MASTER Net MASTER Database: GRB210421.02 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 GRB210421.02
Trignum 1044426
Trigger time 2021-04-21 00:27:30.3
Notice time 2021-04-21 00:28:04.361452
Coord, eb (06h 59m 37.92s , +04d 56m 02.4s) , 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You are viewing outdated information, relevant error box is here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
1597914 2021-04-21 00:30:48.975975 06h 59m 29.76s +04d 55m 12.0s SWIFT 0 alert 1044426 1 78 alert
1597912 2021-04-21 00:30:40.048936 06h 59m 29.76s +04d 55m 12.0s SWIFT 0.00169444 alert 1044426 2 69 alert
1597921 2021-04-21 00:48:27.633253 06h 59m 30.24s +04d 55m 19.2s SWIFT 0.001 alert 1044426 4 67 alert
1597894 2021-04-21 00:28:29.584421 06h 59m 37.92s +04d 56m 02.4s SWIFT 0.05 alert 1044426 2 61 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory links
40.0 2021-04-21 00:27:28.358 06h 21m 06.00s -34d 01m 00.0s OAFA Database OAFA
106.1 2021-04-21 00:26:35.462 14h 01m 10.00s -17d 59m 07.0s IAC Database IAC
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-04-21 00:27:30 (JD 2459325.519097)

Siderial time 16.920148 h

Ra 06:59:37.92 Dec 04:56:02.40
(104.908000d, 4.934000d)

Rise 2021-04-21 07:57:28

Transit 2021-04-21 14:29:37

Set 2021-04-21 21:01:45

Amur

Object: Altitude: -15.29 Azimuth: 242.02

Sun: Altitude: 36.77 Azimuth: 300.13

Moon: Altitude: -12.67 Azimuth: 208.84

Tunka

Object: Altitude: -26.17 Azimuth: 218.77

Sun: Altitude: 21.88 Azimuth: 278.91

Moon: Altitude: -15.85 Azimuth: 185.90

Kislovodsk

Object: Altitude: -35.90 Azimuth: 147.11

Sun: Altitude: -18.28 Azimuth: 232.16

Moon: Altitude: -7.39 Azimuth: 130.57

Tavrida

Object: Altitude: -31.42 Azimuth: 138.34

Sun: Altitude: -22.18 Azimuth: 224.45

Moon: Altitude: -1.96 Azimuth: 124.39

SAAO

Object: Altitude: -37.59 Azimuth: 68.92

Sun: Altitude: -56.86 Azimuth: 301.97

Moon: Altitude: -22.92 Azimuth: 102.51

IAC

Object: Altitude: -1.84 Azimuth: 96.61

Sun: Altitude: -48.99 Azimuth: 166.44

Moon: Altitude: 30.22 Azimuth: 100.48

Argentina

Object: Altitude: 35.76 Azimuth: 124.84

Sun: Altitude: -29.99 Azimuth: 85.36

Moon: Altitude: 34.47 Azimuth: 164.53

Mexico

Object: Altitude: 63.87 Azimuth: 2.02

Sun: Altitude: 17.02 Azimuth: 93.71

Moon: Altitude: 64.08 Azimuth: 283.43

Ural

Object: Altitude: -27.58 Azimuth: 169.67

Sun: Altitude: -2.12 Azimuth: 244.40

Moon: Altitude: -4.82 Azimuth: 145.63

Vostryakovo

Object: Altitude: -24.51 Azimuth: 145.77

Sun: Altitude: -12.91 Azimuth: 225.53

Moon: Altitude: 2.31 Azimuth: 127.28

Gal. latitude: 4.623061 Gal. longitude: 209.831253

Dist. to Sun: 75.504466

Dist. to Moon: 32.269195

Moon coord.: (133.126204 d, 22.145166 d)

Sun coord.: (28.714540 d, 11.768990 d)

Lunar disk: 0.575508

Lunar phase: 81.314205

Lunar bright limb: 286.505270

No SN in this field

2021-04-21 00:28:04 (JD 2459325.519491)

Siderial time 16.929618 h

Ra 06:59:37.92 Dec 04:56:02.40
(104.908000d, 4.934000d)

Rise 2021-04-21 07:57:28

Transit 2021-04-21 14:29:37

Set 2021-04-21 21:01:45

Amur

Object: Altitude: -15.21 Azimuth: 242.14

Sun: Altitude: 36.85 Azimuth: 300.27

Moon: Altitude: -12.62 Azimuth: 208.97

Tunka

Object: Altitude: -26.11 Azimuth: 218.92

Sun: Altitude: 21.97 Azimuth: 279.03

Moon: Altitude: -15.84 Azimuth: 186.03

Kislovodsk

Object: Altitude: -35.95 Azimuth: 147.27

Sun: Altitude: -18.20 Azimuth: 232.28

Moon: Altitude: -7.47 Azimuth: 130.67

Tavrida

Object: Altitude: -31.49 Azimuth: 138.48

Sun: Altitude: -22.11 Azimuth: 224.58

Moon: Altitude: -2.04 Azimuth: 124.49

SAAO

Object: Altitude: -37.70 Azimuth: 68.81

Sun: Altitude: -56.76 Azimuth: 301.79

Moon: Altitude: -23.03 Azimuth: 102.44

IAC

Object: Altitude: -1.96 Azimuth: 96.67

Sun: Altitude: -49.02 Azimuth: 166.65

Moon: Altitude: 30.10 Azimuth: 100.53

Argentina

Object: Altitude: 35.66 Azimuth: 124.72

Sun: Altitude: -30.11 Azimuth: 85.28

Moon: Altitude: 34.44 Azimuth: 164.38

Mexico

Object: Altitude: 63.86 Azimuth: 2.34

Sun: Altitude: 16.90 Azimuth: 93.78

Moon: Altitude: 64.19 Azimuth: 283.56

Ural

Object: Altitude: -27.59 Azimuth: 169.83

Sun: Altitude: -2.05 Azimuth: 244.52

Moon: Altitude: -4.87 Azimuth: 145.75

Vostryakovo

Object: Altitude: -24.55 Azimuth: 145.92

Sun: Altitude: -12.86 Azimuth: 225.66

Moon: Altitude: 2.24 Azimuth: 127.39

Gal. latitude: 4.623061 Gal. longitude: 209.831253

Dist. to Sun: 75.504101

Dist. to Moon: 32.273016

Moon coord.: (133.131541 d, 22.144015 d)

Sun coord.: (28.714907 d, 11.769124 d)

Lunar disk: 0.575548

Lunar phase: 81.309525

Lunar bright limb: 286.507296

No SN in this field

2021-04-21 01:28:04 (JD 2459325.561157)

Siderial time 17.932356 h

Ra 06:59:37.92 Dec 04:56:02.40
(104.908000d, 4.934000d)

Rise 2021-04-21 07:57:28

Transit 2021-04-21 14:29:37

Set 2021-04-21 21:01:45

Amur

Object: Altitude: -6.30 Azimuth: 254.42

Sun: Altitude: 44.35 Azimuth: 316.96

Moon: Altitude: -7.40 Azimuth: 221.51

Tunka

Object: Altitude: -19.41 Azimuth: 233.47

Sun: Altitude: 30.90 Azimuth: 292.08

Moon: Altitude: -13.97 Azimuth: 199.77

Kislovodsk

Object: Altitude: -40.32 Azimuth: 165.54

Sun: Altitude: -8.98 Azimuth: 244.06

Moon: Altitude: -14.79 Azimuth: 142.13

Tavrida

Object: Altitude: -37.34 Azimuth: 155.24

Sun: Altitude: -13.82 Azimuth: 237.34

Moon: Altitude: -10.03 Azimuth: 135.33

SAAO

Object: Altitude: -48.93 Azimuth: 55.07

Sun: Altitude: -45.22 Azimuth: 287.20

Moon: Altitude: -35.04 Azimuth: 95.60

IAC

Object: Altitude: -14.98 Azimuth: 104.19

Sun: Altitude: -49.48 Azimuth: 189.22

Moon: Altitude: 17.65 Azimuth: 106.00

Argentina

Object: Altitude: 24.47 Azimuth: 113.16

Sun: Altitude: -42.69 Azimuth: 75.81

Moon: Altitude: 29.72 Azimuth: 149.55

Mexico

Object: Altitude: 59.83 Azimuth: 33.29

Sun: Altitude: 4.17 Azimuth: 101.25

Moon: Altitude: 75.50 Azimuth: 305.45

Ural

Object: Altitude: -27.84 Azimuth: 186.76

Sun: Altitude: 5.66 Azimuth: 257.04

Moon: Altitude: -8.65 Azimuth: 158.70

Vostryakovo

Object: Altitude: -28.30 Azimuth: 162.13

Sun: Altitude: -6.11 Azimuth: 238.90

Moon: Altitude: -3.84 Azimuth: 139.35

Gal. latitude: 4.623061 Gal. longitude: 209.831253

Dist. to Sun: 75.465500

Dist. to Moon: 32.679604

Moon coord.: (133.696594 d, 22.021157 d)

Sun coord.: (28.753832 d, 11.783307 d)

Lunar disk: 0.579822

Lunar phase: 80.813735

Lunar bright limb: 286.721394

No SN in this field

2024-05-20 07:09:18 (JD 2460450.798125)

Siderial time 1.558702 h

Ra 06:59:37.92 Dec 04:56:02.40
(104.908000d, 4.934000d)

Rise 2024-05-20 06:02:22

Transit 2024-05-20 12:34:31

Set 2024-05-20 19:06:39

Amur

Object: Altitude: 44.08 Azimuth: 11.60

Sun: Altitude: 36.79 Azimuth: 76.62

Moon: Altitude: -4.94 Azimuth: 278.35

Tunka

Object: Altitude: 41.26 Azimuth: 338.46

Sun: Altitude: 49.82 Azimuth: 49.73

Moon: Altitude: -20.18 Azimuth: 258.83

Kislovodsk

Object: Altitude: 13.06 Azimuth: 275.73

Sun: Altitude: 56.19 Azimuth: 305.23

Moon: Altitude: -54.64 Azimuth: 194.27

Tavrida

Object: Altitude: 6.93 Azimuth: 269.91

Sun: Altitude: 50.44 Azimuth: 296.24

Moon: Altitude: -54.40 Azimuth: 179.67

SAAO

Object: Altitude: -9.67 Azimuth: 270.27

Sun: Altitude: 18.64 Azimuth: 230.06

Moon: Altitude: -46.56 Azimuth: 19.44

IAC

Object: Altitude: -35.91 Azimuth: 239.30

Sun: Altitude: 11.05 Azimuth: 253.06

Moon: Altitude: -38.72 Azimuth: 101.58

Argentina

Object: Altitude: -61.98 Azimuth: 18.21

Sun: Altitude: -53.05 Azimuth: 278.85

Moon: Altitude: 16.27 Azimuth: 89.22

Mexico

Object: Altitude: -30.64 Azimuth: 118.25

Sun: Altitude: -38.88 Azimuth: 177.77

Moon: Altitude: 37.42 Azimuth: 46.06

Ural

Object: Altitude: 20.27 Azimuth: 293.64

Sun: Altitude: 51.96 Azimuth: 341.64

Moon: Altitude: -38.22 Azimuth: 212.52

Vostryakovo

Object: Altitude: 8.98 Azimuth: 274.33

Sun: Altitude: 46.57 Azimuth: 310.77

Moon: Altitude: -43.66 Azimuth: 184.91

Gal. latitude: 4.623061 Gal. longitude: 209.831253

Dist. to Sun: 48.730541

Dist. to Moon: 95.771057

Moon coord.: (199.976472 d, -9.132166 d)

Sun coord.: (57.224122 d, 20.035282 d)

Lunar disk: 0.896859

Lunar phase: 37.465725

Lunar bright limb: 291.128148

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4123
TYPE = 35
DAYS = 1


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) was pointed to the SWIFT GRB 210421A errorbox  60869 sec after notice time and 60903 sec after trigger time at 2021-04-21 17:22:34 UT, with upper limit up to  16.9 mag. Observations started at twilight.  The observations began at zenith distance = 44 deg. The sun  altitude  is -15.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the SWIFT GRB 210421A errorbox  64498 sec after notice time and 64532 sec after trigger time at 2021-04-21 18:23:02 UT, with upper limit up to  17.0 mag. The observations began at zenith distance = 62 deg. The sun  altitude  is -18.1 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      67 |         MASTER-OAFA |   C |    40 | 17.2 |  Coadd 
     382 |         MASTER-OAFA |   C |   670 | 18.3 |  Coadd 
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     205 |         MASTER-OAFA |   C |   120 | 17.6 |  Coadd 
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
     279 |         MASTER-OAFA |   C |    50 | 17.1 |        
     354 |         MASTER-OAFA |   C |    60 | 17.3 |        
     444 |         MASTER-OAFA |   C |   240 | 17.9 |  Coadd 
     443 |         MASTER-OAFA |   C |    80 | 17.4 |        
     553 |         MASTER-OAFA |   C |   100 | 17.4 |        
     682 |         MASTER-OAFA |   C |   120 | 17.4 |        
     847 |         MASTER-OAFA |   C |   450 | 17.4 |  Coadd 
     837 |         MASTER-OAFA |   C |   150 | 17.4 |        
    1021 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1831 |         MASTER-OAFA |   C |  1800 | 18.4 |  Coadd 
    1221 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1401 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    1420 |         MASTER-OAFA |   C |   180 | 17.4 |        
    1620 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1819 |         MASTER-OAFA |   C |   180 | 17.6 |        
    1999 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    2019 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2218 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2418 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2598 |         MASTER-OAFA |   C |   540 | 17.3 |  Coadd 
    2617 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2816 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3023 |         MASTER-OAFA |   C |   180 | 17.3 |        
    3203 |         MASTER-OAFA |   C |   540 | 17.9 |  Coadd 
    3833 |         MASTER-OAFA |   C |  1800 | 18.3 |  Coadd 
    3223 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3431 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3631 |         MASTER-OAFA |   C |   180 | 17.5 |        
    3811 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    3830 |         MASTER-OAFA |   C |   180 | 17.5 |        
    4029 |         MASTER-OAFA |   C |   180 | 17.4 |        
    4229 |         MASTER-OAFA |   C |   180 | 17.3 |        
    4409 |         MASTER-OAFA |   C |   540 | 17.7 |  Coadd 
    4429 |         MASTER-OAFA |   C |   180 | 17.2 |        
    4628 |         MASTER-OAFA |   C |   180 | 17.1 |        
    4828 |         MASTER-OAFA |   C |   180 | 17.0 |        
    5008 |         MASTER-OAFA |   C |   540 | 17.5 |  Coadd 
    5027 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5227 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5427 |         MASTER-OAFA |   C |   180 | 16.8 |        
    5607 |         MASTER-OAFA |   C |   540 | 17.1 |  Coadd 
    5626 |         MASTER-OAFA |   C |   180 | 16.6 |        
    5826 |         MASTER-OAFA |   C |   180 | 16.5 |        
    6025 |         MASTER-OAFA |   C |   180 | 16.1 |        
    6205 |         MASTER-OAFA |   C |   540 | 16.2 |  Coadd 
    6225 |         MASTER-OAFA |   C |   180 | 15.5 |        
    6424 |         MASTER-OAFA |   C |   180 | 14.4 |        
    7437 |         MASTER-OAFA |   C |   180 | 16.2 |        
    7654 |         MASTER-OAFA |   C |   180 | 16.4 |        
    7853 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8053 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8252 |         MASTER-OAFA |   C |   180 | 16.2 |        
    8455 |         MASTER-OAFA |   C |   180 | 16.0 |        
    8662 |         MASTER-OAFA |   C |   180 | 15.4 |        
    8862 |         MASTER-OAFA |   C |   180 | 15.5 |        
    9062 |         MASTER-OAFA |   C |   180 | 15.4 |        
    9262 |         MASTER-OAFA |   C |   180 | 15.2 |        
    9461 |         MASTER-OAFA |   C |   180 | 14.7 |        
   60994 |         MASTER-SAAO |   C |   180 | 13.4 |        
   61354 |         MASTER-SAAO |   C |   180 | 16.9 |        
   63731 |         MASTER-SAAO |   C |   180 | 16.9 |        
   64622 |      MASTER-Tavrida |   C |   180 | 17.0 |        
   65223 |      MASTER-Tavrida |   C |   180 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4114
TYPE = 35
DAYS = 0.5


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      67 |         MASTER-OAFA |   C |    40 | 17.2 |  Coadd 
     382 |         MASTER-OAFA |   C |   670 | 18.3 |  Coadd 
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     205 |         MASTER-OAFA |   C |   120 | 17.6 |  Coadd 
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
     279 |         MASTER-OAFA |   C |    50 | 17.1 |        
     354 |         MASTER-OAFA |   C |    60 | 17.3 |        
     444 |         MASTER-OAFA |   C |   240 | 17.9 |  Coadd 
     443 |         MASTER-OAFA |   C |    80 | 17.4 |        
     553 |         MASTER-OAFA |   C |   100 | 17.4 |        
     682 |         MASTER-OAFA |   C |   120 | 17.4 |        
     847 |         MASTER-OAFA |   C |   450 | 17.4 |  Coadd 
     837 |         MASTER-OAFA |   C |   150 | 17.4 |        
    1021 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1831 |         MASTER-OAFA |   C |  1800 | 18.4 |  Coadd 
    1221 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1401 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    1420 |         MASTER-OAFA |   C |   180 | 17.4 |        
    1620 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1819 |         MASTER-OAFA |   C |   180 | 17.6 |        
    1999 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    2019 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2218 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2418 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2598 |         MASTER-OAFA |   C |   540 | 17.3 |  Coadd 
    2617 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2816 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3023 |         MASTER-OAFA |   C |   180 | 17.3 |        
    3203 |         MASTER-OAFA |   C |   540 | 17.9 |  Coadd 
    3833 |         MASTER-OAFA |   C |  1800 | 18.3 |  Coadd 
    3223 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3431 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3631 |         MASTER-OAFA |   C |   180 | 17.5 |        
    3811 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    3830 |         MASTER-OAFA |   C |   180 | 17.5 |        
    4029 |         MASTER-OAFA |   C |   180 | 17.4 |        
    4229 |         MASTER-OAFA |   C |   180 | 17.3 |        
    4409 |         MASTER-OAFA |   C |   540 | 17.7 |  Coadd 
    4429 |         MASTER-OAFA |   C |   180 | 17.2 |        
    4628 |         MASTER-OAFA |   C |   180 | 17.1 |        
    4828 |         MASTER-OAFA |   C |   180 | 17.0 |        
    5008 |         MASTER-OAFA |   C |   540 | 17.5 |  Coadd 
    5027 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5227 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5427 |         MASTER-OAFA |   C |   180 | 16.8 |        
    5607 |         MASTER-OAFA |   C |   540 | 17.1 |  Coadd 
    5626 |         MASTER-OAFA |   C |   180 | 16.6 |        
    5826 |         MASTER-OAFA |   C |   180 | 16.5 |        
    6025 |         MASTER-OAFA |   C |   180 | 16.1 |        
    6205 |         MASTER-OAFA |   C |   540 | 16.2 |  Coadd 
    6225 |         MASTER-OAFA |   C |   180 | 15.5 |        
    6424 |         MASTER-OAFA |   C |   180 | 14.4 |        
    7437 |         MASTER-OAFA |   C |   180 | 16.2 |        
    7654 |         MASTER-OAFA |   C |   180 | 16.4 |        
    7853 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8053 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8252 |         MASTER-OAFA |   C |   180 | 16.2 |        
    8455 |         MASTER-OAFA |   C |   180 | 16.0 |        
    8662 |         MASTER-OAFA |   C |   180 | 15.4 |        
    8862 |         MASTER-OAFA |   C |   180 | 15.5 |        
    9062 |         MASTER-OAFA |   C |   180 | 15.4 |        
    9262 |         MASTER-OAFA |   C |   180 | 15.2 |        
    9461 |         MASTER-OAFA |   C |   180 | 14.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4111
TYPE = 35
DAYS = 0.1


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      67 |         MASTER-OAFA |   C |    40 | 17.2 |  Coadd 
     382 |         MASTER-OAFA |   C |   670 | 18.3 |  Coadd 
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     205 |         MASTER-OAFA |   C |   120 | 17.6 |  Coadd 
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
     279 |         MASTER-OAFA |   C |    50 | 17.1 |        
     354 |         MASTER-OAFA |   C |    60 | 17.3 |        
     444 |         MASTER-OAFA |   C |   240 | 17.9 |  Coadd 
     443 |         MASTER-OAFA |   C |    80 | 17.4 |        
     553 |         MASTER-OAFA |   C |   100 | 17.4 |        
     682 |         MASTER-OAFA |   C |   120 | 17.4 |        
     847 |         MASTER-OAFA |   C |   450 | 17.4 |  Coadd 
     837 |         MASTER-OAFA |   C |   150 | 17.4 |        
    1021 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1831 |         MASTER-OAFA |   C |  1800 | 18.4 |  Coadd 
    1221 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1401 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    1420 |         MASTER-OAFA |   C |   180 | 17.4 |        
    1620 |         MASTER-OAFA |   C |   180 | 17.5 |        
    1819 |         MASTER-OAFA |   C |   180 | 17.6 |        
    1999 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    2019 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2218 |         MASTER-OAFA |   C |   180 | 17.5 |        
    2418 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2598 |         MASTER-OAFA |   C |   540 | 17.3 |  Coadd 
    2617 |         MASTER-OAFA |   C |   180 | 17.3 |        
    2816 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3023 |         MASTER-OAFA |   C |   180 | 17.3 |        
    3203 |         MASTER-OAFA |   C |   540 | 17.9 |  Coadd 
    3833 |         MASTER-OAFA |   C |  1800 | 18.3 |  Coadd 
    3223 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3431 |         MASTER-OAFA |   C |   180 | 17.4 |        
    3631 |         MASTER-OAFA |   C |   180 | 17.5 |        
    3811 |         MASTER-OAFA |   C |   540 | 18.0 |  Coadd 
    3830 |         MASTER-OAFA |   C |   180 | 17.5 |        
    4029 |         MASTER-OAFA |   C |   180 | 17.4 |        
    4229 |         MASTER-OAFA |   C |   180 | 17.3 |        
    4409 |         MASTER-OAFA |   C |   540 | 17.7 |  Coadd 
    4429 |         MASTER-OAFA |   C |   180 | 17.2 |        
    4628 |         MASTER-OAFA |   C |   180 | 17.1 |        
    4828 |         MASTER-OAFA |   C |   180 | 17.0 |        
    5008 |         MASTER-OAFA |   C |   540 | 17.5 |  Coadd 
    5027 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5227 |         MASTER-OAFA |   C |   180 | 16.9 |        
    5427 |         MASTER-OAFA |   C |   180 | 16.8 |        
    5607 |         MASTER-OAFA |   C |   540 | 17.1 |  Coadd 
    5626 |         MASTER-OAFA |   C |   180 | 16.6 |        
    5826 |         MASTER-OAFA |   C |   180 | 16.5 |        
    6025 |         MASTER-OAFA |   C |   180 | 16.1 |        
    6205 |         MASTER-OAFA |   C |   540 | 16.2 |  Coadd 
    6225 |         MASTER-OAFA |   C |   180 | 15.5 |        
    6424 |         MASTER-OAFA |   C |   180 | 14.4 |        
    7437 |         MASTER-OAFA |   C |   180 | 16.2 |        
    7654 |         MASTER-OAFA |   C |   180 | 16.4 |        
    7853 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8053 |         MASTER-OAFA |   C |   180 | 16.4 |        
    8252 |         MASTER-OAFA |   C |   180 | 16.2 |        
    8455 |         MASTER-OAFA |   C |   180 | 16.0 |        
    8662 |         MASTER-OAFA |   C |   180 | 15.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4107
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4106
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4105
TYPE = 34
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) was pointed to the SWIFT GRB 210421A ( M. J. Moss et al., GCN 29849) errorbox  13 sec after notice time and 47 sec after trigger time at 2021-04-21 00:28:17 UT, with upper limit up to  17.1 mag. The observations began at zenith distance = 54 deg. The sun  altitude  is -30.5 deg. 

The galactic latitude b =  5 deg., longitude l = 210 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1597889

We obtain a following upper limits.  

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

      52 |         MASTER-OAFA |   C |    10 | 16.4 |        
      82 |         MASTER-OAFA |   C |    10 | 16.4 |        
     116 |         MASTER-OAFA |   C |    20 | 16.8 |        
     160 |         MASTER-OAFA |   C |    30 | 17.0 |        
     215 |         MASTER-OAFA |   C |    40 | 17.1 |        
Filter C is a clear (unfiltred) band. 


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

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