA |   C |   540 | 19.9 |  Coadd 
    7787 |         MASTER-SAAO | P\  |   180 | 17.5 |        
    7896 |         MASTER-OAFA |   C |   180 | 19.3 |        
    7986 |         MASTER-SAAO | P\  |   180 | 17.3 |        
    8166 |         MASTER-SAAO | P\  |   540 | 17.9 |  Coadd 
    8095 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8186 |         MASTER-SAAO | P\  |   180 | 17.4 |        
    8294 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8474 |         MASTER-OAFA |   C |   540 | 19.8 |  Coadd 
    8385 |         MASTER-SAAO | P\  |   180 | 17.2 |        
    8494 |         MASTER-OAFA |   C |   180 | 19.3 |        
    8585 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    8765 |         MASTER-SAAO | P\  |   540 | 17.7 |  Coadd 
    8693 |         MASTER-OAFA |   C |   180 | 19.3 |        
Filter C is a clear (unfiltred) band. 


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 4928
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709881

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
#######################################################################################

  ID = 4927
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709881

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        


The observation and reduction will continue. 
The message may be cited.



#######################################################################################
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  ID = 4926
TYPE = 34
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210905A ( E. Sonbas et al., GCN 30765) errorbox  6 sec after notice time and 414 sec after trigger time at 2021-09-05 00:19:36 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -55.5 deg. 

The galactic latitude b = -37 deg., longitude l = 356 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1709881

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

     455 |         MASTER-SAAO | P\  |    80 | 18.2 |        
     565 |         MASTER-SAAO | P\  |   300 | 19.1 |  Coadd 
     556 |         MASTER-SAAO | P\  |   100 | 18.3 |        
     678 |         MASTER-SAAO | P\  |   120 | 18.5 |        
     826 |         MASTER-SAAO | P\  |   150 | 18.5 |        


The observation and reduction will continue. 
The message may be cited.

MASTER, 2002-2024