MASTER Net MASTER Database: GRB210421.45 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 FERMI GRB210421.45
Trignum 640695289
Trigger time 2021-04-21 10:54:44.81
Notice time 2021-04-21 19:05:46.748778
Coord, eb (18h 08m 19.20s , +57d 09m 00.0s) , 2.13
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
1598317 2021-04-21 19:05:46.748778 18h 08m 19.20s +57d 09m 00.0s FERMI 2.13 alert 640695289 1 115 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
93.5 2021-04-21 10:54:42.019 20h 08m 21.00s -32d 48m 08.0s OAFA 29008 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-04-21 10:54:44 (JD 2459325.954676)

Siderial time 3.402658 h

Ra 18:08:19.20 Dec 57:09:00.00
(272.080000d, 57.150000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 24.74 Azimuth: 206.72

Sun: Altitude: -4.18 Azimuth: 114.36

Moon: Altitude: 60.40 Azimuth: 3.57

Tunka

Object: Altitude: 20.79 Azimuth: 193.87

Sun: Altitude: 10.96 Azimuth: 95.40

Moon: Altitude: 54.35 Azimuth: 322.07

Kislovodsk

Object: Altitude: 15.33 Azimuth: 160.63

Sun: Altitude: 50.68 Azimuth: 44.16

Moon: Altitude: 19.06 Azimuth: 259.14

Tavrida

Object: Altitude: 18.48 Azimuth: 156.30

Sun: Altitude: 53.63 Azimuth: 31.24

Moon: Altitude: 13.36 Azimuth: 253.89

SAAO

Object: Altitude: -43.92 Azimuth: 140.39

Sun: Altitude: 45.43 Azimuth: 172.86

Moon: Altitude: -23.04 Azimuth: 259.26

IAC

Object: Altitude: 26.19 Azimuth: 142.98

Sun: Altitude: 55.77 Azimuth: 292.00

Moon: Altitude: -28.80 Azimuth: 220.95

Argentina

Object: Altitude: -2.97 Azimuth: 163.26

Sun: Altitude: -2.10 Azimuth: 257.27

Moon: Altitude: -72.68 Azimuth: 54.01

Mexico

Object: Altitude: 63.16 Azimuth: 190.88

Sun: Altitude: -22.78 Azimuth: 239.05

Moon: Altitude: -15.39 Azimuth: 126.50

Ural

Object: Altitude: 25.21 Azimuth: 168.68

Sun: Altitude: 33.86 Azimuth: 54.71

Moon: Altitude: 30.26 Azimuth: 278.36

Vostryakovo

Object: Altitude: 27.27 Azimuth: 156.47

Sun: Altitude: 43.23 Azimuth: 30.36

Moon: Altitude: 18.19 Azimuth: 259.59

Gal. latitude: 28.141102 Gal. longitude: 85.735520

Dist. to Sun: 93.889054

Dist. to Moon: 92.783732

Moon coord.: (139.019634 d, 20.758422 d)

Sun coord.: (29.121613 d, 11.916986 d)

Lunar disk: 0.620145

Lunar phase: 76.096401

Lunar bright limb: 288.693249

No SN in this field

2021-04-21 19:05:46 (JD 2459326.295671)

Siderial time 11.608954 h

Ra 18:08:19.20 Dec 57:09:00.00
(272.080000d, 57.150000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 81.67 Azimuth: 211.78

Sun: Altitude: -11.64 Azimuth: 234.44

Moon: Altitude: -2.71 Azimuth: 125.52

Tunka

Object: Altitude: 70.59 Azimuth: 241.26

Sun: Altitude: -21.04 Azimuth: 211.75

Moon: Altitude: 11.65 Azimuth: 106.83

Kislovodsk

Object: Altitude: 34.06 Azimuth: 220.83

Sun: Altitude: -27.73 Azimuth: 146.00

Moon: Altitude: 51.80 Azimuth: 62.07

Tavrida

Object: Altitude: 30.94 Azimuth: 218.29

Sun: Altitude: -23.20 Azimuth: 138.06

Moon: Altitude: 56.32 Azimuth: 50.32

SAAO

Object: Altitude: -39.92 Azimuth: 219.96

Sun: Altitude: -38.23 Azimuth: 79.32

Moon: Altitude: 36.47 Azimuth: 163.86

IAC

Object: Altitude: -1.36 Azimuth: 194.72

Sun: Altitude: 5.18 Azimuth: 100.89

Moon: Altitude: 66.76 Azimuth: 286.99

Argentina

Object: Altitude: -59.42 Azimuth: 153.34

Sun: Altitude: 33.19 Azimuth: 134.32

Moon: Altitude: 0.69 Azimuth: 246.38

Mexico

Object: Altitude: 14.12 Azimuth: 149.28

Sun: Altitude: 70.74 Azimuth: 350.15

Moon: Altitude: -11.55 Azimuth: 238.59

Ural

Object: Altitude: 50.91 Azimuth: 236.59

Sun: Altitude: -20.05 Azimuth: 166.06

Moon: Altitude: 36.36 Azimuth: 68.11

Vostryakovo

Object: Altitude: 40.52 Azimuth: 225.00

Sun: Altitude: -16.44 Azimuth: 144.09

Moon: Altitude: 47.33 Azimuth: 45.26

Gal. latitude: 28.141102 Gal. longitude: 85.735520

Dist. to Sun: 93.938884

Dist. to Moon: 92.142356

Moon coord.: (143.610346 d, 19.518095 d)

Sun coord.: (29.440537 d, 12.032419 d)

Lunar disk: 0.654876

Lunar phase: 71.955728

Lunar bright limb: 290.320894

No SN in this field

2021-04-21 20:05:46 (JD 2459326.337338)

Siderial time 12.611692 h

Ra 18:08:19.20 Dec 57:09:00.00
(272.080000d, 57.150000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 82.03 Azimuth: 151.69

Sun: Altitude: -3.29 Azimuth: 246.62

Moon: Altitude: -9.78 Azimuth: 137.27

Tunka

Object: Altitude: 78.58 Azimuth: 235.29

Sun: Altitude: -15.22 Azimuth: 225.93

Moon: Altitude: 3.25 Azimuth: 117.70

Kislovodsk

Object: Altitude: 41.48 Azimuth: 225.09

Sun: Altitude: -32.47 Azimuth: 162.07

Moon: Altitude: 41.92 Azimuth: 75.95

Tavrida

Object: Altitude: 37.93 Azimuth: 223.35

Sun: Altitude: -29.23 Azimuth: 152.99

Moon: Altitude: 47.39 Azimuth: 67.18

SAAO

Object: Altitude: -31.82 Azimuth: 218.99

Sun: Altitude: -50.39 Azimuth: 67.75

Moon: Altitude: 31.65 Azimuth: 148.42

IAC

Object: Altitude: 2.80 Azimuth: 201.73

Sun: Altitude: -7.59 Azimuth: 108.11

Moon: Altitude: 77.78 Azimuth: 315.04

Argentina

Object: Altitude: -63.76 Azimuth: 167.89

Sun: Altitude: 23.15 Azimuth: 122.15

Moon: Altitude: 11.68 Azimuth: 238.23

Mexico

Object: Altitude: 8.07 Azimuth: 154.84

Sun: Altitude: 68.14 Azimuth: 32.16

Moon: Altitude: -0.62 Azimuth: 246.83

Ural

Object: Altitude: 58.00 Azimuth: 243.52

Sun: Altitude: -20.90 Azimuth: 181.70

Moon: Altitude: 28.64 Azimuth: 81.49

Vostryakovo

Object: Altitude: 46.92 Azimuth: 231.98

Sun: Altitude: -20.49 Azimuth: 158.96

Moon: Altitude: 40.58 Azimuth: 61.81

Gal. latitude: 28.141102 Gal. longitude: 85.735520

Dist. to Sun: 93.944963

Dist. to Moon: 92.062526

Moon coord.: (144.169815 d, 19.357495 d)

Sun coord.: (29.479521 d, 12.046499 d)

Lunar disk: 0.659097

Lunar phase: 71.446287

Lunar bright limb: 290.514184

No SN in this field

2025-05-09 12:05:49 (JD 2460805.004039)

Siderial time 5.775455 h

Ra 18:08:19.20 Dec 57:09:00.00
(272.080000d, 57.150000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 37.80 Azimuth: 223.09

Sun: Altitude: -9.37 Azimuth: 132.37

Moon: Altitude: 31.11 Azimuth: 341.68

Tunka

Object: Altitude: 29.51 Azimuth: 212.67

Sun: Altitude: 4.29 Azimuth: 112.95

Moon: Altitude: 21.95 Azimuth: 316.37

Kislovodsk

Object: Altitude: 10.90 Azimuth: 179.70

Sun: Altitude: 43.82 Azimuth: 69.85

Moon: Altitude: -12.52 Azimuth: 267.67

Tavrida

Object: Altitude: 12.16 Azimuth: 174.99

Sun: Altitude: 48.94 Azimuth: 60.28

Moon: Altitude: -18.49 Azimuth: 261.30

SAAO

Object: Altitude: -60.91 Azimuth: 155.00

Sun: Altitude: 35.35 Azimuth: 152.18

Moon: Altitude: -22.59 Azimuth: 294.80

IAC

Object: Altitude: 9.00 Azimuth: 151.73

Sun: Altitude: 73.28 Azimuth: 307.67

Moon: Altitude: -61.32 Azimuth: 225.80

Argentina

Object: Altitude: -15.49 Azimuth: 148.64

Sun: Altitude: 9.44 Azimuth: 242.61

Moon: Altitude: -40.34 Azimuth: 44.46

Mexico

Object: Altitude: 58.11 Azimuth: 152.68

Sun: Altitude: -5.39 Azimuth: 245.94

Moon: Altitude: -17.62 Azimuth: 92.45

Ural

Object: Altitude: 24.95 Azimuth: 189.77

Sun: Altitude: 29.53 Azimuth: 76.03

Moon: Altitude: -2.42 Azimuth: 279.09

Vostryakovo

Object: Altitude: 22.61 Azimuth: 176.91

Sun: Altitude: 41.18 Azimuth: 55.44

Moon: Altitude: -14.45 Azimuth: 261.21

Gal. latitude: 28.141102 Gal. longitude: 85.735520

Dist. to Sun: 96.294504

Dist. to Moon: 90.404507

Moon coord.: (192.223377 d, -6.965891 d)

Sun coord.: (46.310543 d, 17.412706 d)

Lunar disk: 0.910830

Lunar phase: 34.748708

Lunar bright limb: 290.624965

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4130
TYPE = 35
DAYS = 2


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210421B ( Fermi GBM team, GCN 29870) errorbox  63 sec after notice time and 29500 sec after trigger time at 2021-04-21 19:06:25 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b = 28 deg., longitude l = 86 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1598312

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   29590 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.66s , +57d 18m 06.1s) |   C |   180 | 18.5 |        
   29770 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.68s , +57d 18m 05.9s) |   C |   540 | 19.2 |  Coadd 
   29790 | 2021-04-21 19:09:44 |      MASTER-Tavrida | (18h 06m 04.40s , +57d 18m 11.5s) |   C |   180 | 18.5 |        
   29989 | 2021-04-21 19:13:04 |      MASTER-Tavrida | (18h 06m 00.51s , +57d 19m 50.6s) |   C |   180 | 18.7 |        
   30189 | 2021-04-21 19:16:23 |      MASTER-Tavrida | (18h 06m 00.35s , +57d 18m 29.6s) |   C |   180 | 18.5 |        
   31289 | 2021-04-21 19:35:43 |      MASTER-Tavrida | (17h 57m 00.62s , +58d 10m 22.7s) |   C |    60 | 18.1 |        
   31369 | 2021-04-21 19:37:03 |      MASTER-Tavrida | (18h 12m 11.20s , +58d 11m 01.8s) |   C |    60 | 18.3 |        
   31448 | 2021-04-21 19:38:23 |      MASTER-Tavrida | (17h 57m 51.12s , +56d 10m 48.9s) |   C |    60 | 18.2 |        
   31896 | 2021-04-21 19:45:50 |      MASTER-Tavrida | (17h 59m 46.37s , +54d 11m 29.5s) |   C |    60 | 18.4 |        
   31975 | 2021-04-21 19:47:10 |      MASTER-Tavrida | (18h 12m 02.85s , +56d 10m 20.7s) |   C |    60 | 18.3 |        
   32055 | 2021-04-21 19:48:29 |      MASTER-Tavrida | (18h 13m 28.58s , +60d 11m 08.2s) |   C |    60 | 18.4 |        
   32134 | 2021-04-21 19:49:48 |      MASTER-Tavrida | (18h 13m 24.56s , +54d 09m 33.7s) |   C |    60 | 18.6 |        
   32360 | 2021-04-21 19:53:34 |      MASTER-Tavrida | (18h 26m 19.17s , +56d 09m 54.0s) |   C |    60 | 17.8 |        
   32756 | 2021-04-21 20:00:11 |      MASTER-Tavrida | (18h 29m 26.83s , +60d 08m 56.7s) |   C |    60 | 18.5 |        
   32836 | 2021-04-21 20:01:30 |      MASTER-Tavrida | (18h 26m 50.29s , +54d 09m 17.4s) |   C |    60 | 18.0 |        
   33075 | 2021-04-21 20:05:29 |      MASTER-Tavrida | (17h 56m 50.55s , +58d 10m 41.4s) |   C |    60 | 18.4 |        
   33234 | 2021-04-21 20:08:08 |      MASTER-Tavrida | (18h 11m 55.33s , +58d 09m 55.8s) |   C |    60 | 18.4 |        
   33313 | 2021-04-21 20:09:27 |      MASTER-Tavrida | (17h 57m 32.92s , +56d 11m 14.7s) |   C |    60 | 18.2 |        
   33472 | 2021-04-21 20:12:06 |      MASTER-Tavrida | (17h 43m 17.47s , +56d 11m 50.6s) |   C |    60 | 18.4 |        
   33551 | 2021-04-21 20:13:26 |      MASTER-Tavrida | (17h 41m 34.06s , +58d 10m 58.4s) |   C |    60 | 18.4 |        
   33710 | 2021-04-21 20:16:05 |      MASTER-Tavrida | (17h 57m 15.81s , +60d 12m 03.7s) |   C |    60 | 18.4 |        
   34027 | 2021-04-21 20:21:21 |      MASTER-Tavrida | (17h 59m 23.94s , +54d 12m 22.2s) |   C |    60 | 18.4 |        
   34186 | 2021-04-21 20:24:00 |      MASTER-Tavrida | (18h 11m 45.24s , +56d 09m 55.2s) |   C |    60 | 18.5 |        
   34345 | 2021-04-21 20:26:39 |      MASTER-Tavrida | (18h 13m 12.01s , +60d 11m 44.6s) |   C |    60 | 18.5 |        
   34503 | 2021-04-21 20:29:18 |      MASTER-Tavrida | (18h 13m 01.88s , +54d 11m 51.7s) |   C |    60 | 18.6 |        
   34583 | 2021-04-21 20:30:37 |      MASTER-Tavrida | (18h 26m 53.15s , +58d 09m 21.0s) |   C |    60 | 18.4 |        
   34662 | 2021-04-21 20:31:56 |      MASTER-Tavrida | (18h 26m 10.61s , +56d 09m 43.7s) |   C |    60 | 18.0 |        
   35059 | 2021-04-21 20:38:33 |      MASTER-Tavrida | (18h 29m 09.17s , +60d 11m 23.0s) |   C |    60 | 18.6 |        
   35138 | 2021-04-21 20:39:52 |      MASTER-Tavrida | (18h 26m 44.65s , +54d 10m 24.1s) |   C |    60 | 18.1 |        
   35377 | 2021-04-21 20:43:51 |      MASTER-Tavrida | (17h 56m 36.85s , +58d 12m 18.5s) |   C |    60 | 18.6 |        
   35535 | 2021-04-21 20:46:30 |      MASTER-Tavrida | (18h 11m 46.88s , +58d 11m 53.1s) |   C |    60 | 18.4 |        
   35615 | 2021-04-21 20:47:49 |      MASTER-Tavrida | (17h 57m 21.76s , +56d 11m 39.5s) |   C |    60 | 18.4 |        
   35773 | 2021-04-21 20:50:28 |      MASTER-Tavrida | (17h 43m 06.79s , +56d 12m 11.7s) |   C |    60 | 18.4 |        
   35853 | 2021-04-21 20:51:47 |      MASTER-Tavrida | (17h 41m 24.15s , +58d 11m 19.8s) |   C |    60 | 18.5 |        
   36011 | 2021-04-21 20:54:25 |      MASTER-Tavrida | (17h 57m 04.05s , +60d 12m 36.6s) |   C |    60 | 18.6 |        
   36255 | 2021-04-21 20:58:30 |      MASTER-Tavrida | (17h 59m 19.74s , +54d 11m 35.9s) |   C |    60 | 18.7 |        
   36414 | 2021-04-21 21:01:08 |      MASTER-Tavrida | (18h 11m 46.37s , +56d 11m 13.0s) |   C |    60 | 18.6 |        
   36573 | 2021-04-21 21:03:47 |      MASTER-Tavrida | (18h 13m 07.72s , +60d 10m 34.5s) |   C |    60 | 18.7 |        
   36732 | 2021-04-21 21:06:26 |      MASTER-Tavrida | (18h 12m 59.69s , +54d 10m 28.4s) |   C |    60 | 18.7 |        
   36811 | 2021-04-21 21:07:46 |      MASTER-Tavrida | (18h 26m 53.41s , +58d 11m 36.8s) |   C |    60 | 18.5 |        
   36891 | 2021-04-21 21:09:05 |      MASTER-Tavrida | (18h 25m 59.10s , +56d 10m 44.0s) |   C |    60 | 18.3 |        
   37288 | 2021-04-21 21:15:42 |      MASTER-Tavrida | (18h 29m 05.94s , +60d 11m 31.7s) |   C |    60 | 18.6 |        
   37368 | 2021-04-21 21:17:02 |      MASTER-Tavrida | (18h 26m 36.98s , +54d 10m 00.4s) |   C |    60 | 18.3 |        
   37766 | 2021-04-21 21:23:40 |      MASTER-Tavrida | (17h 42m 56.48s , +56d 11m 20.3s) |   C |    60 | 18.6 |        
   37845 | 2021-04-21 21:24:59 |      MASTER-Tavrida | (17h 41m 25.34s , +58d 11m 46.4s) |   C |    60 | 18.8 |        
  118949 | 2021-04-22 19:56:44 |      MASTER-Tavrida | (18h 11m 50.96s , +58d 11m 34.5s) |   C |    60 | 18.3 |        
  119513 | 2021-04-22 20:06:08 |      MASTER-Tavrida | (17h 57m 27.57s , +56d 12m 17.4s) |   C |    60 | 18.2 |        
  119593 | 2021-04-22 20:07:27 |      MASTER-Tavrida | (18h 11m 54.52s , +56d 10m 43.8s) |   C |    60 | 18.4 |        
  119672 | 2021-04-22 20:08:46 |      MASTER-Tavrida | (17h 56m 40.61s , +58d 10m 26.0s) |   C |    60 | 18.3 |        
  119898 | 2021-04-22 20:12:33 |      MASTER-Tavrida | (18h 13m 13.64s , +60d 11m 39.2s) |   C |    60 | 18.3 |        
  119978 | 2021-04-22 20:13:52 |      MASTER-Tavrida | (17h 59m 27.47s , +54d 10m 08.9s) |   C |    60 | 18.4 |        
  120057 | 2021-04-22 20:15:12 |      MASTER-Tavrida | (18h 11m 56.92s , +58d 09m 45.8s) |   C |    60 | 18.2 |        
  120137 | 2021-04-22 20:16:31 |      MASTER-Tavrida | (18h 13m 09.33s , +54d 11m 38.1s) |   C |    60 | 18.5 |        
  120216 | 2021-04-22 20:17:50 |      MASTER-Tavrida | (18h 27m 03.29s , +58d 10m 39.1s) |   C |    60 | 18.3 |        
  120375 | 2021-04-22 20:20:30 |      MASTER-Tavrida | (18h 26m 15.69s , +56d 10m 10.8s) |   C |    60 | 17.8 |        
  120534 | 2021-04-22 20:23:08 |      MASTER-Tavrida | (17h 57m 34.84s , +56d 10m 30.7s) |   C |    60 | 18.1 |        
  120613 | 2021-04-22 20:24:28 |      MASTER-Tavrida | (18h 11m 51.81s , +56d 11m 24.9s) |   C |    60 | 18.3 |        
  120693 | 2021-04-22 20:25:47 |      MASTER-Tavrida | (17h 56m 43.31s , +58d 10m 51.7s) |   C |    60 | 18.2 |        
  120773 | 2021-04-22 20:27:07 |      MASTER-Tavrida | (17h 57m 16.17s , +60d 12m 29.5s) |   C |    60 | 18.3 |        
  120853 | 2021-04-22 20:28:27 |      MASTER-Tavrida | (18h 13m 12.55s , +60d 10m 55.9s) |   C |    60 | 18.4 |        
  120932 | 2021-04-22 20:29:47 |      MASTER-Tavrida | (17h 59m 25.55s , +54d 12m 21.0s) |   C |    60 | 18.4 |        
  121012 | 2021-04-22 20:31:06 |      MASTER-Tavrida | (18h 11m 52.96s , +58d 10m 58.6s) |   C |    60 | 18.3 |        
  121091 | 2021-04-22 20:32:25 |      MASTER-Tavrida | (18h 13m 04.06s , +54d 09m 50.0s) |   C |    60 | 18.4 |        
  121171 | 2021-04-22 20:33:45 |      MASTER-Tavrida | (18h 27m 02.08s , +58d 09m 25.8s) |   C |    60 | 18.3 |        
  121330 | 2021-04-22 20:36:24 |      MASTER-Tavrida | (18h 26m 11.33s , +56d 09m 37.1s) |   C |    60 | 18.0 |        
  121489 | 2021-04-22 20:39:03 |      MASTER-Tavrida | (17h 57m 25.47s , +56d 11m 34.1s) |   C |    60 | 18.2 |        
  121568 | 2021-04-22 20:40:22 |      MASTER-Tavrida | (18h 11m 46.09s , +56d 12m 01.5s) |   C |    60 | 18.5 |        
  121793 | 2021-04-22 20:44:08 |      MASTER-Tavrida | (17h 43m 05.59s , +56d 13m 08.5s) |   C |    60 | 18.3 |        
  121873 | 2021-04-22 20:45:27 |      MASTER-Tavrida | (17h 57m 12.80s , +60d 11m 46.2s) |   C |    60 | 18.4 |        
  121952 | 2021-04-22 20:46:46 |      MASTER-Tavrida | (18h 13m 08.92s , +60d 10m 09.0s) |   C |    60 | 18.4 |        
  122032 | 2021-04-22 20:48:06 |      MASTER-Tavrida | (17h 59m 29.28s , +54d 10m 34.3s) |   C |    60 | 18.3 |        
  122111 | 2021-04-22 20:49:25 |      MASTER-Tavrida | (18h 13m 05.34s , +54d 11m 32.0s) |   C |    60 | 18.5 |        
  122191 | 2021-04-22 20:50:45 |      MASTER-Tavrida | (18h 26m 55.87s , +58d 09m 47.0s) |   C |    60 | 18.2 |        
  122349 | 2021-04-22 20:53:23 |      MASTER-Tavrida | (18h 26m 04.92s , +56d 10m 34.9s) |   C |    60 | 17.8 |        
  122720 | 2021-04-22 20:59:34 |      MASTER-Tavrida | (17h 41m 26.57s , +58d 13m 21.5s) |   C |    60 | 18.5 |        
  122878 | 2021-04-22 21:02:13 |      MASTER-Tavrida | (17h 43m 01.22s , +56d 11m 14.3s) |   C |    60 | 18.4 |        
  123275 | 2021-04-22 21:08:49 |      MASTER-Tavrida | (18h 29m 07.35s , +60d 09m 44.6s) |   C |    60 | 18.5 |        
  123741 | 2021-04-22 21:16:36 |      MASTER-Tavrida | (17h 41m 24.65s , +58d 11m 26.4s) |   C |    60 | 18.5 |        
  123900 | 2021-04-22 21:19:15 |      MASTER-Tavrida | (17h 43m 04.10s , +56d 13m 13.8s) |   C |    60 | 18.3 |        
  124309 | 2021-04-22 21:26:03 |      MASTER-Tavrida | (18h 29m 13.80s , +60d 10m 54.7s) |   C |    60 | 18.5 |        
  124468 | 2021-04-22 21:28:42 |      MASTER-Tavrida | (18h 26m 43.04s , +54d 09m 51.4s) |   C |    60 | 18.1 |        
  124701 | 2021-04-22 21:32:35 |      MASTER-Tavrida | (17h 41m 27.84s , +58d 13m 09.2s) |   C |    60 | 18.5 |        
  125328 | 2021-04-22 21:43:03 |      MASTER-Tavrida | (18h 29m 06.71s , +60d 10m 11.0s) |   C |    60 | 18.6 |        
  125487 | 2021-04-22 21:45:41 |      MASTER-Tavrida | (18h 26m 35.24s , +54d 10m 52.3s) |   C |    60 | 17.9 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4124
TYPE = 35
DAYS = 1


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210421B ( Fermi GBM team, GCN 29870) errorbox  63 sec after notice time and 29500 sec after trigger time at 2021-04-21 19:06:25 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b = 28 deg., longitude l = 86 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1598312

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   29590 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.66s , +57d 18m 06.1s) |   C |   180 | 18.5 |        
   29770 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.68s , +57d 18m 05.9s) |   C |   540 | 19.2 |  Coadd 
   29790 | 2021-04-21 19:09:44 |      MASTER-Tavrida | (18h 06m 04.40s , +57d 18m 11.5s) |   C |   180 | 18.5 |        
   29989 | 2021-04-21 19:13:04 |      MASTER-Tavrida | (18h 06m 00.51s , +57d 19m 50.6s) |   C |   180 | 18.7 |        
   30189 | 2021-04-21 19:16:23 |      MASTER-Tavrida | (18h 06m 00.35s , +57d 18m 29.6s) |   C |   180 | 18.5 |        
   31289 | 2021-04-21 19:35:43 |      MASTER-Tavrida | (17h 57m 00.62s , +58d 10m 22.7s) |   C |    60 | 18.1 |        
   31369 | 2021-04-21 19:37:03 |      MASTER-Tavrida | (18h 12m 11.20s , +58d 11m 01.8s) |   C |    60 | 18.3 |        
   31448 | 2021-04-21 19:38:23 |      MASTER-Tavrida | (17h 57m 51.12s , +56d 10m 48.9s) |   C |    60 | 18.2 |        
   31896 | 2021-04-21 19:45:50 |      MASTER-Tavrida | (17h 59m 46.37s , +54d 11m 29.5s) |   C |    60 | 18.4 |        
   31975 | 2021-04-21 19:47:10 |      MASTER-Tavrida | (18h 12m 02.85s , +56d 10m 20.7s) |   C |    60 | 18.3 |        
   32055 | 2021-04-21 19:48:29 |      MASTER-Tavrida | (18h 13m 28.58s , +60d 11m 08.2s) |   C |    60 | 18.4 |        
   32134 | 2021-04-21 19:49:48 |      MASTER-Tavrida | (18h 13m 24.56s , +54d 09m 33.7s) |   C |    60 | 18.6 |        
   32360 | 2021-04-21 19:53:34 |      MASTER-Tavrida | (18h 26m 19.17s , +56d 09m 54.0s) |   C |    60 | 17.8 |        
   32756 | 2021-04-21 20:00:11 |      MASTER-Tavrida | (18h 29m 26.83s , +60d 08m 56.7s) |   C |    60 | 18.5 |        
   32836 | 2021-04-21 20:01:30 |      MASTER-Tavrida | (18h 26m 50.29s , +54d 09m 17.4s) |   C |    60 | 18.0 |        
   33075 | 2021-04-21 20:05:29 |      MASTER-Tavrida | (17h 56m 50.55s , +58d 10m 41.4s) |   C |    60 | 18.4 |        
   33234 | 2021-04-21 20:08:08 |      MASTER-Tavrida | (18h 11m 55.33s , +58d 09m 55.8s) |   C |    60 | 18.4 |        
   33313 | 2021-04-21 20:09:27 |      MASTER-Tavrida | (17h 57m 32.92s , +56d 11m 14.7s) |   C |    60 | 18.2 |        
   33472 | 2021-04-21 20:12:06 |      MASTER-Tavrida | (17h 43m 17.47s , +56d 11m 50.6s) |   C |    60 | 18.4 |        
   33551 | 2021-04-21 20:13:26 |      MASTER-Tavrida | (17h 41m 34.06s , +58d 10m 58.4s) |   C |    60 | 18.4 |        
   33710 | 2021-04-21 20:16:05 |      MASTER-Tavrida | (17h 57m 15.81s , +60d 12m 03.7s) |   C |    60 | 18.4 |        
   34027 | 2021-04-21 20:21:21 |      MASTER-Tavrida | (17h 59m 23.94s , +54d 12m 22.2s) |   C |    60 | 18.4 |        
   34186 | 2021-04-21 20:24:00 |      MASTER-Tavrida | (18h 11m 45.24s , +56d 09m 55.2s) |   C |    60 | 18.5 |        
   34345 | 2021-04-21 20:26:39 |      MASTER-Tavrida | (18h 13m 12.01s , +60d 11m 44.6s) |   C |    60 | 18.5 |        
   34503 | 2021-04-21 20:29:18 |      MASTER-Tavrida | (18h 13m 01.88s , +54d 11m 51.7s) |   C |    60 | 18.6 |        
   34583 | 2021-04-21 20:30:37 |      MASTER-Tavrida | (18h 26m 53.15s , +58d 09m 21.0s) |   C |    60 | 18.4 |        
   34662 | 2021-04-21 20:31:56 |      MASTER-Tavrida | (18h 26m 10.61s , +56d 09m 43.7s) |   C |    60 | 18.0 |        
   35059 | 2021-04-21 20:38:33 |      MASTER-Tavrida | (18h 29m 09.17s , +60d 11m 23.0s) |   C |    60 | 18.6 |        
   35138 | 2021-04-21 20:39:52 |      MASTER-Tavrida | (18h 26m 44.65s , +54d 10m 24.1s) |   C |    60 | 18.1 |        
   35377 | 2021-04-21 20:43:51 |      MASTER-Tavrida | (17h 56m 36.85s , +58d 12m 18.5s) |   C |    60 | 18.6 |        
   35535 | 2021-04-21 20:46:30 |      MASTER-Tavrida | (18h 11m 46.88s , +58d 11m 53.1s) |   C |    60 | 18.4 |        
   35615 | 2021-04-21 20:47:49 |      MASTER-Tavrida | (17h 57m 21.76s , +56d 11m 39.5s) |   C |    60 | 18.4 |        
   35773 | 2021-04-21 20:50:28 |      MASTER-Tavrida | (17h 43m 06.79s , +56d 12m 11.7s) |   C |    60 | 18.4 |        
   35853 | 2021-04-21 20:51:47 |      MASTER-Tavrida | (17h 41m 24.15s , +58d 11m 19.8s) |   C |    60 | 18.5 |        
   36011 | 2021-04-21 20:54:25 |      MASTER-Tavrida | (17h 57m 04.05s , +60d 12m 36.6s) |   C |    60 | 18.6 |        
   36255 | 2021-04-21 20:58:30 |      MASTER-Tavrida | (17h 59m 19.74s , +54d 11m 35.9s) |   C |    60 | 18.7 |        
   36414 | 2021-04-21 21:01:08 |      MASTER-Tavrida | (18h 11m 46.37s , +56d 11m 13.0s) |   C |    60 | 18.6 |        
   36573 | 2021-04-21 21:03:47 |      MASTER-Tavrida | (18h 13m 07.72s , +60d 10m 34.5s) |   C |    60 | 18.7 |        
   36732 | 2021-04-21 21:06:26 |      MASTER-Tavrida | (18h 12m 59.69s , +54d 10m 28.4s) |   C |    60 | 18.7 |        
   36811 | 2021-04-21 21:07:46 |      MASTER-Tavrida | (18h 26m 53.41s , +58d 11m 36.8s) |   C |    60 | 18.5 |        
   36891 | 2021-04-21 21:09:05 |      MASTER-Tavrida | (18h 25m 59.10s , +56d 10m 44.0s) |   C |    60 | 18.3 |        
   37288 | 2021-04-21 21:15:42 |      MASTER-Tavrida | (18h 29m 05.94s , +60d 11m 31.7s) |   C |    60 | 18.6 |        
   37368 | 2021-04-21 21:17:02 |      MASTER-Tavrida | (18h 26m 36.98s , +54d 10m 00.4s) |   C |    60 | 18.3 |        
   37766 | 2021-04-21 21:23:40 |      MASTER-Tavrida | (17h 42m 56.48s , +56d 11m 20.3s) |   C |    60 | 18.6 |        
   37845 | 2021-04-21 21:24:59 |      MASTER-Tavrida | (17h 41m 25.34s , +58d 11m 46.4s) |   C |    60 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4117
TYPE = 35
DAYS = 0


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB210421.45 (trigger No 640695289,18h 08m 19.20s , +57d 09m 00.0s, R=2.13) errorbox  63 sec after notice time and 29500 sec after trigger time at 2021-04-21 19:06:25 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b = 28 deg., longitude l = 86 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1598312

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   29590 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.66s , +57d 18m 06.1s) |   C |   180 | 18.5 |        
   29770 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.68s , +57d 18m 05.9s) |   C |   540 | 19.2 |  Coadd 
   29790 | 2021-04-21 19:09:44 |      MASTER-Tavrida | (18h 06m 04.40s , +57d 18m 11.5s) |   C |   180 | 18.5 |        
   29989 | 2021-04-21 19:13:04 |      MASTER-Tavrida | (18h 06m 00.51s , +57d 19m 50.6s) |   C |   180 | 18.7 |        
   30189 | 2021-04-21 19:16:23 |      MASTER-Tavrida | (18h 06m 00.35s , +57d 18m 29.6s) |   C |   180 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4116
TYPE = 35
DAYS = 0


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB210421.45 (trigger No 640695289,18h 08m 19.20s , +57d 09m 00.0s, R=2.13) errorbox  63 sec after notice time and 29500 sec after trigger time at 2021-04-21 19:06:25 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b = 28 deg., longitude l = 86 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1598312

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   29590 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.66s , +57d 18m 06.1s) |   C |   180 | 18.5 |        
   29770 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.68s , +57d 18m 05.9s) |   C |   540 | 19.2 |  Coadd 
   29790 | 2021-04-21 19:09:44 |      MASTER-Tavrida | (18h 06m 04.40s , +57d 18m 11.5s) |   C |   180 | 18.5 |        
   29989 | 2021-04-21 19:13:04 |      MASTER-Tavrida | (18h 06m 00.51s , +57d 19m 50.6s) |   C |   180 | 18.7 |        
   30189 | 2021-04-21 19:16:23 |      MASTER-Tavrida | (18h 06m 00.35s , +57d 18m 29.6s) |   C |   180 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4115
TYPE = 34
DAYS = 0


MASTER-Tavrida robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB210421.45 (trigger No 640695289,18h 08m 19.20s , +57d 09m 00.0s, R=2.13) errorbox  63 sec after notice time and 29500 sec after trigger time at 2021-04-21 19:06:25 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 59 deg. The sun  altitude  is -23.8 deg. 

The galactic latitude b = 28 deg., longitude l = 86 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1598312

We obtain a following upper limits.  

Tmid-T0  |      Date Time      |          Site       |             Coord (J2000)          |Filt.| Expt. | Limit| Comment
_________|_____________________|_____________________|____________________________________|_____|_______|_______|________

   29590 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.66s , +57d 18m 06.1s) |   C |   180 | 18.5 |        
   29770 | 2021-04-21 19:06:25 |      MASTER-Tavrida | (18h 05m 57.68s , +57d 18m 05.9s) |   C |   540 | 19.2 |  Coadd 
   29790 | 2021-04-21 19:09:44 |      MASTER-Tavrida | (18h 06m 04.40s , +57d 18m 11.5s) |   C |   180 | 18.5 |        
   29989 | 2021-04-21 19:13:04 |      MASTER-Tavrida | (18h 06m 00.51s , +57d 19m 50.6s) |   C |   180 | 18.7 |        
   30189 | 2021-04-21 19:16:23 |      MASTER-Tavrida | (18h 06m 00.35s , +57d 18m 29.6s) |   C |   180 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025