MASTER Net MASTER Database: GRB210821.32 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 GRB210821.32
Trignum 651224433
Trigger time 2021-08-21 07:40:28.59
Notice time 2021-08-21 07:50:48.552648
Coord, eb (03h 17m 21.60s , -06d 52m 12.0s) , 2.01
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You are viewing outdated information, relevant error box is here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
2513062 2024-06-29 19:57:18.756502 03h 17m 21.60s -06d 52m 12.0s FERMI 2.01 retraction 651224433 1 4044 retraction
1696288 2021-08-21 07:51:06.808216 03h 17m 21.60s -06d 52m 12.0s FERMI 2.01 alert 651224433 13 115 alert
1696281 2021-08-21 07:42:37.423357 03h 22m 12.00s -06d 04m 48.0s FERMI 2.57 alert 651224433 24 112 alert
1696269 2021-08-21 07:41:33.02104 03h 12m 19.99s +00d 43m 00.1s FERMI 6.2167 alert 651224433 30 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
49.7 2021-08-21 07:38:57.118 00h 00m 00.00s +00d 00m 00.0s OAFA 29008 Database OAFA
49.7 2021-08-21 07:37:29.333 00h 00m 00.00s +00d 00m 00.0s OAFA 111342 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-08-21 07:40:28 (JD 2459447.819769)

Siderial time 8.172614 h

Ra 03:17:21.60 Dec -6:52:12.00
( 49.340000d, -6.870000d)

Rise 2021-08-21 00:25:49

Transit 2021-08-21 05:48:16

Set 2021-08-21 11:10:44

Amur

Object: Altitude: -44.32 Azimuth: 156.23

Sun: Altitude: 26.97 Azimuth: 75.84

Moon: Altitude: -25.33 Azimuth: 273.38

Tunka

Object: Altitude: -33.72 Azimuth: 128.01

Sun: Altitude: 40.03 Azimuth: 51.33

Moon: Altitude: -40.30 Azimuth: 252.07

Kislovodsk

Object: Altitude: 3.70 Azimuth: 76.83

Sun: Altitude: 52.74 Azimuth: 321.15

Moon: Altitude: -66.24 Azimuth: 157.83

Tavrida

Object: Altitude: 9.27 Azimuth: 70.59

Sun: Altitude: 47.80 Azimuth: 310.76

Moon: Altitude: -62.31 Azimuth: 141.96

SAAO

Object: Altitude: 31.84 Azimuth: 103.12

Sun: Altitude: 28.42 Azimuth: 231.27

Moon: Altitude: -28.63 Azimuth: 33.25

IAC

Object: Altitude: 50.28 Azimuth: 30.59

Sun: Altitude: 12.76 Azimuth: 262.97

Moon: Altitude: -28.29 Azimuth: 79.70

Argentina

Object: Altitude: 49.91 Azimuth: 238.79

Sun: Altitude: -44.03 Azimuth: 284.84

Moon: Altitude: 37.02 Azimuth: 86.12

Mexico

Object: Altitude: 9.32 Azimuth: 283.91

Sun: Altitude: -46.65 Azimuth: 186.04

Moon: Altitude: 34.96 Azimuth: 20.22

Ural

Object: Altitude: -8.57 Azimuth: 90.58

Sun: Altitude: 44.85 Azimuth: 351.94

Moon: Altitude: -53.83 Azimuth: 192.09

Vostryakovo

Object: Altitude: 3.57 Azimuth: 72.46

Sun: Altitude: 41.69 Azimuth: 322.71

Moon: Altitude: -54.32 Azimuth: 157.09

Gal. latitude: -49.302577 Gal. longitude: 189.667300

Dist. to Sun: 102.148790

Dist. to Moon: 89.779772

Moon coord.: (316.885958 d, -21.299736 d)

Sun coord.: (150.348108 d, 12.108931 d)

Lunar disk: 0.981161

Lunar phase: 15.777943

Lunar bright limb: 236.655866

No SN in this field

2021-08-21 07:50:48 (JD 2459447.826944)

Siderial time 8.345308 h

Ra 03:17:21.60 Dec -6:52:12.00
( 49.340000d, -6.870000d)

Rise 2021-08-21 00:25:49

Transit 2021-08-21 05:48:16

Set 2021-08-21 11:10:44

Amur

Object: Altitude: -44.94 Azimuth: 159.74

Sun: Altitude: 25.36 Azimuth: 78.01

Moon: Altitude: -23.73 Azimuth: 275.22

Tunka

Object: Altitude: -34.96 Azimuth: 130.74

Sun: Altitude: 38.76 Azimuth: 54.15

Moon: Altitude: -38.81 Azimuth: 254.37

Kislovodsk

Object: Altitude: 1.87 Azimuth: 78.64

Sun: Altitude: 53.86 Azimuth: 324.94

Moon: Altitude: -66.81 Azimuth: 163.47

Tavrida

Object: Altitude: 7.53 Azimuth: 72.50

Sun: Altitude: 49.15 Azimuth: 313.97

Moon: Altitude: -63.32 Azimuth: 146.52

SAAO

Object: Altitude: 29.70 Azimuth: 101.46

Sun: Altitude: 30.10 Azimuth: 229.11

Moon: Altitude: -29.77 Azimuth: 30.94

IAC

Object: Altitude: 49.06 Azimuth: 34.09

Sun: Altitude: 15.02 Azimuth: 264.14

Moon: Altitude: -30.43 Azimuth: 80.70

Argentina

Object: Altitude: 51.77 Azimuth: 235.97

Sun: Altitude: -41.90 Azimuth: 282.99

Moon: Altitude: 34.90 Azimuth: 84.95

Mexico

Object: Altitude: 11.47 Azimuth: 285.34

Sun: Altitude: -46.35 Azimuth: 189.69

Moon: Altitude: 34.20 Azimuth: 22.88

Ural

Object: Altitude: -9.98 Azimuth: 92.76

Sun: Altitude: 45.00 Azimuth: 355.50

Moon: Altitude: -53.47 Azimuth: 195.96

Vostryakovo

Object: Altitude: 2.16 Azimuth: 74.61

Sun: Altitude: 42.54 Azimuth: 325.91

Moon: Altitude: -54.80 Azimuth: 161.00

Gal. latitude: -49.302577 Gal. longitude: 189.667300

Dist. to Sun: 102.155064

Dist. to Moon: 89.687567

Moon coord.: (316.989228 d, -21.274089 d)

Sun coord.: (150.354738 d, 12.106542 d)

Lunar disk: 0.981369

Lunar phase: 15.690304

Lunar bright limb: 236.513883

No SN in this field

2021-08-21 08:50:48 (JD 2459447.868611)

Siderial time 9.348046 h

Ra 03:17:21.60 Dec -6:52:12.00
( 49.340000d, -6.870000d)

Rise 2021-08-21 00:25:49

Transit 2021-08-21 05:48:16

Set 2021-08-21 11:10:44

Amur

Object: Altitude: -46.55 Azimuth: 181.08

Sun: Altitude: 15.84 Azimuth: 89.95

Moon: Altitude: -14.56 Azimuth: 285.67

Tunka

Object: Altitude: -41.01 Azimuth: 148.11

Sun: Altitude: 30.60 Azimuth: 69.02

Moon: Altitude: -29.90 Azimuth: 266.64

Kislovodsk

Object: Altitude: -8.92 Azimuth: 89.00

Sun: Altitude: 58.02 Azimuth: 350.24

Moon: Altitude: -66.53 Azimuth: 197.89

Tavrida

Object: Altitude: -2.91 Azimuth: 83.21

Sun: Altitude: 55.30 Azimuth: 335.86

Moon: Altitude: -66.38 Azimuth: 177.74

SAAO

Object: Altitude: 17.11 Azimuth: 92.69

Sun: Altitude: 38.59 Azimuth: 214.58

Moon: Altitude: -34.80 Azimuth: 16.15

IAC

Object: Altitude: 40.07 Azimuth: 50.92

Sun: Altitude: 28.21 Azimuth: 271.08

Moon: Altitude: -43.01 Azimuth: 86.71

Argentina

Object: Altitude: 60.91 Azimuth: 214.41

Sun: Altitude: -29.29 Azimuth: 273.74

Moon: Altitude: 22.70 Azimuth: 78.45

Mexico

Object: Altitude: 23.58 Azimuth: 294.53

Sun: Altitude: -42.04 Azimuth: 209.30

Moon: Altitude: 28.14 Azimuth: 36.95

Ural

Object: Altitude: -18.04 Azimuth: 105.73

Sun: Altitude: 44.16 Azimuth: 16.12

Moon: Altitude: -49.82 Azimuth: 216.93

Vostryakovo

Object: Altitude: -6.26 Azimuth: 86.96

Sun: Altitude: 46.01 Azimuth: 345.88

Moon: Altitude: -55.68 Azimuth: 184.68

Gal. latitude: -49.302577 Gal. longitude: 189.667300

Dist. to Sun: 102.191495

Dist. to Moon: 89.152396

Moon coord.: (317.587918 d, -21.123983 d)

Sun coord.: (150.393236 d, 12.092667 d)

Lunar disk: 0.982548

Lunar phase: 15.182743

Lunar bright limb: 235.666830

No SN in this field

2024-12-23 13:49:13 (JD 2460668.075845)

Siderial time 22.501261 h

Ra 03:17:21.60 Dec -6:52:12.00
( 49.340000d, -6.870000d)

Rise 2024-12-24 16:09:19

Transit 2024-12-24 21:31:47

Set 2024-12-25 02:54:14

Amur

Object: Altitude: 30.71 Azimuth: 20.96

Sun: Altitude: -56.98 Azimuth: 135.36

Moon: Altitude: -22.21 Azimuth: 248.18

Tunka

Object: Altitude: 31.07 Azimuth: 352.61

Sun: Altitude: -43.16 Azimuth: 108.08

Moon: Altitude: -34.10 Azimuth: 223.82

Kislovodsk

Object: Altitude: 11.45 Azimuth: 291.27

Sun: Altitude: -3.00 Azimuth: 59.93

Moon: Altitude: -44.41 Azimuth: 143.11

Tavrida

Object: Altitude: 5.36 Azimuth: 285.19

Sun: Altitude: 1.58 Azimuth: 54.04

Moon: Altitude: -39.63 Azimuth: 133.65

SAAO

Object: Altitude: 4.83 Azimuth: 275.08

Sun: Altitude: 46.45 Azimuth: 89.06

Moon: Altitude: -32.31 Azimuth: 59.94

IAC

Object: Altitude: -34.74 Azimuth: 257.99

Sun: Altitude: 37.12 Azimuth: 13.08

Moon: Altitude: -6.78 Azimuth: 89.00

Argentina

Object: Altitude: -51.31 Azimuth: 358.04

Sun: Altitude: 52.54 Azimuth: 267.71

Moon: Altitude: 41.35 Azimuth: 115.72

Mexico

Object: Altitude: -45.64 Azimuth: 114.58

Sun: Altitude: -5.91 Azimuth: 293.85

Moon: Altitude: 54.83 Azimuth: 2.83

Ural

Object: Altitude: 14.34 Azimuth: 308.39

Sun: Altitude: -18.12 Azimuth: 74.66

Moon: Altitude: -36.63 Azimuth: 169.49

Vostryakovo

Object: Altitude: 4.55 Azimuth: 289.06

Sun: Altitude: -6.46 Azimuth: 57.28

Moon: Altitude: -33.26 Azimuth: 143.16

Gal. latitude: -49.302577 Gal. longitude: 189.667300

Dist. to Sun: 128.444744

Dist. to Moon: 137.193443

Moon coord.: (187.881881 d, -4.083500 d)

Sun coord.: (272.052041 d, -23.433477 d)

Lunar disk: 0.440672

Lunar phase: 96.814513

Lunar bright limb: 113.140470

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4855
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  14.1 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210821A errorbox  54267 sec after notice time and 54295 sec after trigger time at 2021-08-21 22:45:24 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -32.5 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 210821A errorbox  58292 sec after notice time and 58321 sec after trigger time at 2021-08-21 23:52:30 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -64.1 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the FERMI GRB 210821A errorbox  73264 sec after notice time and 73292 sec after trigger time at 2021-08-22 04:02:01 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -31.7 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696288

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
   54326 | 2021-08-21 22:45:24 |      MASTER-Tavrida | (03h 20m 05.86s , -06d 10m 34.8s) |   C |    60 | 16.2 |        
   54815 | 2021-08-21 22:53:33 |      MASTER-Tavrida | (03h 12m 55.02s , -08d 06m 16.1s) |   C |    60 | 16.3 |        
   55229 | 2021-08-21 23:00:27 |      MASTER-Tavrida | (03h 21m 00.76s , -08d 04m 15.3s) |   C |    60 | 16.3 |        
   55410 | 2021-08-21 23:03:28 |      MASTER-Tavrida | (03h 12m 06.09s , -06d 12m 19.0s) |   C |    60 | 16.8 |        
   55661 | 2021-08-21 23:07:39 |      MASTER-Tavrida | (03h 20m 05.24s , -06d 10m 15.9s) |   C |    60 | 16.6 |        
   56075 | 2021-08-21 23:14:33 |      MASTER-Tavrida | (03h 12m 54.77s , -08d 04m 12.7s) |   C |    60 | 16.8 |        
   56154 | 2021-08-21 23:15:52 |      MASTER-Tavrida | (03h 21m 06.28s , -08d 05m 06.5s) |   C |    60 | 16.5 |        
   56461 | 2021-08-21 23:20:59 |      MASTER-Tavrida | (03h 12m 11.08s , -06d 11m 44.3s) |   C |    60 | 16.8 |        
   56540 | 2021-08-21 23:22:18 |      MASTER-Tavrida | (03h 11m 31.50s , -04d 18m 08.3s) |   C |    60 | 17.1 |        
   56619 | 2021-08-21 23:23:37 |      MASTER-Tavrida | (03h 19m 36.78s , -04d 16m 08.1s) |   C |    60 | 17.0 |        
   56698 | 2021-08-21 23:24:56 |      MASTER-Tavrida | (03h 20m 08.53s , -06d 11m 05.3s) |   C |    60 | 16.7 |        
   56777 | 2021-08-21 23:26:15 |      MASTER-Tavrida | (03h 14m 05.22s , -09d 59m 08.5s) |   C |    60 | 16.6 |        
   56856 | 2021-08-21 23:27:34 |      MASTER-Tavrida | (03h 22m 06.81s , -09d 59m 59.8s) |   C |    60 | 16.6 |        
   57077 | 2021-08-21 23:31:15 |      MASTER-Tavrida | (03h 05m 37.42s , -08d 04m 25.3s) |   C |    60 | 16.9 |        
   57156 | 2021-08-21 23:32:34 |      MASTER-Tavrida | (03h 12m 59.31s , -08d 05m 16.4s) |   C |    60 | 16.9 |        
   57235 | 2021-08-21 23:33:53 |      MASTER-Tavrida | (03h 20m 58.73s , -08d 06m 06.5s) |   C |    60 | 16.5 |        
   57622 | 2021-08-21 23:40:20 |      MASTER-Tavrida | (03h 04m 57.68s , -06d 10m 50.8s) |   C |    60 | 16.9 |        
   57701 | 2021-08-21 23:41:39 |      MASTER-Tavrida | (03h 11m 29.33s , -04d 17m 14.8s) |   C |    60 | 17.2 |        
   57780 | 2021-08-21 23:42:58 |      MASTER-Tavrida | (03h 19m 30.45s , -04d 16m 05.8s) |   C |    60 | 17.0 |        
   57859 | 2021-08-21 23:44:17 |      MASTER-Tavrida | (03h 14m 05.02s , -09d 59m 11.2s) |   C |    60 | 16.7 |        
   57938 | 2021-08-21 23:45:36 |      MASTER-Tavrida | (03h 22m 08.20s , -10d 00m 00.3s) |   C |    60 | 16.8 |        
   58096 | 2021-08-21 23:48:14 |      MASTER-Tavrida | (03h 05m 42.76s , -08d 04m 43.2s) |   C |    60 | 17.1 |        
   58351 | 2021-08-21 23:52:30 |         MASTER-SAAO | (03h 09m 41.93s , -10d 23m 37.8s) |   C |    60 | 18.0 |        
   58431 | 2021-08-21 23:53:49 |         MASTER-SAAO | (03h 15m 06.95s , -06d 36m 17.1s) |   C |    60 | 18.0 |        
   58511 | 2021-08-21 23:55:09 |         MASTER-SAAO | (03h 23m 06.70s , -06d 34m 26.2s) |   C |    60 | 17.7 |        
   58590 | 2021-08-21 23:56:29 |         MASTER-SAAO | (03h 15m 57.27s , -08d 28m 46.5s) |   C |    60 | 17.9 |        
   58670 | 2021-08-21 23:57:48 |         MASTER-SAAO | (03h 23m 56.68s , -08d 29m 10.6s) |   C |    60 | 17.8 |        
   58750 | 2021-08-21 23:59:08 |         MASTER-SAAO | (03h 30m 25.07s , -06d 34m 58.9s) |   C |    60 | 17.5 |        
   58858 | 2021-08-22 00:00:56 |      MASTER-Tavrida | (03h 04m 57.63s , -06d 10m 52.9s) |   C |    60 | 17.1 |        
   58937 | 2021-08-22 00:02:15 |      MASTER-Tavrida | (03h 11m 29.37s , -04d 17m 25.6s) |   C |    60 | 17.2 |        
   59016 | 2021-08-22 00:03:34 |      MASTER-Tavrida | (03h 19m 29.60s , -04d 16m 14.1s) |   C |    60 | 17.1 |        
   59095 | 2021-08-22 00:04:53 |      MASTER-Tavrida | (03h 14m 05.96s , -09d 59m 25.8s) |   C |    60 | 16.9 |        
   59174 | 2021-08-22 00:06:12 |      MASTER-Tavrida | (03h 22m 07.48s , -10d 00m 12.3s) |   C |    60 | 16.7 |        
   59799 | 2021-08-22 00:16:37 |         MASTER-SAAO | (03h 15m 06.01s , -06d 35m 35.2s) |   C |    60 | 17.9 |        
   59879 | 2021-08-22 00:17:57 |         MASTER-SAAO | (03h 23m 03.11s , -06d 36m 20.8s) |   C |    60 | 17.7 |        
   59966 | 2021-08-22 00:19:24 |      MASTER-Tavrida | (03h 05m 44.45s , -08d 06m 17.0s) |   C |    60 | 17.3 |        
   60172 | 2021-08-22 00:22:50 |         MASTER-SAAO | (03h 15m 53.28s , -08d 28m 37.0s) |   C |    60 | 18.0 |        
   60251 | 2021-08-22 00:24:10 |         MASTER-SAAO | (03h 23m 58.81s , -08d 30m 12.7s) |   C |    60 | 17.9 |        
   60331 | 2021-08-22 00:25:29 |         MASTER-SAAO | (03h 30m 23.15s , -06d 34m 30.0s) |   C |    60 | 17.7 |        
   60440 | 2021-08-22 00:27:18 |      MASTER-Tavrida | (03h 04m 55.99s , -06d 11m 53.7s) |   C |    60 | 17.5 |        
   60491 | 2021-08-22 00:28:09 |         MASTER-SAAO | (03h 14m 27.84s , -04d 41m 33.8s) |   C |    60 | 18.1 |        
   61400 | 2021-08-22 00:43:18 |         MASTER-SAAO | (03h 22m 28.48s , -04d 40m 38.1s) |   C |    60 | 18.0 |        
   61479 | 2021-08-22 00:44:37 |         MASTER-SAAO | (03h 14m 58.30s , -06d 35m 37.6s) |   C |    60 | 18.0 |        
   61773 | 2021-08-22 00:49:31 |         MASTER-SAAO | (03h 23m 07.70s , -06d 35m 28.5s) |   C |    60 | 17.9 |        
   61853 | 2021-08-22 00:50:51 |         MASTER-SAAO | (03h 15m 50.39s , -08d 30m 35.6s) |   C |    60 | 18.2 |        
   61932 | 2021-08-22 00:52:10 |         MASTER-SAAO | (03h 24m 01.23s , -08d 30m 02.3s) |   C |    60 | 18.1 |        
   62012 | 2021-08-22 00:53:30 |         MASTER-SAAO | (03h 30m 19.99s , -06d 34m 32.1s) |   C |    60 | 18.0 |        
   62171 | 2021-08-22 00:56:09 |         MASTER-SAAO | (03h 14m 27.57s , -04d 40m 49.9s) |   C |    60 | 18.2 |        
   62387 | 2021-08-22 00:59:45 |      MASTER-Tavrida | (03h 27m 27.17s , -06d 10m 54.2s) |   C |    60 | 17.2 |        
   62994 | 2021-08-22 01:09:52 |      MASTER-Tavrida | (03h 28m 18.50s , -08d 06m 43.9s) |   C |    60 | 17.5 |        
   63521 | 2021-08-22 01:18:39 |      MASTER-Tavrida | (03h 30m 33.56s , -06d 22m 11.2s) |   C |    60 | 16.5 |        
   63855 | 2021-08-22 01:24:13 |      MASTER-Tavrida | (03h 26m 48.56s , -04d 18m 43.8s) |   C |    60 | 17.6 |        
   64014 | 2021-08-22 01:26:52 |      MASTER-Tavrida | (03h 28m 22.59s , -08d 06m 53.5s) |   C |    60 | 17.5 |        
   64758 | 2021-08-22 01:39:16 |      MASTER-Tavrida | (03h 27m 30.58s , -06d 13m 08.9s) |   C |    60 | 17.4 |        
   65074 | 2021-08-22 01:44:33 |      MASTER-Tavrida | (03h 26m 43.07s , -04d 18m 31.3s) |   C |    60 | 17.5 |        
   65233 | 2021-08-22 01:47:11 |      MASTER-Tavrida | (03h 28m 25.39s , -08d 06m 40.1s) |   C |    60 | 17.3 |        
   73323 | 2021-08-22 04:02:01 |          MASTER-IAC | (03h 21m 23.99s , -06d 26m 35.8s) |   C |    60 | 17.3 |        
   73323 | 2021-08-22 04:02:01 |          MASTER-IAC | (03h 13m 15.89s , -06d 21m 38.1s) |   C |    60 | 17.4 |        
   73404 | 2021-08-22 04:03:22 |          MASTER-IAC | (03h 22m 22.63s , -08d 21m 39.9s) |   C |    60 | 17.5 |        
   73404 | 2021-08-22 04:03:22 |          MASTER-IAC | (03h 14m 12.57s , -08d 16m 39.3s) |   C |    60 | 17.3 |        
   73484 | 2021-08-22 04:04:42 |          MASTER-IAC | (03h 20m 44.32s , -04d 34m 45.5s) |   C |    60 | 17.5 |        
   73484 | 2021-08-22 04:04:42 |          MASTER-IAC | (03h 12m 37.78s , -04d 29m 43.3s) |   C |    60 | 17.5 |        
   73564 | 2021-08-22 04:06:02 |          MASTER-IAC | (03h 07m 00.93s , -08d 22m 57.8s) |   C |    60 | 17.6 |        
   73647 | 2021-08-22 04:07:25 |          MASTER-IAC | (03h 06m 09.75s , -06d 27m 30.1s) |   C |    60 | 17.6 |        
   73727 | 2021-08-22 04:08:45 |          MASTER-IAC | (03h 23m 27.66s , -10d 16m 33.1s) |   C |    60 | 17.5 |        
   73727 | 2021-08-22 04:08:45 |          MASTER-IAC | (03h 15m 15.10s , -10d 11m 32.0s) |   C |    60 | 17.3 |        
   73967 | 2021-08-22 04:12:45 |          MASTER-IAC | (03h 05m 30.04s , -04d 33m 18.1s) |   C |    60 | 17.8 |        
   74047 | 2021-08-22 04:14:05 |          MASTER-IAC | (03h 28m 41.27s , -06d 22m 26.7s) |   C |    60 | 17.1 |        
   74128 | 2021-08-22 04:15:26 |          MASTER-IAC | (03h 27m 54.59s , -04d 29m 26.8s) |   C |    60 | 17.4 |        
   74208 | 2021-08-22 04:16:46 |          MASTER-IAC | (03h 29m 35.38s , -08d 17m 07.8s) |   C |    60 | 17.2 |        
   74288 | 2021-08-22 04:18:06 |          MASTER-IAC | (03h 21m 27.70s , -06d 27m 09.9s) |   C |    60 | 17.4 |        
   74288 | 2021-08-22 04:18:06 |          MASTER-IAC | (03h 13m 19.76s , -06d 22m 06.7s) |   C |    60 | 17.4 |        
   74368 | 2021-08-22 04:19:26 |          MASTER-IAC | (03h 22m 20.74s , -08d 22m 32.7s) |   C |    60 | 17.5 |        
   74368 | 2021-08-22 04:19:26 |          MASTER-IAC | (03h 14m 10.71s , -08d 17m 30.0s) |   C |    60 | 17.4 |        
   74451 | 2021-08-22 04:20:49 |          MASTER-IAC | (03h 20m 51.66s , -04d 33m 02.3s) |   C |    60 | 17.6 |        
   74451 | 2021-08-22 04:20:49 |          MASTER-IAC | (03h 12m 45.14s , -04d 27m 57.6s) |   C |    60 | 17.5 |        
   74531 | 2021-08-22 04:22:09 |          MASTER-IAC | (03h 06m 55.84s , -08d 22m 20.2s) |   C |    60 | 17.6 |        
   74612 | 2021-08-22 04:23:31 |          MASTER-IAC | (03h 06m 07.66s , -06d 27m 21.2s) |   C |    60 | 18.0 |        
   74692 | 2021-08-22 04:24:50 |          MASTER-IAC | (03h 23m 31.82s , -10d 15m 54.4s) |   C |    60 | 17.6 |        
   74692 | 2021-08-22 04:24:50 |          MASTER-IAC | (03h 15m 19.18s , -10d 10m 52.6s) |   C |    60 | 17.4 |        
   74932 | 2021-08-22 04:28:50 |          MASTER-IAC | (03h 05m 33.60s , -04d 33m 42.5s) |   C |    60 | 17.7 |        
   75013 | 2021-08-22 04:30:11 |          MASTER-IAC | (03h 28m 37.55s , -06d 23m 17.6s) |   C |    60 | 17.2 |        
   75093 | 2021-08-22 04:31:31 |          MASTER-IAC | (03h 27m 59.19s , -04d 27m 55.3s) |   C |    60 | 17.4 |        
   75173 | 2021-08-22 04:32:51 |          MASTER-IAC | (03h 29m 29.29s , -08d 16m 30.0s) |   C |    60 | 17.4 |        
   75253 | 2021-08-22 04:34:11 |          MASTER-IAC | (03h 21m 24.73s , -06d 26m 59.0s) |   C |    60 | 17.6 |        
   75253 | 2021-08-22 04:34:11 |          MASTER-IAC | (03h 13m 16.62s , -06d 21m 55.7s) |   C |    60 | 17.5 |        
   75333 | 2021-08-22 04:35:31 |          MASTER-IAC | (03h 22m 23.34s , -08d 21m 58.1s) |   C |    60 | 17.5 |        
   75333 | 2021-08-22 04:35:31 |          MASTER-IAC | (03h 14m 13.20s , -08d 16m 55.2s) |   C |    60 | 17.4 |        
   75413 | 2021-08-22 04:36:51 |          MASTER-IAC | (03h 20m 45.23s , -04d 35m 00.2s) |   C |    60 | 17.6 |        
   75413 | 2021-08-22 04:36:51 |          MASTER-IAC | (03h 12m 38.53s , -04d 29m 56.5s) |   C |    60 | 17.5 |        
   75493 | 2021-08-22 04:38:11 |          MASTER-IAC | (03h 07m 01.20s , -08d 23m 11.0s) |   C |    60 | 17.8 |        
   75578 | 2021-08-22 04:39:36 |          MASTER-IAC | (03h 06m 10.04s , -06d 27m 41.7s) |   C |    60 | 17.9 |        
   75658 | 2021-08-22 04:40:56 |          MASTER-IAC | (03h 23m 28.08s , -10d 16m 48.6s) |   C |    60 | 17.6 |        
   75658 | 2021-08-22 04:40:56 |          MASTER-IAC | (03h 15m 15.09s , -10d 11m 47.6s) |   C |    60 | 17.4 |        
   75899 | 2021-08-22 04:44:57 |          MASTER-IAC | (03h 05m 31.48s , -04d 33m 27.0s) |   C |    60 | 17.8 |        
   75980 | 2021-08-22 04:46:18 |          MASTER-IAC | (03h 28m 40.47s , -06d 22m 34.2s) |   C |    60 | 17.2 |        
   76060 | 2021-08-22 04:47:38 |          MASTER-IAC | (03h 27m 54.74s , -04d 29m 34.1s) |   C |    60 | 17.4 |        
   76140 | 2021-08-22 04:48:58 |          MASTER-IAC | (03h 29m 35.66s , -08d 17m 19.7s) |   C |    60 | 17.4 |        
  137357 | 2021-08-22 21:49:16 |   MASTER-Kislovodsk | (03h 17m 51.08s , -06d 17m 31.5s) |   C |    60 | 14.1 |        
  140514 | 2021-08-22 22:41:52 |         MASTER-SAAO | (03h 16m 47.98s , -10d 23m 39.5s) |   C |    60 | 13.9 |        
  140753 | 2021-08-22 22:45:51 |         MASTER-SAAO | (03h 08m 29.89s , -08d 29m 44.4s) |   C |    60 | 15.3 |        
  141072 | 2021-08-22 22:51:10 |         MASTER-SAAO | (03h 07m 44.21s , -06d 35m 02.5s) |   C |    60 | 15.4 |        
  141304 | 2021-08-22 22:55:02 |      MASTER-Tavrida | (03h 12m 05.69s , -06d 12m 30.9s) |   C |    60 | 16.6 |        
  141528 | 2021-08-22 22:58:46 |         MASTER-SAAO | (03h 16m 50.98s , -10d 23m 43.4s) |   C |    60 | 16.1 |        
  141545 | 2021-08-22 22:59:03 |      MASTER-Tavrida | (03h 20m 11.73s , -06d 12m 13.8s) |   C |    60 | 16.5 |        
  141607 | 2021-08-22 23:00:05 |         MASTER-SAAO | (03h 25m 02.81s , -10d 21m 35.0s) |   C |    60 | 15.8 |        
  141625 | 2021-08-22 23:00:23 |      MASTER-Tavrida | (03h 12m 56.78s , -08d 05m 26.3s) |   C |    60 | 16.5 |        
  141791 | 2021-08-22 23:03:10 |      MASTER-Tavrida | (03h 21m 06.74s , -08d 05m 20.4s) |   C |    60 | 16.4 |        
  142419 | 2021-08-22 23:13:37 |      MASTER-Tavrida | (03h 12m 04.73s , -06d 10m 24.6s) |   C |    60 | 16.8 |        
  142661 | 2021-08-22 23:17:39 |      MASTER-Tavrida | (03h 20m 14.98s , -06d 12m 01.8s) |   C |    60 | 17.0 |        
  142957 | 2021-08-22 23:22:35 |      MASTER-Tavrida | (03h 12m 57.04s , -08d 04m 13.1s) |   C |    60 | 16.3 |        
  143035 | 2021-08-22 23:23:54 |      MASTER-Tavrida | (03h 21m 08.18s , -08d 05m 05.7s) |   C |    60 | 16.3 |        
  143502 | 2021-08-22 23:31:40 |      MASTER-Tavrida | (03h 12m 11.17s , -06d 12m 02.2s) |   C |    60 | 16.8 |        
  143580 | 2021-08-22 23:32:59 |      MASTER-Tavrida | (03h 20m 16.37s , -06d 10m 31.0s) |   C |    60 | 16.6 |        
  143659 | 2021-08-22 23:34:17 |      MASTER-Tavrida | (03h 11m 31.53s , -04d 16m 17.6s) |   C |    60 | 16.9 |        
  143738 | 2021-08-22 23:35:36 |      MASTER-Tavrida | (03h 19m 37.69s , -04d 17m 10.5s) |   C |    60 | 16.7 |        
  143958 | 2021-08-22 23:39:16 |      MASTER-Tavrida | (03h 22m 08.65s , -09d 58m 03.9s) |   C |    60 | 16.5 |        
  144037 | 2021-08-22 23:40:35 |      MASTER-Tavrida | (03h 13m 03.27s , -08d 05m 19.8s) |   C |    60 | 16.6 |        
  144117 | 2021-08-22 23:41:55 |      MASTER-Tavrida | (03h 21m 01.68s , -08d 06m 09.0s) |   C |    60 | 16.5 |        
  144661 | 2021-08-22 23:50:59 |      MASTER-Tavrida | (03h 05m 42.29s , -08d 04m 27.7s) |   C |    60 | 16.8 |        
  144740 | 2021-08-22 23:52:18 |      MASTER-Tavrida | (03h 11m 35.91s , -04d 17m 20.9s) |   C |    60 | 16.8 |        
  144820 | 2021-08-22 23:53:38 |      MASTER-Tavrida | (03h 19m 32.71s , -04d 18m 10.9s) |   C |    60 | 16.9 |        
  144899 | 2021-08-22 23:54:57 |      MASTER-Tavrida | (03h 14m 08.83s , -10d 00m 15.0s) |   C |    60 | 16.6 |        
  144978 | 2021-08-22 23:56:16 |      MASTER-Tavrida | (03h 22m 13.15s , -09d 58m 27.8s) |   C |    60 | 16.6 |        
  145110 | 2021-08-22 23:58:28 |         MASTER-SAAO | (03h 14m 54.80s , -06d 34m 43.4s) |   C |    60 | 17.5 |        
  145190 | 2021-08-22 23:59:48 |         MASTER-SAAO | (03h 22m 52.45s , -06d 35m 14.1s) |   C |    60 | 17.2 |        
  145275 | 2021-08-23 00:01:13 |         MASTER-SAAO | (03h 15m 45.17s , -08d 29m 24.7s) |   C |    60 | 17.6 |        
  145318 | 2021-08-23 00:01:56 |      MASTER-Tavrida | (03h 04m 51.57s , -06d 10m 38.3s) |   C |    60 | 17.3 |        
  145355 | 2021-08-23 00:02:33 |         MASTER-SAAO | (03h 23m 45.07s , -08d 30m 11.3s) |   C |    60 | 17.3 |        
  145434 | 2021-08-23 00:03:52 |         MASTER-SAAO | (03h 30m 10.60s , -06d 34m 01.2s) |   C |    60 | 17.2 |        
  145594 | 2021-08-23 00:06:32 |         MASTER-SAAO | (03h 29m 26.11s , -04d 41m 00.8s) |   C |    60 | 17.2 |        
  145833 | 2021-08-23 00:10:31 |         MASTER-SAAO | (03h 07m 03.91s , -04d 42m 13.8s) |   C |    60 | 17.8 |        
  145912 | 2021-08-23 00:11:51 |         MASTER-SAAO | (03h 31m 05.52s , -08d 29m 44.3s) |   C |    60 | 17.4 |        
  145932 | 2021-08-23 00:12:10 |      MASTER-Tavrida | (03h 11m 31.53s , -04d 17m 34.2s) |   C |    60 | 17.2 |        
  146011 | 2021-08-23 00:13:29 |      MASTER-Tavrida | (03h 19m 33.35s , -04d 16m 22.0s) |   C |    60 | 17.2 |        
  146072 | 2021-08-23 00:14:30 |         MASTER-SAAO | (03h 14m 48.24s , -06d 35m 27.0s) |   C |    60 | 17.8 |        
  146090 | 2021-08-23 00:14:48 |      MASTER-Tavrida | (03h 14m 10.00s , -09d 59m 37.4s) |   C |    60 | 16.8 |        
  146151 | 2021-08-23 00:15:49 |         MASTER-SAAO | (03h 22m 52.79s , -06d 34m 14.1s) |   C |    60 | 17.3 |        
  146169 | 2021-08-23 00:16:07 |      MASTER-Tavrida | (03h 22m 11.32s , -10d 00m 23.4s) |   C |    60 | 17.0 |        
  146231 | 2021-08-23 00:17:09 |         MASTER-SAAO | (03h 15m 45.00s , -08d 29m 24.9s) |   C |    60 | 17.5 |        
  146311 | 2021-08-23 00:18:29 |         MASTER-SAAO | (03h 23m 45.32s , -08d 30m 13.1s) |   C |    60 | 17.4 |        
  146391 | 2021-08-23 00:19:49 |         MASTER-SAAO | (03h 30m 13.75s , -06d 35m 46.8s) |   C |    60 | 17.4 |        
  146550 | 2021-08-23 00:22:28 |         MASTER-SAAO | (03h 29m 29.62s , -04d 42m 03.1s) |   C |    60 | 17.3 |        
  146789 | 2021-08-23 00:26:27 |         MASTER-SAAO | (03h 06m 57.70s , -04d 40m 39.8s) |   C |    60 | 17.8 |        
  146868 | 2021-08-23 00:27:47 |         MASTER-SAAO | (03h 31m 07.68s , -08d 29m 03.2s) |   C |    60 | 17.4 |        
  147028 | 2021-08-23 00:30:26 |         MASTER-SAAO | (03h 14m 54.45s , -06d 36m 03.9s) |   C |    60 | 17.5 |        
  147108 | 2021-08-23 00:31:46 |         MASTER-SAAO | (03h 22m 55.04s , -06d 34m 34.4s) |   C |    60 | 17.4 |        
  147188 | 2021-08-23 00:33:06 |         MASTER-SAAO | (03h 15m 42.63s , -08d 30m 04.8s) |   C |    60 | 17.7 |        
  147267 | 2021-08-23 00:34:26 |         MASTER-SAAO | (03h 23m 52.00s , -08d 28m 28.8s) |   C |    60 | 17.5 |        
  147347 | 2021-08-23 00:35:45 |         MASTER-SAAO | (03h 30m 07.51s , -06d 35m 07.4s) |   C |    60 | 17.4 |        
  147498 | 2021-08-23 00:38:16 |      MASTER-Tavrida | (03h 05m 46.86s , -08d 06m 12.8s) |   C |    60 | 17.1 |        
  147506 | 2021-08-23 00:38:24 |         MASTER-SAAO | (03h 29m 32.03s , -04d 41m 09.1s) |   C |    60 | 17.5 |        
  147656 | 2021-08-23 00:40:54 |      MASTER-Tavrida | (03h 04m 58.91s , -06d 12m 59.7s) |   C |    60 | 17.3 |        
  147745 | 2021-08-23 00:42:24 |         MASTER-SAAO | (03h 07m 00.49s , -04d 41m 08.2s) |   C |    60 | 17.8 |        
  147825 | 2021-08-23 00:43:43 |         MASTER-SAAO | (03h 31m 04.83s , -08d 30m 02.7s) |   C |    60 | 17.8 |        
  147985 | 2021-08-23 00:46:23 |         MASTER-SAAO | (03h 14m 11.42s , -04d 40m 32.9s) |   C |    60 | 17.7 |        
  148064 | 2021-08-23 00:47:42 |         MASTER-SAAO | (03h 22m 18.16s , -04d 41m 22.5s) |   C |    60 | 17.6 |        
  148964 | 2021-08-23 01:02:42 |         MASTER-SAAO | (03h 14m 17.85s , -04d 41m 30.4s) |   C |    60 | 17.9 |        
  149044 | 2021-08-23 01:04:02 |         MASTER-SAAO | (03h 22m 12.76s , -04d 42m 20.8s) |   C |    60 | 17.7 |        
  149405 | 2021-08-23 01:10:03 |      MASTER-Tavrida | (03h 26m 50.83s , -04d 18m 26.9s) |   C |    60 | 17.0 |        
  149803 | 2021-08-23 01:16:41 |      MASTER-Tavrida | (03h 28m 21.72s , -08d 06m 59.0s) |   C |    60 | 17.0 |        
  149955 | 2021-08-23 01:19:13 |         MASTER-SAAO | (03h 14m 19.16s , -04d 43m 04.1s) |   C |    60 | 18.0 |        
  150035 | 2021-08-23 01:20:33 |         MASTER-SAAO | (03h 22m 23.10s , -04d 40m 56.6s) |   C |    60 | 17.8 |        
  150401 | 2021-08-23 01:26:39 |      MASTER-Tavrida | (03h 27m 26.30s , -06d 11m 10.9s) |   C |    60 | 17.0 |        
  150560 | 2021-08-23 01:29:18 |      MASTER-Tavrida | (03h 26m 44.58s , -04d 19m 12.4s) |   C |    60 | 17.0 |        
  150876 | 2021-08-23 01:34:34 |      MASTER-Tavrida | (03h 28m 27.09s , -08d 05m 49.9s) |   C |    60 | 16.9 |        
  151510 | 2021-08-23 01:45:08 |      MASTER-Tavrida | (03h 27m 26.96s , -06d 11m 21.0s) |   C |    60 | 16.9 |        
  151668 | 2021-08-23 01:47:46 |      MASTER-Tavrida | (03h 26m 45.66s , -04d 19m 23.4s) |   C |    60 | 17.0 |        
  151984 | 2021-08-23 01:53:02 |      MASTER-Tavrida | (03h 28m 26.72s , -08d 05m 39.7s) |   C |    60 | 16.6 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4843
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  12.6 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210821A errorbox  54267 sec after notice time and 54295 sec after trigger time at 2021-08-21 22:45:24 UT, with upper limit up to  17.6 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -32.5 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 210821A errorbox  58292 sec after notice time and 58321 sec after trigger time at 2021-08-21 23:52:30 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -64.1 deg. 

MASTER-IAC robotic telescope  located in Spain (IAC Teide Observatory) started inspect of the FERMI GRB 210821A errorbox  73264 sec after notice time and 73292 sec after trigger time at 2021-08-22 04:02:01 UT, with upper limit up to  18.0 mag. The observations began at zenith distance = 48 deg. The sun  altitude  is -31.7 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696282

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
   54326 | 2021-08-21 22:45:24 |      MASTER-Tavrida | (03h 20m 05.86s , -06d 10m 34.8s) |   C |    60 | 16.2 |        
   54815 | 2021-08-21 22:53:33 |      MASTER-Tavrida | (03h 12m 55.02s , -08d 06m 16.1s) |   C |    60 | 16.3 |        
   55229 | 2021-08-21 23:00:27 |      MASTER-Tavrida | (03h 21m 00.76s , -08d 04m 15.3s) |   C |    60 | 16.3 |        
   55410 | 2021-08-21 23:03:28 |      MASTER-Tavrida | (03h 12m 06.09s , -06d 12m 19.0s) |   C |    60 | 16.8 |        
   55661 | 2021-08-21 23:07:39 |      MASTER-Tavrida | (03h 20m 05.24s , -06d 10m 15.9s) |   C |    60 | 16.6 |        
   56075 | 2021-08-21 23:14:33 |      MASTER-Tavrida | (03h 12m 54.77s , -08d 04m 12.7s) |   C |    60 | 16.8 |        
   56154 | 2021-08-21 23:15:52 |      MASTER-Tavrida | (03h 21m 06.28s , -08d 05m 06.5s) |   C |    60 | 16.5 |        
   56461 | 2021-08-21 23:20:59 |      MASTER-Tavrida | (03h 12m 11.08s , -06d 11m 44.3s) |   C |    60 | 16.8 |        
   56540 | 2021-08-21 23:22:18 |      MASTER-Tavrida | (03h 11m 31.50s , -04d 18m 08.3s) |   C |    60 | 17.1 |        
   56619 | 2021-08-21 23:23:37 |      MASTER-Tavrida | (03h 19m 36.78s , -04d 16m 08.1s) |   C |    60 | 17.0 |        
   56698 | 2021-08-21 23:24:56 |      MASTER-Tavrida | (03h 20m 08.53s , -06d 11m 05.3s) |   C |    60 | 16.7 |        
   56777 | 2021-08-21 23:26:15 |      MASTER-Tavrida | (03h 14m 05.22s , -09d 59m 08.5s) |   C |    60 | 16.6 |        
   56856 | 2021-08-21 23:27:34 |      MASTER-Tavrida | (03h 22m 06.81s , -09d 59m 59.8s) |   C |    60 | 16.6 |        
   57077 | 2021-08-21 23:31:15 |      MASTER-Tavrida | (03h 05m 37.42s , -08d 04m 25.3s) |   C |    60 | 16.9 |        
   57156 | 2021-08-21 23:32:34 |      MASTER-Tavrida | (03h 12m 59.31s , -08d 05m 16.4s) |   C |    60 | 16.9 |        
   57235 | 2021-08-21 23:33:53 |      MASTER-Tavrida | (03h 20m 58.73s , -08d 06m 06.5s) |   C |    60 | 16.5 |        
   57622 | 2021-08-21 23:40:20 |      MASTER-Tavrida | (03h 04m 57.68s , -06d 10m 50.8s) |   C |    60 | 16.9 |        
   57701 | 2021-08-21 23:41:39 |      MASTER-Tavrida | (03h 11m 29.33s , -04d 17m 14.8s) |   C |    60 | 17.2 |        
   57780 | 2021-08-21 23:42:58 |      MASTER-Tavrida | (03h 19m 30.45s , -04d 16m 05.8s) |   C |    60 | 17.0 |        
   57859 | 2021-08-21 23:44:17 |      MASTER-Tavrida | (03h 14m 05.02s , -09d 59m 11.2s) |   C |    60 | 16.7 |        
   57938 | 2021-08-21 23:45:36 |      MASTER-Tavrida | (03h 22m 08.20s , -10d 00m 00.3s) |   C |    60 | 16.8 |        
   58096 | 2021-08-21 23:48:14 |      MASTER-Tavrida | (03h 05m 42.76s , -08d 04m 43.2s) |   C |    60 | 17.1 |        
   58351 | 2021-08-21 23:52:30 |         MASTER-SAAO | (03h 09m 41.93s , -10d 23m 37.8s) |   C |    60 | 18.0 |        
   58431 | 2021-08-21 23:53:49 |         MASTER-SAAO | (03h 15m 06.95s , -06d 36m 17.1s) |   C |    60 | 18.0 |        
   58511 | 2021-08-21 23:55:09 |         MASTER-SAAO | (03h 23m 06.70s , -06d 34m 26.2s) |   C |    60 | 17.7 |        
   58590 | 2021-08-21 23:56:29 |         MASTER-SAAO | (03h 15m 57.27s , -08d 28m 46.5s) |   C |    60 | 17.9 |        
   58670 | 2021-08-21 23:57:48 |         MASTER-SAAO | (03h 23m 56.68s , -08d 29m 10.6s) |   C |    60 | 17.8 |        
   58750 | 2021-08-21 23:59:08 |         MASTER-SAAO | (03h 30m 25.07s , -06d 34m 58.9s) |   C |    60 | 17.5 |        
   58858 | 2021-08-22 00:00:56 |      MASTER-Tavrida | (03h 04m 57.63s , -06d 10m 52.9s) |   C |    60 | 17.1 |        
   58937 | 2021-08-22 00:02:15 |      MASTER-Tavrida | (03h 11m 29.37s , -04d 17m 25.6s) |   C |    60 | 17.2 |        
   59016 | 2021-08-22 00:03:34 |      MASTER-Tavrida | (03h 19m 29.60s , -04d 16m 14.1s) |   C |    60 | 17.1 |        
   59095 | 2021-08-22 00:04:53 |      MASTER-Tavrida | (03h 14m 05.96s , -09d 59m 25.8s) |   C |    60 | 16.9 |        
   59174 | 2021-08-22 00:06:12 |      MASTER-Tavrida | (03h 22m 07.48s , -10d 00m 12.3s) |   C |    60 | 16.7 |        
   59799 | 2021-08-22 00:16:37 |         MASTER-SAAO | (03h 15m 06.01s , -06d 35m 35.2s) |   C |    60 | 17.9 |        
   59879 | 2021-08-22 00:17:57 |         MASTER-SAAO | (03h 23m 03.11s , -06d 36m 20.8s) |   C |    60 | 17.7 |        
   59966 | 2021-08-22 00:19:24 |      MASTER-Tavrida | (03h 05m 44.45s , -08d 06m 17.0s) |   C |    60 | 17.3 |        
   60172 | 2021-08-22 00:22:50 |         MASTER-SAAO | (03h 15m 53.28s , -08d 28m 37.0s) |   C |    60 | 18.0 |        
   60251 | 2021-08-22 00:24:10 |         MASTER-SAAO | (03h 23m 58.81s , -08d 30m 12.7s) |   C |    60 | 17.9 |        
   60331 | 2021-08-22 00:25:29 |         MASTER-SAAO | (03h 30m 23.15s , -06d 34m 30.0s) |   C |    60 | 17.7 |        
   60440 | 2021-08-22 00:27:18 |      MASTER-Tavrida | (03h 04m 55.99s , -06d 11m 53.7s) |   C |    60 | 17.5 |        
   60491 | 2021-08-22 00:28:09 |         MASTER-SAAO | (03h 14m 27.84s , -04d 41m 33.8s) |   C |    60 | 18.1 |        
   61400 | 2021-08-22 00:43:18 |         MASTER-SAAO | (03h 22m 28.48s , -04d 40m 38.1s) |   C |    60 | 18.0 |        
   61479 | 2021-08-22 00:44:37 |         MASTER-SAAO | (03h 14m 58.30s , -06d 35m 37.6s) |   C |    60 | 18.0 |        
   61773 | 2021-08-22 00:49:31 |         MASTER-SAAO | (03h 23m 07.70s , -06d 35m 28.5s) |   C |    60 | 17.9 |        
   61853 | 2021-08-22 00:50:51 |         MASTER-SAAO | (03h 15m 50.39s , -08d 30m 35.6s) |   C |    60 | 18.2 |        
   61932 | 2021-08-22 00:52:10 |         MASTER-SAAO | (03h 24m 01.23s , -08d 30m 02.3s) |   C |    60 | 18.1 |        
   62012 | 2021-08-22 00:53:30 |         MASTER-SAAO | (03h 30m 19.99s , -06d 34m 32.1s) |   C |    60 | 18.0 |        
   62171 | 2021-08-22 00:56:09 |         MASTER-SAAO | (03h 14m 27.57s , -04d 40m 49.9s) |   C |    60 | 18.2 |        
   62387 | 2021-08-22 00:59:45 |      MASTER-Tavrida | (03h 27m 27.17s , -06d 10m 54.2s) |   C |    60 | 17.2 |        
   62994 | 2021-08-22 01:09:52 |      MASTER-Tavrida | (03h 28m 18.50s , -08d 06m 43.9s) |   C |    60 | 17.5 |        
   63521 | 2021-08-22 01:18:39 |      MASTER-Tavrida | (03h 30m 33.56s , -06d 22m 11.2s) |   C |    60 | 16.5 |        
   63855 | 2021-08-22 01:24:13 |      MASTER-Tavrida | (03h 26m 48.56s , -04d 18m 43.8s) |   C |    60 | 17.6 |        
   64014 | 2021-08-22 01:26:52 |      MASTER-Tavrida | (03h 28m 22.59s , -08d 06m 53.5s) |   C |    60 | 17.5 |        
   64758 | 2021-08-22 01:39:16 |      MASTER-Tavrida | (03h 27m 30.58s , -06d 13m 08.9s) |   C |    60 | 17.4 |        
   65074 | 2021-08-22 01:44:33 |      MASTER-Tavrida | (03h 26m 43.07s , -04d 18m 31.3s) |   C |    60 | 17.5 |        
   65233 | 2021-08-22 01:47:11 |      MASTER-Tavrida | (03h 28m 25.39s , -08d 06m 40.1s) |   C |    60 | 17.3 |        
   73323 | 2021-08-22 04:02:01 |          MASTER-IAC | (03h 21m 23.99s , -06d 26m 35.8s) |   C |    60 | 17.3 |        
   73323 | 2021-08-22 04:02:01 |          MASTER-IAC | (03h 13m 15.89s , -06d 21m 38.1s) |   C |    60 | 17.4 |        
   73404 | 2021-08-22 04:03:22 |          MASTER-IAC | (03h 22m 22.63s , -08d 21m 39.9s) |   C |    60 | 17.5 |        
   73404 | 2021-08-22 04:03:22 |          MASTER-IAC | (03h 14m 12.57s , -08d 16m 39.3s) |   C |    60 | 17.3 |        
   73484 | 2021-08-22 04:04:42 |          MASTER-IAC | (03h 20m 44.32s , -04d 34m 45.5s) |   C |    60 | 17.5 |        
   73484 | 2021-08-22 04:04:42 |          MASTER-IAC | (03h 12m 37.78s , -04d 29m 43.3s) |   C |    60 | 17.5 |        
   73564 | 2021-08-22 04:06:02 |          MASTER-IAC | (03h 07m 00.93s , -08d 22m 57.8s) |   C |    60 | 17.6 |        
   73647 | 2021-08-22 04:07:25 |          MASTER-IAC | (03h 06m 09.75s , -06d 27m 30.1s) |   C |    60 | 17.6 |        
   73727 | 2021-08-22 04:08:45 |          MASTER-IAC | (03h 23m 27.66s , -10d 16m 33.1s) |   C |    60 | 17.5 |        
   73727 | 2021-08-22 04:08:45 |          MASTER-IAC | (03h 15m 15.10s , -10d 11m 32.0s) |   C |    60 | 17.3 |        
   73967 | 2021-08-22 04:12:45 |          MASTER-IAC | (03h 05m 30.04s , -04d 33m 18.1s) |   C |    60 | 17.8 |        
   74047 | 2021-08-22 04:14:05 |          MASTER-IAC | (03h 28m 41.27s , -06d 22m 26.7s) |   C |    60 | 17.1 |        
   74128 | 2021-08-22 04:15:26 |          MASTER-IAC | (03h 27m 54.59s , -04d 29m 26.8s) |   C |    60 | 17.4 |        
   74208 | 2021-08-22 04:16:46 |          MASTER-IAC | (03h 29m 35.38s , -08d 17m 07.8s) |   C |    60 | 17.2 |        
   74288 | 2021-08-22 04:18:06 |          MASTER-IAC | (03h 21m 27.70s , -06d 27m 09.9s) |   C |    60 | 17.4 |        
   74288 | 2021-08-22 04:18:06 |          MASTER-IAC | (03h 13m 19.76s , -06d 22m 06.7s) |   C |    60 | 17.4 |        
   74368 | 2021-08-22 04:19:26 |          MASTER-IAC | (03h 22m 20.74s , -08d 22m 32.7s) |   C |    60 | 17.5 |        
   74368 | 2021-08-22 04:19:26 |          MASTER-IAC | (03h 14m 10.71s , -08d 17m 30.0s) |   C |    60 | 17.4 |        
   74451 | 2021-08-22 04:20:49 |          MASTER-IAC | (03h 20m 51.66s , -04d 33m 02.3s) |   C |    60 | 17.6 |        
   74451 | 2021-08-22 04:20:49 |          MASTER-IAC | (03h 12m 45.14s , -04d 27m 57.6s) |   C |    60 | 17.5 |        
   74531 | 2021-08-22 04:22:09 |          MASTER-IAC | (03h 06m 55.84s , -08d 22m 20.2s) |   C |    60 | 17.6 |        
   74612 | 2021-08-22 04:23:31 |          MASTER-IAC | (03h 06m 07.66s , -06d 27m 21.2s) |   C |    60 | 18.0 |        
   74692 | 2021-08-22 04:24:50 |          MASTER-IAC | (03h 23m 31.82s , -10d 15m 54.4s) |   C |    60 | 17.6 |        
   74692 | 2021-08-22 04:24:50 |          MASTER-IAC | (03h 15m 19.18s , -10d 10m 52.6s) |   C |    60 | 17.4 |        
   74932 | 2021-08-22 04:28:50 |          MASTER-IAC | (03h 05m 33.60s , -04d 33m 42.5s) |   C |    60 | 17.7 |        
   75013 | 2021-08-22 04:30:11 |          MASTER-IAC | (03h 28m 37.55s , -06d 23m 17.6s) |   C |    60 | 17.2 |        
   75093 | 2021-08-22 04:31:31 |          MASTER-IAC | (03h 27m 59.19s , -04d 27m 55.3s) |   C |    60 | 17.4 |        
   75173 | 2021-08-22 04:32:51 |          MASTER-IAC | (03h 29m 29.29s , -08d 16m 30.0s) |   C |    60 | 17.4 |        
   75253 | 2021-08-22 04:34:11 |          MASTER-IAC | (03h 21m 24.73s , -06d 26m 59.0s) |   C |    60 | 17.6 |        
   75253 | 2021-08-22 04:34:11 |          MASTER-IAC | (03h 13m 16.62s , -06d 21m 55.7s) |   C |    60 | 17.5 |        
   75333 | 2021-08-22 04:35:31 |          MASTER-IAC | (03h 22m 23.34s , -08d 21m 58.1s) |   C |    60 | 17.5 |        
   75333 | 2021-08-22 04:35:31 |          MASTER-IAC | (03h 14m 13.20s , -08d 16m 55.2s) |   C |    60 | 17.4 |        
   75413 | 2021-08-22 04:36:51 |          MASTER-IAC | (03h 20m 45.23s , -04d 35m 00.2s) |   C |    60 | 17.6 |        
   75413 | 2021-08-22 04:36:51 |          MASTER-IAC | (03h 12m 38.53s , -04d 29m 56.5s) |   C |    60 | 17.5 |        
   75493 | 2021-08-22 04:38:11 |          MASTER-IAC | (03h 07m 01.20s , -08d 23m 11.0s) |   C |    60 | 17.8 |        
   75578 | 2021-08-22 04:39:36 |          MASTER-IAC | (03h 06m 10.04s , -06d 27m 41.7s) |   C |    60 | 17.9 |        
   75658 | 2021-08-22 04:40:56 |          MASTER-IAC | (03h 23m 28.08s , -10d 16m 48.6s) |   C |    60 | 17.6 |        
   75658 | 2021-08-22 04:40:56 |          MASTER-IAC | (03h 15m 15.09s , -10d 11m 47.6s) |   C |    60 | 17.4 |        
   75899 | 2021-08-22 04:44:57 |          MASTER-IAC | (03h 05m 31.48s , -04d 33m 27.0s) |   C |    60 | 17.8 |        
   75980 | 2021-08-22 04:46:18 |          MASTER-IAC | (03h 28m 40.47s , -06d 22m 34.2s) |   C |    60 | 17.2 |        
   76060 | 2021-08-22 04:47:38 |          MASTER-IAC | (03h 27m 54.74s , -04d 29m 34.1s) |   C |    60 | 17.4 |        
   76140 | 2021-08-22 04:48:58 |          MASTER-IAC | (03h 29m 35.66s , -08d 17m 19.7s) |   C |    60 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4841
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  12.6 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210821A errorbox  54267 sec after notice time and 54295 sec after trigger time at 2021-08-21 22:45:24 UT, with upper limit up to  16.8 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -32.5 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696282

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
   54326 | 2021-08-21 22:45:24 |      MASTER-Tavrida | (03h 20m 05.86s , -06d 10m 34.8s) |   C |    60 | 16.2 |        
   54815 | 2021-08-21 22:53:33 |      MASTER-Tavrida | (03h 12m 55.02s , -08d 06m 16.1s) |   C |    60 | 16.3 |        
   55229 | 2021-08-21 23:00:27 |      MASTER-Tavrida | (03h 21m 00.76s , -08d 04m 15.3s) |   C |    60 | 16.3 |        
   55410 | 2021-08-21 23:03:28 |      MASTER-Tavrida | (03h 12m 06.09s , -06d 12m 19.0s) |   C |    60 | 16.8 |        
   55661 | 2021-08-21 23:07:39 |      MASTER-Tavrida | (03h 20m 05.24s , -06d 10m 15.9s) |   C |    60 | 16.6 |        
   56075 | 2021-08-21 23:14:33 |      MASTER-Tavrida | (03h 12m 54.77s , -08d 04m 12.7s) |   C |    60 | 16.8 |        
   56154 | 2021-08-21 23:15:52 |      MASTER-Tavrida | (03h 21m 06.28s , -08d 05m 06.5s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4840
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  12.6 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210821A errorbox  54267 sec after notice time and 54295 sec after trigger time at 2021-08-21 22:45:24 UT, with upper limit up to  16.8 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -32.5 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696282

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
   54326 | 2021-08-21 22:45:24 |      MASTER-Tavrida | (03h 20m 05.86s , -06d 10m 34.8s) |   C |    60 | 16.2 |        
   54815 | 2021-08-21 22:53:33 |      MASTER-Tavrida | (03h 12m 55.02s , -08d 06m 16.1s) |   C |    60 | 16.3 |        
   55229 | 2021-08-21 23:00:27 |      MASTER-Tavrida | (03h 21m 00.76s , -08d 04m 15.3s) |   C |    60 | 16.3 |        
   55410 | 2021-08-21 23:03:28 |      MASTER-Tavrida | (03h 12m 06.09s , -06d 12m 19.0s) |   C |    60 | 16.8 |        
   55661 | 2021-08-21 23:07:39 |      MASTER-Tavrida | (03h 20m 05.24s , -06d 10m 15.9s) |   C |    60 | 16.6 |        
   56075 | 2021-08-21 23:14:33 |      MASTER-Tavrida | (03h 12m 54.77s , -08d 04m 12.7s) |   C |    60 | 16.8 |        
   56154 | 2021-08-21 23:15:52 |      MASTER-Tavrida | (03h 21m 06.28s , -08d 05m 06.5s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4839
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  12.6 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 210821A errorbox  54267 sec after notice time and 54295 sec after trigger time at 2021-08-21 22:45:24 UT, with upper limit up to  16.8 mag. The observations began at zenith distance = 76 deg. The sun  altitude  is -32.5 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696282

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
   54326 | 2021-08-21 22:45:24 |      MASTER-Tavrida | (03h 20m 05.86s , -06d 10m 34.8s) |   C |    60 | 16.2 |        
   54815 | 2021-08-21 22:53:33 |      MASTER-Tavrida | (03h 12m 55.02s , -08d 06m 16.1s) |   C |    60 | 16.3 |        
   55229 | 2021-08-21 23:00:27 |      MASTER-Tavrida | (03h 21m 00.76s , -08d 04m 15.3s) |   C |    60 | 16.3 |        
   55410 | 2021-08-21 23:03:28 |      MASTER-Tavrida | (03h 12m 06.09s , -06d 12m 19.0s) |   C |    60 | 16.8 |        
   55661 | 2021-08-21 23:07:39 |      MASTER-Tavrida | (03h 20m 05.24s , -06d 10m 15.9s) |   C |    60 | 16.6 |        
   56075 | 2021-08-21 23:14:33 |      MASTER-Tavrida | (03h 12m 54.77s , -08d 04m 12.7s) |   C |    60 | 16.8 |        
   56154 | 2021-08-21 23:15:52 |      MASTER-Tavrida | (03h 21m 06.28s , -08d 05m 06.5s) |   C |    60 | 16.5 |        
Filter C is a clear (unfiltred) band. 


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



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  ID = 4838
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 210821A ( Fermi GBM team, GCN 30671) errorbox  50201 sec after notice time and 50230 sec after trigger time at 2021-08-21 21:37:39 UT, with upper limit up to  12.6 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -34.8 deg. 

The galactic latitude b = -49 deg., longitude l = 190 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1696282

We obtain a following upper limits.  

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

   50261 | 2021-08-21 21:37:39 |   MASTER-Kislovodsk | (03h 06m 09.35s , -06d 43m 00.6s) |   C |    60 | 12.0 |        
   50421 | 2021-08-21 21:40:19 |   MASTER-Kislovodsk | (03h 05m 37.89s , -04d 47m 03.2s) |   C |    60 | 12.6 |        
   50742 | 2021-08-21 21:45:40 |   MASTER-Kislovodsk | (03h 06m 55.76s , -08d 34m 58.7s) |   C |    60 | 12.6 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2024