MASTER Net MASTER Database: GRB210621.71 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 GRB210621.71
Trignum 1057131
Trigger time 2021-06-21 17:04:36.76
Notice time 2021-06-21 17:06:24.613395
Coord, eb (15h 55m 14.88s , -54d 03m 46.8s) , 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)

You are viewing outdated information, relevant error box is here

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2212666 2023-04-25 18:17:12.461901 15h 55m 14.88s -54d 03m 46.8s SWIFT 0.05 retraction 1057131 1 4044 retraction
1641846 2021-06-21 17:19:52.375367 15h 55m 08.88s -54d 03m 39.6s SWIFT 0.0005 alert 1057131 7 67 alert
1641833 2021-06-21 17:06:33.969283 15h 55m 14.88s -54d 03m 46.8s SWIFT 0.05 alert 1057131 6 61 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory links
9.2 2021-06-21 17:04:36.356 16h 35m 56.00s -61d 30m 49.0s SAAO Database SAAO
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-06-21 17:04:36 (JD 2459387.211528)

Siderial time 13.592280 h

Ra 15:55:14.88 Dec -54:03:46.80
(238.812000d, -54.063000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -24.07 Azimuth: 31.74

Sun: Altitude: -13.36 Azimuth: 202.07

Moon: Altitude: 1.67 Azimuth: 63.76

Tunka

Object: Altitude: -18.89 Azimuth: 18.36

Sun: Altitude: -14.74 Azimuth: 179.12

Moon: Altitude: 13.12 Azimuth: 43.32

Kislovodsk

Object: Altitude: -11.11 Azimuth: 342.59

Sun: Altitude: -2.37 Azimuth: 126.22

Moon: Altitude: 29.23 Azimuth: 341.38

Tavrida

Object: Altitude: -14.10 Azimuth: 337.86

Sun: Altitude: 3.26 Azimuth: 120.30

Moon: Altitude: 25.95 Azimuth: 332.71

SAAO

Object: Altitude: 47.78 Azimuth: 316.71

Sun: Altitude: -17.76 Azimuth: 106.95

Moon: Altitude: 51.03 Azimuth: 252.84

IAC

Object: Altitude: -22.05 Azimuth: 320.72

Sun: Altitude: 36.78 Azimuth: 99.30

Moon: Altitude: 4.90 Azimuth: 290.01

Argentina

Object: Altitude: 1.97 Azimuth: 338.74

Sun: Altitude: 34.39 Azimuth: 172.58

Moon: Altitude: -22.04 Azimuth: 305.51

Mexico

Object: Altitude: -66.89 Azimuth: 4.38

Sun: Altitude: 58.64 Azimuth: 275.48

Moon: Altitude: -71.42 Azimuth: 212.90

Ural

Object: Altitude: -21.60 Azimuth: 351.83

Sun: Altitude: -1.29 Azimuth: 140.01

Moon: Altitude: 17.91 Azimuth: 0.26

Vostryakovo

Object: Altitude: -23.10 Azimuth: 338.68

Sun: Altitude: 6.72 Azimuth: 122.31

Moon: Altitude: 17.26 Azimuth: 338.27

Gal. latitude: -0.821962 Gal. longitude: 328.226618

Dist. to Sun: 141.394732

Dist. to Moon: 40.364960

Moon coord.: (225.554860 d, -15.053190 d)

Sun coord.: (90.264611 d, 23.444298 d)

Lunar disk: 0.867059

Lunar phase: 42.767219

Lunar bright limb: 288.471132

No SN in this field

2021-06-21 17:06:24 (JD 2459387.212778)

Siderial time 13.622362 h

Ra 15:55:14.88 Dec -54:03:46.80
(238.812000d, -54.063000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -24.22 Azimuth: 31.98

Sun: Altitude: -13.25 Azimuth: 202.48

Moon: Altitude: 1.42 Azimuth: 64.10

Tunka

Object: Altitude: -18.98 Azimuth: 18.63

Sun: Altitude: -14.75 Azimuth: 179.54

Moon: Altitude: 12.93 Azimuth: 43.70

Kislovodsk

Object: Altitude: -11.02 Azimuth: 342.84

Sun: Altitude: -2.63 Azimuth: 126.54

Moon: Altitude: 29.33 Azimuth: 341.85

Tavrida

Object: Altitude: -13.98 Azimuth: 338.10

Sun: Altitude: 2.99 Azimuth: 120.61

Moon: Altitude: 26.09 Azimuth: 333.15

SAAO

Object: Altitude: 48.04 Azimuth: 316.77

Sun: Altitude: -18.12 Azimuth: 106.75

Moon: Altitude: 51.39 Azimuth: 252.48

IAC

Object: Altitude: -21.79 Azimuth: 320.81

Sun: Altitude: 36.39 Azimuth: 99.47

Moon: Altitude: 5.26 Azimuth: 290.24

Argentina

Object: Altitude: 2.11 Azimuth: 338.52

Sun: Altitude: 34.33 Azimuth: 172.08

Moon: Altitude: -21.74 Azimuth: 305.20

Mexico

Object: Altitude: -66.92 Azimuth: 3.71

Sun: Altitude: 59.02 Azimuth: 275.78

Moon: Altitude: -71.22 Azimuth: 214.05

Ural

Object: Altitude: -21.57 Azimuth: 352.12

Sun: Altitude: -1.45 Azimuth: 140.39

Moon: Altitude: 17.90 Azimuth: 0.70

Vostryakovo

Object: Altitude: -23.01 Azimuth: 338.95

Sun: Altitude: 6.50 Azimuth: 122.67

Moon: Altitude: 17.35 Azimuth: 338.70

Gal. latitude: -0.821962 Gal. longitude: 328.226618

Dist. to Sun: 141.394145

Dist. to Moon: 40.354874

Moon coord.: (225.572751 d, -15.059832 d)

Sun coord.: (90.265911 d, 23.444296 d)

Lunar disk: 0.867162

Lunar phase: 42.749948

Lunar bright limb: 288.465550

No SN in this field

2021-06-21 18:06:24 (JD 2459387.254444)

Siderial time 14.625100 h

Ra 15:55:14.88 Dec -54:03:46.80
(238.812000d, -54.063000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -29.84 Azimuth: 39.61

Sun: Altitude: -8.60 Azimuth: 215.67

Moon: Altitude: -7.38 Azimuth: 74.93

Tunka

Object: Altitude: -22.60 Azimuth: 27.22

Sun: Altitude: -13.68 Azimuth: 193.69

Moon: Altitude: 5.92 Azimuth: 55.92

Kislovodsk

Object: Altitude: -8.59 Azimuth: 351.44

Sun: Altitude: -10.67 Azimuth: 137.79

Moon: Altitude: 30.95 Azimuth: 357.88

Tavrida

Object: Altitude: -10.73 Azimuth: 346.48

Sun: Altitude: -5.63 Azimuth: 131.34

Moon: Altitude: 29.25 Azimuth: 348.49

SAAO

Object: Altitude: 56.44 Azimuth: 321.12

Sun: Altitude: -30.44 Azimuth: 100.01

Moon: Altitude: 62.58 Azimuth: 237.00

IAC

Object: Altitude: -13.75 Azimuth: 324.58

Sun: Altitude: 23.49 Azimuth: 104.99

Moon: Altitude: 16.73 Azimuth: 298.32

Argentina

Object: Altitude: 7.52 Azimuth: 331.54

Sun: Altitude: 30.84 Azimuth: 156.27

Moon: Altitude: -11.02 Azimuth: 295.89

Mexico

Object: Altitude: -65.28 Azimuth: 342.22

Sun: Altitude: 71.56 Azimuth: 289.73

Moon: Altitude: -62.09 Azimuth: 241.35

Ural

Object: Altitude: -21.12 Azimuth: 1.56

Sun: Altitude: -5.90 Azimuth: 153.43

Moon: Altitude: 16.59 Azimuth: 15.23

Vostryakovo

Object: Altitude: -20.58 Azimuth: 348.08

Sun: Altitude: -0.14 Azimuth: 134.73

Moon: Altitude: 19.12 Azimuth: 353.26

Gal. latitude: -0.821962 Gal. longitude: 328.226618

Dist. to Sun: 141.374570

Dist. to Moon: 40.021438

Moon coord.: (226.169959 d, -15.280499 d)

Sun coord.: (90.309224 d, 23.444223 d)

Lunar disk: 0.870554

Lunar phase: 42.174066

Lunar bright limb: 288.277622

No SN in this field

2024-07-27 07:04:15 (JD 2460518.794618)

Siderial time 5.942573 h

Ra 15:55:14.88 Dec -54:03:46.80
(238.812000d, -54.063000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -25.76 Azimuth: 325.72

Sun: Altitude: 38.45 Azimuth: 72.51

Moon: Altitude: -26.23 Azimuth: 155.37

Tunka

Object: Altitude: -36.86 Azimuth: 313.13

Sun: Altitude: 50.75 Azimuth: 44.21

Moon: Altitude: -15.95 Azimuth: 131.83

Kislovodsk

Object: Altitude: -64.98 Azimuth: 306.82

Sun: Altitude: 53.25 Azimuth: 301.48

Moon: Altitude: 19.64 Azimuth: 85.63

Tavrida

Object: Altitude: -70.43 Azimuth: 308.01

Sun: Altitude: 47.38 Azimuth: 293.22

Moon: Altitude: 25.54 Azimuth: 78.94

SAAO

Object: Altitude: -2.77 Azimuth: 352.10

Sun: Altitude: 16.76 Azimuth: 233.35

Moon: Altitude: 25.22 Azimuth: 122.34

IAC

Object: Altitude: -58.94 Azimuth: 27.33

Sun: Altitude: 7.50 Azimuth: 252.23

Moon: Altitude: 67.98 Azimuth: 38.32

Argentina

Object: Altitude: 18.13 Azimuth: 36.93

Sun: Altitude: -55.79 Azimuth: 283.00

Moon: Altitude: 33.59 Azimuth: 228.19

Mexico

Object: Altitude: -10.61 Azimuth: 31.92

Sun: Altitude: -39.50 Azimuth: 173.13

Moon: Altitude: 13.68 Azimuth: 265.97

Ural

Object: Altitude: -61.02 Azimuth: 286.68

Sun: Altitude: 50.38 Azimuth: 336.40

Moon: Altitude: 8.86 Azimuth: 95.47

Vostryakovo

Object: Altitude: -72.47 Azimuth: 278.38

Sun: Altitude: 44.14 Azimuth: 306.90

Moon: Altitude: 20.97 Azimuth: 77.58

Gal. latitude: -0.821962 Gal. longitude: 328.226618

Dist. to Sun: 118.298493

Dist. to Moon: 127.176406

Moon coord.: (21.337922 d, 10.398912 d)

Sun coord.: (126.744661 d, 19.163947 d)

Lunar disk: 0.595053

Lunar phase: 79.040979

Lunar bright limb: 67.975546

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4469
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  17.8 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB210621.71 errorbox  23996 sec after notice time and 24103 sec after trigger time at 2021-06-21 23:46:20 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 37 deg. The sun  altitude  is -26.1 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641833

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     114 |         MASTER-SAAO | P\  |    70 | 16.1 |  Coadd 
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     288 |         MASTER-SAAO | P\  |   160 | 16.4 |  Coadd 
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        
     466 |         MASTER-SAAO | P\  |    80 | 16.5 |        
     581 |         MASTER-SAAO | P\  |   310 | 17.1 |  Coadd 
     576 |         MASTER-SAAO | P\  |   100 | 16.4 |        
     711 |         MASTER-SAAO | P\  |   130 | 16.7 |        
     875 |         MASTER-SAAO | P\  |   160 | 16.7 |        
    1055 |         MASTER-SAAO | P\  |   520 | 17.1 |  Coadd 
    1065 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    1264 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1464 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1644 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    1664 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1863 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2243 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    2263 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2462 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2661 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2841 |         MASTER-SAAO | P\  |   540 | 16.9 |  Coadd 
    2861 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3072 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3272 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3452 |         MASTER-SAAO | P\  |   540 | 17.4 |  Coadd 
    3471 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3670 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    3870 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4050 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4070 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    4269 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4469 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4649 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4668 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4867 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5067 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5247 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    5267 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5466 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    5665 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5845 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    5865 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    6064 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6264 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    6444 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    6463 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6663 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    6863 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    7043 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7062 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7262 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7461 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7641 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7661 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7861 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8243 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    8262 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    8462 |         MASTER-SAAO | P\  |   180 | 16.5 |        
    8661 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    8861 |         MASTER-SAAO | P\  |   180 | 16.9 |        
   10099 |         MASTER-SAAO |   C |   180 | 17.8 |        
   11220 |         MASTER-SAAO |   C |   180 | 17.5 |        
   12316 |         MASTER-SAAO |   C |   180 | 17.3 |        
   24194 |         MASTER-OAFA |   C |   180 | 17.7 |        
   25113 |         MASTER-SAAO |   C |   180 | 17.2 |        
   25275 |         MASTER-OAFA |   C |   180 | 17.6 |        
   25313 |         MASTER-SAAO |   C |   180 | 16.7 |        
   26432 |         MASTER-OAFA |   C |   180 | 17.7 |        
   39837 |         MASTER-OAFA |   C |    60 | 17.1 |        
   39916 |         MASTER-OAFA |   C |    60 | 16.8 |        
   40792 |         MASTER-OAFA |   C |    60 | 17.1 |        
   40872 |         MASTER-OAFA |   C |    60 | 16.8 |        
   41004 |         MASTER-SAAO |   C |    60 | 16.5 |        
   41749 |         MASTER-OAFA |   C |    60 | 17.1 |        
   41828 |         MASTER-OAFA |   C |    60 | 16.9 |        
   42044 |         MASTER-SAAO |   C |    60 | 15.3 |        
   49314 |         MASTER-OAFA |   C |   180 | 17.4 |        
   49494 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
   49514 |         MASTER-OAFA |   C |   180 | 17.4 |        
   49713 |         MASTER-OAFA |   C |   180 | 17.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4467
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  17.8 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB210621.71 errorbox  23996 sec after notice time and 24103 sec after trigger time at 2021-06-21 23:46:20 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 37 deg. The sun  altitude  is -26.1 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641833

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     114 |         MASTER-SAAO | P\  |    70 | 16.1 |  Coadd 
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     288 |         MASTER-SAAO | P\  |   160 | 16.4 |  Coadd 
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        
     466 |         MASTER-SAAO | P\  |    80 | 16.5 |        
     581 |         MASTER-SAAO | P\  |   310 | 17.1 |  Coadd 
     576 |         MASTER-SAAO | P\  |   100 | 16.4 |        
     711 |         MASTER-SAAO | P\  |   130 | 16.7 |        
     875 |         MASTER-SAAO | P\  |   160 | 16.7 |        
    1055 |         MASTER-SAAO | P\  |   520 | 17.1 |  Coadd 
    1065 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    1264 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1464 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1644 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    1664 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1863 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2243 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    2263 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2462 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2661 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2841 |         MASTER-SAAO | P\  |   540 | 16.9 |  Coadd 
    2861 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3072 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3272 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3452 |         MASTER-SAAO | P\  |   540 | 17.4 |  Coadd 
    3471 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3670 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    3870 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4050 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4070 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    4269 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4469 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4649 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4668 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4867 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5067 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5247 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    5267 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5466 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    5665 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5845 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    5865 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    6064 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6264 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    6444 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    6463 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6663 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    6863 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    7043 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7062 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7262 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7461 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7641 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7661 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7861 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8243 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    8262 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    8462 |         MASTER-SAAO | P\  |   180 | 16.5 |        
    8661 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    8861 |         MASTER-SAAO | P\  |   180 | 16.9 |        
   10099 |         MASTER-SAAO |   C |   180 | 17.8 |        
   11220 |         MASTER-SAAO |   C |   180 | 17.5 |        
   12316 |         MASTER-SAAO |   C |   180 | 17.3 |        
   24194 |         MASTER-OAFA |   C |   180 | 17.7 |        
   25113 |         MASTER-SAAO |   C |   180 | 17.2 |        
   25275 |         MASTER-OAFA |   C |   180 | 17.6 |        
   25313 |         MASTER-SAAO |   C |   180 | 16.7 |        
   26432 |         MASTER-OAFA |   C |   180 | 17.7 |        
   41004 |         MASTER-SAAO |   C |    60 | 16.5 |        
   42044 |         MASTER-SAAO |   C |    60 | 15.3 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4465
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641833

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     114 |         MASTER-SAAO | P\  |    70 | 16.1 |  Coadd 
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     288 |         MASTER-SAAO | P\  |   160 | 16.4 |  Coadd 
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        
     466 |         MASTER-SAAO | P\  |    80 | 16.5 |        
     581 |         MASTER-SAAO | P\  |   310 | 17.1 |  Coadd 
     576 |         MASTER-SAAO | P\  |   100 | 16.4 |        
     711 |         MASTER-SAAO | P\  |   130 | 16.7 |        
     875 |         MASTER-SAAO | P\  |   160 | 16.7 |        
    1055 |         MASTER-SAAO | P\  |   520 | 17.1 |  Coadd 
    1065 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    1264 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1464 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1644 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    1664 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    1863 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2243 |         MASTER-SAAO | P\  |   540 | 17.2 |  Coadd 
    2263 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2462 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    2661 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    2841 |         MASTER-SAAO | P\  |   540 | 16.9 |  Coadd 
    2861 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3072 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3272 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3452 |         MASTER-SAAO | P\  |   540 | 17.4 |  Coadd 
    3471 |         MASTER-SAAO | P\  |   180 | 17.0 |        
    3670 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    3870 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4050 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4070 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    4269 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4469 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    4649 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    4668 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    4867 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5067 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5247 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    5267 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    5466 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    5665 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    5845 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    5865 |         MASTER-SAAO | P\  |   180 | 16.6 |        
    6064 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6264 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    6444 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    6463 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    6663 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    6863 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    7043 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7062 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7262 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7461 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    7641 |         MASTER-SAAO | P\  |   540 | 17.1 |  Coadd 
    7661 |         MASTER-SAAO | P\  |   180 | 16.9 |        
    7861 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8063 |         MASTER-SAAO | P\  |   180 | 16.7 |        
    8243 |         MASTER-SAAO | P\  |   540 | 17.0 |  Coadd 
    8262 |         MASTER-SAAO | P\  |   180 | 16.8 |        
    8462 |         MASTER-SAAO | P\  |   180 | 16.5 |        
    8661 |         MASTER-SAAO | P\  |   180 | 16.9 |        


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



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

  ID = 4464
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641828

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        


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



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

  ID = 4463
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641828

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        


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



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

  ID = 4462
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 GRB210621.71 (trigger No 1057131,15h 55m 14.88s , -54d 03m 46.8s, R=0.05) errorbox 79 sec after trigger time at 2021-06-21 17:05:55 UT, with upper limit up to  16.6 mag. The observations began at zenith distance = 43 deg. The sun  altitude  is -17.3 deg. 

The galactic latitude b = -1 deg., longitude l = 328 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1641828

We obtain a following upper limits.  

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

      89 |         MASTER-SAAO | P\  |    20 | 15.6 |        
     129 |         MASTER-SAAO | P\  |    20 | 16.0 |        
     173 |         MASTER-SAAO | P\  |    30 | 16.1 |        
     228 |         MASTER-SAAO | P\  |    40 | 15.6 |        
     292 |         MASTER-SAAO | P\  |    50 | 16.6 |        
     372 |         MASTER-SAAO | P\  |    70 | 16.6 |        


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

MASTER, 2002-2024