MASTER Net MASTER Database: GRB210419.88 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 GRB210419.88
Trignum 640559433
Trigger time 2021-04-19 21:10:28.45
Notice time 2021-04-19 21:11:09.00361
Coord, eb (20h 26m 52.08s , +03d 06m 00.0s) , 14.72
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You are viewing outdated information, relevant error box is here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
1596176 2021-04-19 21:19:56.717828 20h 28m 24.00s -00d 07m 12.0s FERMI 1.36 alert 640559433 2 115 alert
1596169 2021-04-19 21:12:30.994594 20h 28m 04.80s +00d 04m 12.0s FERMI 1.3 alert 640559433 7 112 alert
1596149 2021-04-19 21:11:09.00361 20h 26m 52.08s +03d 06m 00.0s FERMI 14.72 alert 640559433 18 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
49.2 2021-04-19 21:10:14.867 17h 55m 00.00s +37d 58m 06.0s Tunka 100628 Database Tunka
45.8 2021-04-19 21:07:34.727 18h 16m 28.00s +37d 57m 03.0s Tunka 100629 Database Tunka
150.4 2021-04-19 21:09:57.142 08h 07m 02.00s +26d 06m 23.0s IAC 111343 Database IAC
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-04-19 21:10:28 (JD 2459324.382269)

Siderial time 13.561558 h

Ra 20:26:52.08 Dec 03:06:00.00
(306.717000d, 3.100000d)

Rise 2021-04-20 21:37:19

Transit 2021-04-20 04:02:31

Set 2021-04-20 10:23:46

Amur

Object: Altitude: 41.44 Azimuth: 341.98

Sun: Altitude: 5.98 Azimuth: 259.37

Moon: Altitude: -14.91 Azimuth: 175.91

Tunka

Object: Altitude: 32.01 Azimuth: 313.74

Sun: Altitude: -7.86 Azimuth: 240.16

Moon: Altitude: -9.47 Azimuth: 153.68

Kislovodsk

Object: Altitude: -3.89 Azimuth: 261.95

Sun: Altitude: -34.87 Azimuth: 180.81

Moon: Altitude: 16.30 Azimuth: 108.78

Tavrida

Object: Altitude: -9.68 Azimuth: 255.75

Sun: Altitude: -33.44 Azimuth: 170.79

Moon: Altitude: 22.43 Azimuth: 103.10

SAAO

Object: Altitude: -26.86 Azimuth: 284.44

Sun: Altitude: -61.45 Azimuth: 47.42

Moon: Altitude: 2.97 Azimuth: 121.86

IAC

Object: Altitude: -51.83 Azimuth: 218.34

Sun: Altitude: -21.06 Azimuth: 116.58

Moon: Altitude: 61.52 Azimuth: 90.09

Argentina

Object: Altitude: -49.61 Azimuth: 50.90

Sun: Altitude: 11.36 Azimuth: 111.19

Moon: Altitude: 30.02 Azimuth: 202.27

Mexico

Object: Altitude: -14.27 Azimuth: 102.60

Sun: Altitude: 57.66 Azimuth: 58.63

Moon: Altitude: 35.32 Azimuth: 260.19

Ural

Object: Altitude: 7.29 Azimuth: 275.57

Sun: Altitude: -20.04 Azimuth: 198.49

Moon: Altitude: 11.52 Azimuth: 117.93

Vostryakovo

Object: Altitude: -4.82 Azimuth: 257.42

Sun: Altitude: -23.15 Azimuth: 175.69

Moon: Altitude: 22.32 Azimuth: 101.51

Gal. latitude: -20.015878 Gal. longitude: 47.693898

Dist. to Sun: 80.510163

Dist. to Moon: 150.866157

Moon coord.: (117.641120 d, 24.667501 d)

Sun coord.: (27.653731 d, 11.379901 d)

Lunar disk: 0.459960

Lunar phase: 94.593181

Lunar bright limb: 280.371580

No SN in this field

2021-04-19 21:11:09 (JD 2459324.382743)

Siderial time 13.572978 h

Ra 20:26:52.08 Dec 03:06:00.00
(306.717000d, 3.100000d)

Rise 2021-04-20 21:37:19

Transit 2021-04-20 04:02:31

Set 2021-04-20 10:23:46

Amur

Object: Altitude: 41.47 Azimuth: 342.21

Sun: Altitude: 6.09 Azimuth: 259.50

Moon: Altitude: -14.92 Azimuth: 176.06

Tunka

Object: Altitude: 32.08 Azimuth: 313.92

Sun: Altitude: -7.77 Azimuth: 240.30

Moon: Altitude: -9.51 Azimuth: 153.82

Kislovodsk

Object: Altitude: -3.77 Azimuth: 262.07

Sun: Altitude: -34.87 Azimuth: 181.01

Moon: Altitude: 16.19 Azimuth: 108.89

Tavrida

Object: Altitude: -9.56 Azimuth: 255.88

Sun: Altitude: -33.46 Azimuth: 170.99

Moon: Altitude: 22.32 Azimuth: 103.20

SAAO

Object: Altitude: -26.72 Azimuth: 284.33

Sun: Altitude: -61.56 Azimuth: 47.15

Moon: Altitude: 2.85 Azimuth: 121.76

IAC

Object: Altitude: -51.73 Azimuth: 218.57

Sun: Altitude: -21.19 Azimuth: 116.69

Moon: Altitude: 61.37 Azimuth: 90.16

Argentina

Object: Altitude: -49.72 Azimuth: 50.70

Sun: Altitude: 11.22 Azimuth: 111.09

Moon: Altitude: 30.07 Azimuth: 202.10

Mexico

Object: Altitude: -14.41 Azimuth: 102.70

Sun: Altitude: 57.54 Azimuth: 58.84

Moon: Altitude: 35.46 Azimuth: 260.26

Ural

Object: Altitude: 7.38 Azimuth: 275.72

Sun: Altitude: -20.01 Azimuth: 198.67

Moon: Altitude: 11.44 Azimuth: 118.06

Vostryakovo

Object: Altitude: -4.73 Azimuth: 257.56

Sun: Altitude: -23.16 Azimuth: 175.88

Moon: Altitude: 22.22 Azimuth: 101.64

Gal. latitude: -20.015878 Gal. longitude: 47.693898

Dist. to Sun: 80.510593

Dist. to Moon: 150.868736

Moon coord.: (117.647596 d, 24.666787 d)

Sun coord.: (27.654173 d, 11.380064 d)

Lunar disk: 0.460007

Lunar phase: 94.587730

Lunar bright limb: 280.374224

No SN in this field

2021-04-19 22:11:09 (JD 2459324.424410)

Siderial time 14.575716 h

Ra 20:26:52.08 Dec 03:06:00.00
(306.717000d, 3.100000d)

Rise 2021-04-20 21:37:19

Transit 2021-04-20 04:02:31

Set 2021-04-20 10:23:46

Amur

Object: Altitude: 42.76 Azimuth: 2.43

Sun: Altitude: 15.63 Azimuth: 270.91

Moon: Altitude: -14.53 Azimuth: 189.65

Tunka

Object: Altitude: 37.76 Azimuth: 330.92

Sun: Altitude: 0.73 Azimuth: 252.33

Moon: Altitude: -12.59 Azimuth: 166.85

Kislovodsk

Object: Altitude: 7.07 Azimuth: 272.48

Sun: Altitude: -33.00 Azimuth: 198.61

Moon: Altitude: 6.56 Azimuth: 118.03

Tavrida

Object: Altitude: 0.99 Azimuth: 266.61

Sun: Altitude: -33.48 Azimuth: 188.64

Moon: Altitude: 12.49 Azimuth: 112.38

SAAO

Object: Altitude: -14.22 Azimuth: 275.43

Sun: Altitude: -68.33 Azimuth: 15.74

Moon: Altitude: -7.90 Azimuth: 114.18

IAC

Object: Altitude: -42.00 Azimuth: 235.42

Sun: Altitude: -32.39 Azimuth: 127.39

Moon: Altitude: 48.64 Azimuth: 95.97

Argentina

Object: Altitude: -58.01 Azimuth: 29.25

Sun: Altitude: -0.97 Azimuth: 102.82

Moon: Altitude: 33.25 Azimuth: 187.10

Mexico

Object: Altitude: -26.71 Azimuth: 111.94

Sun: Altitude: 45.78 Azimuth: 73.26

Moon: Altitude: 47.74 Azimuth: 266.56

Ural

Object: Altitude: 15.37 Azimuth: 288.70

Sun: Altitude: -16.39 Azimuth: 213.68

Moon: Altitude: 4.86 Azimuth: 129.56

Vostryakovo

Object: Altitude: 3.75 Azimuth: 269.97

Sun: Altitude: -22.57 Azimuth: 191.83

Moon: Altitude: 14.33 Azimuth: 112.73

Gal. latitude: -20.015878 Gal. longitude: 47.693898

Dist. to Sun: 80.548338

Dist. to Moon: 151.091769

Moon coord.: (118.216257 d, 24.603017 d)

Sun coord.: (27.693013 d, 11.394396 d)

Lunar disk: 0.464175

Lunar phase: 94.108816

Lunar bright limb: 280.606204

No SN in this field

2025-03-12 23:17:16 (JD 2460747.470324)

Siderial time 13.185758 h

Ra 20:26:52.08 Dec 03:06:00.00
(306.717000d, 3.100000d)

Rise 2025-03-13 00:10:33

Transit 2025-03-13 06:31:48

Set 2025-03-13 12:53:03

Amur

Object: Altitude: 40.11 Azimuth: 334.76

Sun: Altitude: 13.04 Azimuth: 291.42

Moon: Altitude: -14.23 Azimuth: 126.65

Tunka

Object: Altitude: 29.37 Azimuth: 307.96

Sun: Altitude: -2.21 Azimuth: 272.15

Moon: Altitude: 0.08 Azimuth: 106.85

Kislovodsk

Object: Altitude: -7.90 Azimuth: 257.97

Sun: Altitude: -41.53 Azimuth: 221.49

Moon: Altitude: 40.24 Azimuth: 61.11

Tavrida

Object: Altitude: -13.52 Azimuth: 251.55

Sun: Altitude: -44.32 Azimuth: 210.42

Moon: Altitude: 44.77 Azimuth: 51.31

SAAO

Object: Altitude: -31.43 Azimuth: 288.21

Sun: Altitude: -53.74 Azimuth: 346.29

Moon: Altitude: 42.73 Azimuth: 151.20

IAC

Object: Altitude: -54.63 Azimuth: 210.17

Sun: Altitude: -52.41 Azimuth: 126.87

Moon: Altitude: 66.49 Azimuth: 316.42

Argentina

Object: Altitude: -45.74 Azimuth: 56.97

Sun: Altitude: -5.10 Azimuth: 83.20

Moon: Altitude: 11.76 Azimuth: 249.77

Mexico

Object: Altitude: -9.53 Azimuth: 99.50

Sun: Altitude: 26.10 Azimuth: 68.63

Moon: Altitude: -11.35 Azimuth: 250.40

Ural

Object: Altitude: 4.23 Azimuth: 270.82

Sun: Altitude: -24.63 Azimuth: 233.20

Moon: Altitude: 24.86 Azimuth: 69.56

Vostryakovo

Object: Altitude: -7.92 Azimuth: 252.69

Sun: Altitude: -33.91 Azimuth: 210.65

Moon: Altitude: 36.03 Azimuth: 48.61

Gal. latitude: -20.015878 Gal. longitude: 47.693898

Dist. to Sun: 46.582052

Dist. to Moon: 144.322622

Moon coord.: (159.894432 d, 10.385615 d)

Sun coord.: (352.912074 d, -3.063083 d)

Lunar disk: 0.983404

Lunar phase: 14.803509

Lunar bright limb: 298.637729

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4118
TYPE = 35
DAYS = 2


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 210419B ( Fermi GBM team, GCN 29831) errorbox  8248 sec after notice time and 8274 sec after trigger time at 2021-04-19 23:28:23 UT, with upper limit up to  16.1 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -27.1 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 210419B errorbox  20965 sec after notice time and 20992 sec after trigger time at 2021-04-20 03:00:20 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 45 deg. The sun  altitude  is -26.6 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the FERMI GRB 210419B errorbox  25544 sec after notice time and 25571 sec after trigger time at 2021-04-20 04:16:39 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 53 deg. The sun  altitude  is -28.5 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 210419B errorbox  32096 sec after notice time and 32122 sec after trigger time at 2021-04-20 06:05:51 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -61.1 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210419B errorbox  1 days 11960 sec after notice time and 1 days 11987 sec after trigger time at 2021-04-21 00:30:15 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -22.4 deg. 

The galactic latitude b = -22 deg., longitude l = 45 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1596164

We obtain a following upper limits.  

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

    8305 | 2021-04-19 23:28:23 |   MASTER-Kislovodsk | (20h 27m 02.66s , +00d 07m 45.8s) |   C |    60 | 13.7 |        
    8543 | 2021-04-19 23:32:21 |   MASTER-Kislovodsk | (20h 19m 02.82s , +00d 06m 53.2s) |   C |    60 | 16.1 |        
    8860 | 2021-04-19 23:37:38 |   MASTER-Kislovodsk | (20h 19m 55.36s , +02d 08m 29.6s) |   C |    60 | 14.7 |        
    8940 | 2021-04-19 23:38:58 |   MASTER-Kislovodsk | (20h 27m 46.29s , -01d 51m 11.2s) |   C |    60 | 14.2 |        
    9257 | 2021-04-19 23:44:15 |   MASTER-Kislovodsk | (20h 27m 02.09s , +00d 07m 54.1s) |   C |    60 | 15.1 |        
    9337 | 2021-04-19 23:45:35 |   MASTER-Kislovodsk | (20h 35m 01.94s , +00d 08m 45.7s) |   C |    60 | 15.0 |        
    9496 | 2021-04-19 23:48:14 |   MASTER-Kislovodsk | (20h 19m 07.83s , +00d 07m 34.0s) |   C |    60 | 12.6 |        
   21022 | 2021-04-20 03:00:20 |         MASTER-SAAO | (20h 28m 11.36s , -00d 11m 13.5s) |   C |    60 | 19.2 |        
   21103 | 2021-04-20 03:01:41 |         MASTER-SAAO | (20h 28m 55.00s , -02d 12m 06.3s) |   C |    60 | 19.1 |        
   21182 | 2021-04-20 03:03:00 |         MASTER-SAAO | (20h 28m 53.69s , +01d 47m 56.8s) |   C |    60 | 19.2 |        
   25601 | 2021-04-20 04:16:39 |          MASTER-IAC | (20h 19m 19.80s , +01d 57m 55.7s) |   C |    60 | 18.6 |        
   25889 | 2021-04-20 04:21:27 |          MASTER-IAC | (20h 18m 35.75s , -00d 04m 15.2s) |   C |    60 | 18.8 |        
   26169 | 2021-04-20 04:26:07 |          MASTER-IAC | (20h 19m 22.19s , -02d 02m 17.7s) |   C |    60 | 18.7 |        
   26455 | 2021-04-20 04:30:53 |          MASTER-IAC | (20h 34m 41.49s , -00d 02m 50.3s) |   C |    60 | 19.1 |        
   26455 | 2021-04-20 04:30:53 |          MASTER-IAC | (20h 26m 35.96s , +00d 02m 35.6s) |   C |    60 | 18.6 |        
   26535 | 2021-04-20 04:32:13 |          MASTER-IAC | (20h 35m 18.89s , -02d 03m 40.6s) |   C |    60 | 18.9 |        
   26536 | 2021-04-20 04:32:13 |          MASTER-IAC | (20h 27m 13.04s , -01d 58m 15.1s) |   C |    60 | 18.5 |        
   26616 | 2021-04-20 04:33:34 |          MASTER-IAC | (20h 35m 21.29s , +01d 57m 20.3s) |   C |    60 | 19.1 |        
   26616 | 2021-04-20 04:33:34 |          MASTER-IAC | (20h 27m 15.20s , +02d 02m 47.8s) |   C |    60 | 18.5 |        
   27441 | 2021-04-20 04:47:19 |          MASTER-IAC | (20h 34m 34.59s , -00d 04m 29.3s) |   C |    60 | 19.0 |        
   27441 | 2021-04-20 04:47:19 |          MASTER-IAC | (20h 26m 28.68s , +00d 00m 53.4s) |   C |    60 | 18.5 |        
   27521 | 2021-04-20 04:48:39 |          MASTER-IAC | (20h 35m 25.71s , -02d 04m 28.8s) |   C |    60 | 18.9 |        
   27521 | 2021-04-20 04:48:39 |          MASTER-IAC | (20h 27m 19.51s , -01d 59m 06.4s) |   C |    60 | 18.4 |        
   27601 | 2021-04-20 04:49:59 |          MASTER-IAC | (20h 35m 24.49s , +01d 56m 58.9s) |   C |    60 | 19.1 |        
   27601 | 2021-04-20 04:49:59 |          MASTER-IAC | (20h 27m 18.12s , +02d 02m 22.2s) |   C |    60 | 18.5 |        
   29600 | 2021-04-20 05:23:18 |          MASTER-IAC | (20h 35m 23.68s , +01d 55m 30.2s) |   C |    60 | 19.1 |        
   29600 | 2021-04-20 05:23:18 |          MASTER-IAC | (20h 27m 18.28s , +02d 00m 47.3s) |   C |    60 | 18.5 |        
   32153 | 2021-04-20 06:05:51 |         MASTER-OAFA | (20h 26m 44.60s , -00d 44m 48.8s) |   C |    60 | 17.7 |        
   32232 | 2021-04-20 06:07:10 |         MASTER-OAFA | (20h 27m 30.46s , -02d 45m 36.8s) |   C |    60 | 17.6 |        
   32391 | 2021-04-20 06:09:49 |         MASTER-OAFA | (20h 27m 24.25s , +01d 15m 15.9s) |   C |    60 | 17.5 |        
   33713 | 2021-04-20 06:31:51 |         MASTER-OAFA | (20h 26m 42.81s , -00d 44m 05.2s) |   C |    60 | 18.0 |        
   33792 | 2021-04-20 06:33:10 |         MASTER-OAFA | (20h 34m 42.78s , -00d 45m 32.8s) |   C |    60 | 18.1 |        
   33872 | 2021-04-20 06:34:30 |         MASTER-OAFA | (20h 27m 30.23s , -02d 43m 56.9s) |   C |    60 | 17.9 |        
   34111 | 2021-04-20 06:38:29 |         MASTER-OAFA | (20h 18m 46.10s , -00d 44m 19.9s) |   C |    60 | 18.0 |        
   34191 | 2021-04-20 06:39:49 |         MASTER-OAFA | (20h 27m 26.53s , +01d 14m 26.6s) |   C |    60 | 18.0 |        
   34271 | 2021-04-20 06:41:08 |         MASTER-OAFA | (20h 35m 32.46s , +01d 14m 37.5s) |   C |    60 | 18.1 |        
   34430 | 2021-04-20 06:43:48 |         MASTER-OAFA | (20h 19m 29.45s , +01d 14m 44.7s) |   C |    60 | 17.9 |        
   34828 | 2021-04-20 06:50:25 |         MASTER-OAFA | (20h 26m 41.35s , -00d 45m 32.9s) |   C |    60 | 18.0 |        
   34907 | 2021-04-20 06:51:45 |         MASTER-OAFA | (20h 34m 46.15s , -00d 45m 32.2s) |   C |    60 | 18.1 |        
   34987 | 2021-04-20 06:53:05 |         MASTER-OAFA | (20h 27m 28.42s , -02d 43m 50.3s) |   C |    60 | 18.0 |        
   35227 | 2021-04-20 06:57:05 |         MASTER-OAFA | (20h 18m 41.74s , -00d 44m 21.4s) |   C |    60 | 18.0 |        
   35307 | 2021-04-20 06:58:25 |         MASTER-OAFA | (20h 27m 26.39s , +01d 16m 25.8s) |   C |    60 | 17.9 |        
   35387 | 2021-04-20 06:59:45 |         MASTER-OAFA | (20h 35m 32.28s , +01d 15m 12.7s) |   C |    60 | 18.1 |        
   35546 | 2021-04-20 07:02:24 |         MASTER-OAFA | (20h 19m 32.37s , +01d 14m 42.5s) |   C |    60 | 18.0 |        
   35845 | 2021-04-20 07:06:23 |         MASTER-OAFA | (20h 34m 48.51s , +01d 16m 12.7s) |   C |   180 | 18.8 |        
   36045 | 2021-04-20 07:09:43 |         MASTER-OAFA | (20h 34m 42.76s , +01d 15m 14.5s) |   C |   180 | 18.8 |        
   36244 | 2021-04-20 07:13:02 |         MASTER-OAFA | (20h 34m 41.42s , -02d 43m 45.4s) |   C |   180 | 18.5 |        
   36444 | 2021-04-20 07:16:22 |         MASTER-OAFA | (20h 34m 46.83s , -02d 44m 44.9s) |   C |   180 | 18.6 |        
   37043 | 2021-04-20 07:26:21 |         MASTER-OAFA | (20h 22m 45.11s , +01d 28m 14.4s) |   C |   180 | 18.5 |        
   37243 | 2021-04-20 07:29:41 |         MASTER-OAFA | (20h 22m 45.09s , +01d 26m 38.8s) |   C |   180 | 18.5 |        
   39994 | 2021-04-20 08:16:32 |         MASTER-OAFA | (20h 34m 51.84s , +00d 38m 04.9s) |   C |    60 | 18.1 |        
   40074 | 2021-04-20 08:17:52 |         MASTER-OAFA | (20h 35m 32.78s , -01d 20m 27.4s) |   C |    60 | 18.1 |        
   40154 | 2021-04-20 08:19:12 |         MASTER-OAFA | (20h 18m 49.00s , +00d 38m 28.4s) |   C |    60 | 17.9 |        
   40234 | 2021-04-20 08:20:32 |         MASTER-OAFA | (20h 35m 36.77s , +02d 39m 38.0s) |   C |    60 | 18.1 |        
   40394 | 2021-04-20 08:23:12 |         MASTER-OAFA | (20h 19m 30.60s , -01d 19m 40.2s) |   C |    60 | 17.9 |        
   98417 | 2021-04-21 00:30:15 |      MASTER-Tavrida | (20h 17m 36.80s , +00d 06m 22.7s) |   C |    60 | 14.0 |        
   98724 | 2021-04-21 00:35:22 |      MASTER-Tavrida | (20h 18m 16.02s , +02d 06m 17.4s) |   C |    60 | 15.6 |        
   99133 | 2021-04-21 00:42:11 |      MASTER-Tavrida | (20h 25m 29.34s , +00d 08m 01.4s) |   C |    60 | 15.5 |        
   99212 | 2021-04-21 00:43:30 |      MASTER-Tavrida | (20h 33m 35.71s , +00d 06m 45.9s) |   C |    60 | 15.3 |        
   99291 | 2021-04-21 00:44:49 |      MASTER-Tavrida | (20h 18m 12.45s , -01d 53m 47.6s) |   C |    60 | 14.5 |        
   99371 | 2021-04-21 00:46:09 |      MASTER-Tavrida | (20h 26m 19.78s , -01d 53m 38.7s) |   C |    60 | 12.5 |        
   99529 | 2021-04-21 00:48:47 |      MASTER-Tavrida | (20h 26m 17.74s , +02d 06m 06.5s) |   C |    60 | 16.9 |        
   99706 | 2021-04-21 00:51:44 |      MASTER-Tavrida | (20h 34m 15.14s , +02d 06m 47.6s) |   C |    60 | 16.8 |        
   99786 | 2021-04-21 00:53:04 |      MASTER-Tavrida | (20h 17m 29.99s , +00d 08m 14.2s) |   C |    60 | 17.1 |        
  100024 | 2021-04-21 00:57:02 |      MASTER-Tavrida | (20h 18m 20.82s , +02d 06m 44.9s) |   C |    60 | 17.5 |        
  100604 | 2021-04-21 01:06:42 |      MASTER-Tavrida | (20h 25m 37.81s , +00d 07m 06.5s) |   C |    60 | 17.7 |        
  100684 | 2021-04-21 01:08:02 |      MASTER-Tavrida | (20h 33m 32.91s , +00d 05m 54.2s) |   C |    60 | 17.6 |        
  100763 | 2021-04-21 01:09:21 |      MASTER-Tavrida | (20h 18m 22.20s , -01d 53m 43.6s) |   C |    60 | 17.5 |        
  100842 | 2021-04-21 01:10:40 |      MASTER-Tavrida | (20h 26m 19.11s , -01d 52m 18.2s) |   C |    60 | 17.4 |        
  100922 | 2021-04-21 01:12:00 |      MASTER-Tavrida | (20h 34m 19.63s , -01d 54m 07.0s) |   C |    60 | 17.4 |        
  101001 | 2021-04-21 01:13:19 |      MASTER-Tavrida | (20h 26m 24.58s , +02d 07m 45.6s) |   C |    60 | 17.6 |        
  101362 | 2021-04-21 01:19:20 |      MASTER-Tavrida | (20h 34m 25.01s , +02d 06m 55.7s) |   C |    60 | 18.0 |        
  101442 | 2021-04-21 01:20:40 |      MASTER-Tavrida | (20h 17m 32.43s , +00d 06m 14.9s) |   C |    60 | 17.9 |        
  101680 | 2021-04-21 01:24:38 |      MASTER-Tavrida | (20h 18m 20.89s , +02d 06m 25.4s) |   C |    60 | 17.8 |        
  101918 | 2021-04-21 01:28:36 |      MASTER-Tavrida | (20h 18m 17.64s , -01d 51m 53.8s) |   C |    60 | 17.5 |        
  110470 | 2021-04-21 03:51:08 |         MASTER-SAAO | (20h 28m 08.95s , -00d 11m 56.8s) |   C |    60 | 19.0 |        
  110652 | 2021-04-21 03:54:10 |         MASTER-SAAO | (20h 28m 55.49s , -02d 10m 59.1s) |   C |    60 | 18.9 |        
  110732 | 2021-04-21 03:55:30 |         MASTER-SAAO | (20h 28m 58.86s , +01d 48m 28.9s) |   C |    60 | 18.9 |        
  114101 | 2021-04-21 04:51:39 |          MASTER-IAC | (20h 26m 34.37s , +00d 01m 12.2s) |   C |    60 | 14.9 |        
  114263 | 2021-04-21 04:54:21 |          MASTER-IAC | (20h 27m 16.10s , -01d 58m 51.7s) |   C |    60 | 15.0 |        
  114343 | 2021-04-21 04:55:41 |          MASTER-IAC | (20h 27m 21.05s , +02d 02m 38.2s) |   C |    60 | 16.6 |        
  118831 | 2021-04-21 06:10:29 |         MASTER-OAFA | (20h 26m 38.91s , -00d 45m 19.7s) |   C |    60 | 17.2 |        
  119130 | 2021-04-21 06:15:28 |         MASTER-OAFA | (20h 34m 37.52s , -00d 44m 49.7s) |   C |    60 | 17.0 |        
  119215 | 2021-04-21 06:16:53 |         MASTER-OAFA | (20h 27m 28.52s , -02d 45m 20.4s) |   C |    60 | 17.1 |        
  119379 | 2021-04-21 06:19:37 |         MASTER-OAFA | (20h 27m 24.19s , +01d 16m 25.7s) |   C |    60 | 17.0 |        
  119539 | 2021-04-21 06:22:17 |         MASTER-OAFA | (20h 35m 28.93s , +01d 14m 39.2s) |   C |    60 | 17.0 |        
  119621 | 2021-04-21 06:23:39 |         MASTER-OAFA | (20h 18m 40.81s , -00d 43m 34.1s) |   C |    60 | 17.1 |        
  119780 | 2021-04-21 06:26:18 |         MASTER-OAFA | (20h 19m 28.58s , +01d 15m 37.6s) |   C |    60 | 17.1 |        
  119860 | 2021-04-21 06:27:38 |         MASTER-OAFA | (20h 26m 37.03s , -00d 45m 33.9s) |   C |    60 | 17.1 |        
  120098 | 2021-04-21 06:31:36 |         MASTER-OAFA | (20h 34m 43.99s , -00d 43m 48.1s) |   C |    60 | 17.3 |        
  120177 | 2021-04-21 06:32:55 |         MASTER-OAFA | (20h 27m 28.62s , -02d 44m 37.2s) |   C |    60 | 17.3 |        
  120336 | 2021-04-21 06:35:34 |         MASTER-OAFA | (20h 27m 26.22s , +01d 14m 33.3s) |   C |    60 | 17.1 |        
  120497 | 2021-04-21 06:38:15 |         MASTER-OAFA | (20h 35m 23.51s , +01d 15m 12.6s) |   C |    60 | 17.2 |        
  120577 | 2021-04-21 06:39:35 |         MASTER-OAFA | (20h 18m 37.35s , -00d 43m 22.3s) |   C |    60 | 17.3 |        
  120736 | 2021-04-21 06:42:14 |         MASTER-OAFA | (20h 19m 26.54s , +01d 16m 33.9s) |   C |    60 | 17.4 |        
  120815 | 2021-04-21 06:43:33 |         MASTER-OAFA | (20h 26m 41.10s , -00d 45m 16.8s) |   C |    60 | 17.5 |        
  121054 | 2021-04-21 06:47:32 |         MASTER-OAFA | (20h 34m 36.83s , -00d 43m 46.6s) |   C |    60 | 17.5 |        
  121133 | 2021-04-21 06:48:51 |         MASTER-OAFA | (20h 27m 27.38s , -02d 44m 35.0s) |   C |    60 | 17.4 |        
  121296 | 2021-04-21 06:51:34 |         MASTER-OAFA | (20h 27m 29.48s , +01d 14m 46.0s) |   C |    60 | 17.5 |        
  121455 | 2021-04-21 06:54:13 |         MASTER-OAFA | (20h 35m 26.78s , +01d 14m 18.5s) |   C |    60 | 17.5 |        
  121534 | 2021-04-21 06:55:32 |         MASTER-OAFA | (20h 18m 44.31s , -00d 43m 28.1s) |   C |    60 | 17.5 |        
  121696 | 2021-04-21 06:58:14 |         MASTER-OAFA | (20h 19m 23.79s , +01d 16m 42.2s) |   C |    60 | 17.4 |        
  129198 | 2021-04-21 09:03:16 |         MASTER-OAFA | (20h 29m 40.63s , +03d 15m 04.9s) |   C |    60 | 17.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4104
TYPE = 35
DAYS = 1


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 210419B ( Fermi GBM team, GCN 29831) errorbox  8248 sec after notice time and 8274 sec after trigger time at 2021-04-19 23:28:23 UT, with upper limit up to  16.1 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -27.1 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 210419B errorbox  20965 sec after notice time and 20992 sec after trigger time at 2021-04-20 03:00:20 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 45 deg. The sun  altitude  is -26.6 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the FERMI GRB 210419B errorbox  25544 sec after notice time and 25571 sec after trigger time at 2021-04-20 04:16:39 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 53 deg. The sun  altitude  is -28.5 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB 210419B errorbox  32096 sec after notice time and 32122 sec after trigger time at 2021-04-20 06:05:51 UT, with upper limit up to  18.8 mag. The observations began at zenith distance = 77 deg. The sun  altitude  is -61.1 deg. 

The galactic latitude b = -22 deg., longitude l = 45 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1596164

We obtain a following upper limits.  

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

    8305 | 2021-04-19 23:28:23 |   MASTER-Kislovodsk | (20h 27m 02.66s , +00d 07m 45.8s) |   C |    60 | 13.7 |        
    8543 | 2021-04-19 23:32:21 |   MASTER-Kislovodsk | (20h 19m 02.82s , +00d 06m 53.2s) |   C |    60 | 16.1 |        
    8860 | 2021-04-19 23:37:38 |   MASTER-Kislovodsk | (20h 19m 55.36s , +02d 08m 29.6s) |   C |    60 | 14.7 |        
    8940 | 2021-04-19 23:38:58 |   MASTER-Kislovodsk | (20h 27m 46.29s , -01d 51m 11.2s) |   C |    60 | 14.2 |        
    9257 | 2021-04-19 23:44:15 |   MASTER-Kislovodsk | (20h 27m 02.09s , +00d 07m 54.1s) |   C |    60 | 15.1 |        
    9337 | 2021-04-19 23:45:35 |   MASTER-Kislovodsk | (20h 35m 01.94s , +00d 08m 45.7s) |   C |    60 | 15.0 |        
    9496 | 2021-04-19 23:48:14 |   MASTER-Kislovodsk | (20h 19m 07.83s , +00d 07m 34.0s) |   C |    60 | 12.6 |        
   21022 | 2021-04-20 03:00:20 |         MASTER-SAAO | (20h 28m 11.36s , -00d 11m 13.5s) |   C |    60 | 19.2 |        
   21103 | 2021-04-20 03:01:41 |         MASTER-SAAO | (20h 28m 55.00s , -02d 12m 06.3s) |   C |    60 | 19.1 |        
   21182 | 2021-04-20 03:03:00 |         MASTER-SAAO | (20h 28m 53.69s , +01d 47m 56.8s) |   C |    60 | 19.2 |        
   25601 | 2021-04-20 04:16:39 |          MASTER-IAC | (20h 19m 19.80s , +01d 57m 55.7s) |   C |    60 | 18.6 |        
   25889 | 2021-04-20 04:21:27 |          MASTER-IAC | (20h 18m 35.75s , -00d 04m 15.2s) |   C |    60 | 18.8 |        
   26169 | 2021-04-20 04:26:07 |          MASTER-IAC | (20h 19m 22.19s , -02d 02m 17.7s) |   C |    60 | 18.7 |        
   26455 | 2021-04-20 04:30:53 |          MASTER-IAC | (20h 34m 41.49s , -00d 02m 50.3s) |   C |    60 | 19.1 |        
   26455 | 2021-04-20 04:30:53 |          MASTER-IAC | (20h 26m 35.96s , +00d 02m 35.6s) |   C |    60 | 18.6 |        
   26535 | 2021-04-20 04:32:13 |          MASTER-IAC | (20h 35m 18.89s , -02d 03m 40.6s) |   C |    60 | 18.9 |        
   26536 | 2021-04-20 04:32:13 |          MASTER-IAC | (20h 27m 13.04s , -01d 58m 15.1s) |   C |    60 | 18.5 |        
   26616 | 2021-04-20 04:33:34 |          MASTER-IAC | (20h 35m 21.29s , +01d 57m 20.3s) |   C |    60 | 19.1 |        
   26616 | 2021-04-20 04:33:34 |          MASTER-IAC | (20h 27m 15.20s , +02d 02m 47.8s) |   C |    60 | 18.5 |        
   27441 | 2021-04-20 04:47:19 |          MASTER-IAC | (20h 34m 34.59s , -00d 04m 29.3s) |   C |    60 | 19.0 |        
   27441 | 2021-04-20 04:47:19 |          MASTER-IAC | (20h 26m 28.68s , +00d 00m 53.4s) |   C |    60 | 18.5 |        
   27521 | 2021-04-20 04:48:39 |          MASTER-IAC | (20h 35m 25.71s , -02d 04m 28.8s) |   C |    60 | 18.9 |        
   27521 | 2021-04-20 04:48:39 |          MASTER-IAC | (20h 27m 19.51s , -01d 59m 06.4s) |   C |    60 | 18.4 |        
   27601 | 2021-04-20 04:49:59 |          MASTER-IAC | (20h 35m 24.49s , +01d 56m 58.9s) |   C |    60 | 19.1 |        
   27601 | 2021-04-20 04:49:59 |          MASTER-IAC | (20h 27m 18.12s , +02d 02m 22.2s) |   C |    60 | 18.5 |        
   29600 | 2021-04-20 05:23:18 |          MASTER-IAC | (20h 35m 23.68s , +01d 55m 30.2s) |   C |    60 | 19.1 |        
   29600 | 2021-04-20 05:23:18 |          MASTER-IAC | (20h 27m 18.28s , +02d 00m 47.3s) |   C |    60 | 18.5 |        
   32153 | 2021-04-20 06:05:51 |         MASTER-OAFA | (20h 26m 44.60s , -00d 44m 48.8s) |   C |    60 | 17.7 |        
   32232 | 2021-04-20 06:07:10 |         MASTER-OAFA | (20h 27m 30.46s , -02d 45m 36.8s) |   C |    60 | 17.6 |        
   32391 | 2021-04-20 06:09:49 |         MASTER-OAFA | (20h 27m 24.25s , +01d 15m 15.9s) |   C |    60 | 17.5 |        
   33713 | 2021-04-20 06:31:51 |         MASTER-OAFA | (20h 26m 42.81s , -00d 44m 05.2s) |   C |    60 | 18.0 |        
   33792 | 2021-04-20 06:33:10 |         MASTER-OAFA | (20h 34m 42.78s , -00d 45m 32.8s) |   C |    60 | 18.1 |        
   33872 | 2021-04-20 06:34:30 |         MASTER-OAFA | (20h 27m 30.23s , -02d 43m 56.9s) |   C |    60 | 17.9 |        
   34111 | 2021-04-20 06:38:29 |         MASTER-OAFA | (20h 18m 46.10s , -00d 44m 19.9s) |   C |    60 | 18.0 |        
   34191 | 2021-04-20 06:39:49 |         MASTER-OAFA | (20h 27m 26.53s , +01d 14m 26.6s) |   C |    60 | 18.0 |        
   34271 | 2021-04-20 06:41:08 |         MASTER-OAFA | (20h 35m 32.46s , +01d 14m 37.5s) |   C |    60 | 18.1 |        
   34430 | 2021-04-20 06:43:48 |         MASTER-OAFA | (20h 19m 29.45s , +01d 14m 44.7s) |   C |    60 | 17.9 |        
   34828 | 2021-04-20 06:50:25 |         MASTER-OAFA | (20h 26m 41.35s , -00d 45m 32.9s) |   C |    60 | 18.0 |        
   34907 | 2021-04-20 06:51:45 |         MASTER-OAFA | (20h 34m 46.15s , -00d 45m 32.2s) |   C |    60 | 18.1 |        
   34987 | 2021-04-20 06:53:05 |         MASTER-OAFA | (20h 27m 28.42s , -02d 43m 50.3s) |   C |    60 | 18.0 |        
   35227 | 2021-04-20 06:57:05 |         MASTER-OAFA | (20h 18m 41.74s , -00d 44m 21.4s) |   C |    60 | 18.0 |        
   35307 | 2021-04-20 06:58:25 |         MASTER-OAFA | (20h 27m 26.39s , +01d 16m 25.8s) |   C |    60 | 17.9 |        
   35387 | 2021-04-20 06:59:45 |         MASTER-OAFA | (20h 35m 32.28s , +01d 15m 12.7s) |   C |    60 | 18.1 |        
   35546 | 2021-04-20 07:02:24 |         MASTER-OAFA | (20h 19m 32.37s , +01d 14m 42.5s) |   C |    60 | 18.0 |        
   35845 | 2021-04-20 07:06:23 |         MASTER-OAFA | (20h 34m 48.51s , +01d 16m 12.7s) |   C |   180 | 18.8 |        
   36045 | 2021-04-20 07:09:43 |         MASTER-OAFA | (20h 34m 42.76s , +01d 15m 14.5s) |   C |   180 | 18.8 |        
   36244 | 2021-04-20 07:13:02 |         MASTER-OAFA | (20h 34m 41.42s , -02d 43m 45.4s) |   C |   180 | 18.5 |        
   36444 | 2021-04-20 07:16:22 |         MASTER-OAFA | (20h 34m 46.83s , -02d 44m 44.9s) |   C |   180 | 18.6 |        
   37043 | 2021-04-20 07:26:21 |         MASTER-OAFA | (20h 22m 45.11s , +01d 28m 14.4s) |   C |   180 | 18.5 |        
   37243 | 2021-04-20 07:29:41 |         MASTER-OAFA | (20h 22m 45.09s , +01d 26m 38.8s) |   C |   180 | 18.5 |        
   39994 | 2021-04-20 08:16:32 |         MASTER-OAFA | (20h 34m 51.84s , +00d 38m 04.9s) |   C |    60 | 18.1 |        
   40074 | 2021-04-20 08:17:52 |         MASTER-OAFA | (20h 35m 32.78s , -01d 20m 27.4s) |   C |    60 | 18.1 |        
   40154 | 2021-04-20 08:19:12 |         MASTER-OAFA | (20h 18m 49.00s , +00d 38m 28.4s) |   C |    60 | 17.9 |        
   40234 | 2021-04-20 08:20:32 |         MASTER-OAFA | (20h 35m 36.77s , +02d 39m 38.0s) |   C |    60 | 18.1 |        
   40394 | 2021-04-20 08:23:12 |         MASTER-OAFA | (20h 19m 30.60s , -01d 19m 40.2s) |   C |    60 | 17.9 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4098
TYPE = 35
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 210419B ( Fermi GBM team, GCN 29831) errorbox  8248 sec after notice time and 8274 sec after trigger time at 2021-04-19 23:28:23 UT, with upper limit up to  16.1 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -27.1 deg. 

The galactic latitude b = -22 deg., longitude l = 45 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1596170

We obtain a following upper limits.  

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

    8305 | 2021-04-19 23:28:23 |   MASTER-Kislovodsk | (20h 27m 02.66s , +00d 07m 45.8s) |   C |    60 | 13.7 |        
    8543 | 2021-04-19 23:32:21 |   MASTER-Kislovodsk | (20h 19m 02.82s , +00d 06m 53.2s) |   C |    60 | 16.1 |        
    8860 | 2021-04-19 23:37:38 |   MASTER-Kislovodsk | (20h 19m 55.36s , +02d 08m 29.6s) |   C |    60 | 14.7 |        
    8940 | 2021-04-19 23:38:58 |   MASTER-Kislovodsk | (20h 27m 46.29s , -01d 51m 11.2s) |   C |    60 | 14.2 |        
    9257 | 2021-04-19 23:44:15 |   MASTER-Kislovodsk | (20h 27m 02.09s , +00d 07m 54.1s) |   C |    60 | 15.1 |        
    9337 | 2021-04-19 23:45:35 |   MASTER-Kislovodsk | (20h 35m 01.94s , +00d 08m 45.7s) |   C |    60 | 15.0 |        
    9496 | 2021-04-19 23:48:14 |   MASTER-Kislovodsk | (20h 19m 07.83s , +00d 07m 34.0s) |   C |    60 | 12.6 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4097
TYPE = 35
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 210419B ( Fermi GBM team, GCN 29831) errorbox  8248 sec after notice time and 8274 sec after trigger time at 2021-04-19 23:28:23 UT, with upper limit up to  16.1 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -27.1 deg. 

The galactic latitude b = -22 deg., longitude l = 45 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1596170

We obtain a following upper limits.  

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

    8305 | 2021-04-19 23:28:23 |   MASTER-Kislovodsk | (20h 27m 02.66s , +00d 07m 45.8s) |   C |    60 | 13.7 |        
    8543 | 2021-04-19 23:32:21 |   MASTER-Kislovodsk | (20h 19m 02.82s , +00d 06m 53.2s) |   C |    60 | 16.1 |        
    8860 | 2021-04-19 23:37:38 |   MASTER-Kislovodsk | (20h 19m 55.36s , +02d 08m 29.6s) |   C |    60 | 14.7 |        
    8940 | 2021-04-19 23:38:58 |   MASTER-Kislovodsk | (20h 27m 46.29s , -01d 51m 11.2s) |   C |    60 | 14.2 |        
    9257 | 2021-04-19 23:44:15 |   MASTER-Kislovodsk | (20h 27m 02.09s , +00d 07m 54.1s) |   C |    60 | 15.1 |        
    9337 | 2021-04-19 23:45:35 |   MASTER-Kislovodsk | (20h 35m 01.94s , +00d 08m 45.7s) |   C |    60 | 15.0 |        
    9496 | 2021-04-19 23:48:14 |   MASTER-Kislovodsk | (20h 19m 07.83s , +00d 07m 34.0s) |   C |    60 | 12.6 |        
Filter C is a clear (unfiltred) band. 


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



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  ID = 4096
TYPE = 34
DAYS = 0


MASTER-Kislovodsk robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) started inspect of the FERMI GRB 210419B ( Fermi GBM team, GCN 29831) errorbox  8248 sec after notice time and 8274 sec after trigger time at 2021-04-19 23:28:23 UT, with upper limit up to  16.1 mag. The observations began at zenith distance = 71 deg. The sun  altitude  is -27.1 deg. 

The galactic latitude b = -22 deg., longitude l = 45 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1596170

We obtain a following upper limits.  

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

    8305 | 2021-04-19 23:28:23 |   MASTER-Kislovodsk | (20h 27m 02.66s , +00d 07m 45.8s) |   C |    60 | 13.7 |        
    8543 | 2021-04-19 23:32:21 |   MASTER-Kislovodsk | (20h 19m 02.82s , +00d 06m 53.2s) |   C |    60 | 16.1 |        
    8860 | 2021-04-19 23:37:38 |   MASTER-Kislovodsk | (20h 19m 55.36s , +02d 08m 29.6s) |   C |    60 | 14.7 |        
    8940 | 2021-04-19 23:38:58 |   MASTER-Kislovodsk | (20h 27m 46.29s , -01d 51m 11.2s) |   C |    60 | 14.2 |        
    9257 | 2021-04-19 23:44:15 |   MASTER-Kislovodsk | (20h 27m 02.09s , +00d 07m 54.1s) |   C |    60 | 15.1 |        
    9337 | 2021-04-19 23:45:35 |   MASTER-Kislovodsk | (20h 35m 01.94s , +00d 08m 45.7s) |   C |    60 | 15.0 |        
    9496 | 2021-04-19 23:48:14 |   MASTER-Kislovodsk | (20h 19m 07.83s , +00d 07m 34.0s) |   C |    60 | 12.6 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025