MASTER Net MASTER Database: GRB210110.64 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 MAXI GRB210110.64
Trignum 224516204
Trigger time 2021-01-10 15:14:44
Notice time 2021-01-10 16:31:16.557123
Coord, eb (11h 30m 54.48s , -41d 18m 54.0s) , 1
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

MASTER observatories and transients from them in error-field
Kislovodsk Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Amur Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tunka Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAFA Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
IAC Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
SAAO Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tavrida Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAGH Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
1522874 2021-01-10 16:31:16.557123 11h 30m 54.48s -41d 18m 54.0s MAXI 1 alert 224516204 6 134 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-01-10 15:14:44 (JD 2459225.135231)

Siderial time 1.111164 h

Ra 11:30:54.48 Dec -41:18:54.00
(172.727000d, -41.315000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -18.33 Azimuth: 313.62

Sun: Altitude: -61.27 Azimuth: 169.46

Moon: Altitude: -53.01 Azimuth: 232.77

Tunka

Object: Altitude: -31.59 Azimuth: 298.15

Sun: Altitude: -52.26 Azimuth: 131.02

Moon: Altitude: -60.20 Azimuth: 192.74

Kislovodsk

Object: Altitude: -68.71 Azimuth: 273.48

Sun: Altitude: -14.68 Azimuth: 73.55

Moon: Altitude: -41.24 Azimuth: 97.78

Tavrida

Object: Altitude: -74.79 Azimuth: 264.18

Sun: Altitude: -9.24 Azimuth: 68.23

Moon: Altitude: -35.09 Azimuth: 92.19

SAAO

Object: Altitude: -16.01 Azimuth: 354.43

Sun: Altitude: 29.65 Azimuth: 81.52

Moon: Altitude: 0.49 Azimuth: 63.43

IAC

Object: Altitude: -62.21 Azimuth: 54.09

Sun: Altitude: 31.77 Azimuth: 33.71

Moon: Altitude: 7.68 Azimuth: 59.29

Argentina

Object: Altitude: 15.67 Azimuth: 50.74

Sun: Altitude: 67.88 Azimuth: 248.92

Moon: Altitude: 74.16 Azimuth: 122.52

Mexico

Object: Altitude: 1.14 Azimuth: 38.49

Sun: Altitude: 9.47 Azimuth: 302.82

Moon: Altitude: 30.69 Azimuth: 331.20

Ural

Object: Altitude: -56.98 Azimuth: 261.60

Sun: Altitude: -27.22 Azimuth: 91.27

Moon: Altitude: -46.37 Azimuth: 126.82

Vostryakovo

Object: Altitude: -68.86 Azimuth: 238.38

Sun: Altitude: -15.08 Azimuth: 73.14

Moon: Altitude: -36.11 Azimuth: 102.93

Gal. latitude: 18.945553 Gal. longitude: 287.610472

Dist. to Sun: 95.399217

Dist. to Moon: 69.997708

Moon coord.: (255.303585 d, -22.475597 d)

Sun coord.: (291.970496 d, -21.908065 d)

Lunar disk: 0.085248

Lunar phase: 146.047806

Lunar bright limb: 96.336186

No SN in this field

2021-01-10 16:31:16 (JD 2459225.188380)

Siderial time 2.390212 h

Ra 11:30:54.48 Dec -41:18:54.00
(172.727000d, -41.315000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -10.43 Azimuth: 326.04

Sun: Altitude: -59.62 Azimuth: 205.73

Moon: Altitude: -42.69 Azimuth: 253.01

Tunka

Object: Altitude: -21.78 Azimuth: 309.94

Sun: Altitude: -58.96 Azimuth: 160.43

Moon: Altitude: -54.96 Azimuth: 223.17

Kislovodsk

Object: Altitude: -55.02 Azimuth: 283.07

Sun: Altitude: -28.24 Azimuth: 85.87

Moon: Altitude: -54.07 Azimuth: 114.43

Tavrida

Object: Altitude: -61.19 Azimuth: 277.31

Sun: Altitude: -22.30 Azimuth: 80.73

Moon: Altitude: -48.03 Azimuth: 106.96

SAAO

Object: Altitude: -12.42 Azimuth: 340.06

Sun: Altitude: 13.92 Azimuth: 72.67

Moon: Altitude: -12.58 Azimuth: 52.55

IAC

Object: Altitude: -74.19 Azimuth: 31.74

Sun: Altitude: 20.58 Azimuth: 49.10

Moon: Altitude: -6.90 Azimuth: 67.98

Argentina

Object: Altitude: 3.80 Azimuth: 42.49

Sun: Altitude: 79.72 Azimuth: 196.43

Moon: Altitude: 59.56 Azimuth: 99.32

Mexico

Object: Altitude: -10.10 Azimuth: 47.51

Sun: Altitude: 22.19 Azimuth: 315.71

Moon: Altitude: 35.75 Azimuth: 350.59

Ural

Object: Altitude: -46.58 Azimuth: 277.81

Sun: Altitude: -37.44 Azimuth: 108.49

Moon: Altitude: -53.08 Azimuth: 151.09

Vostryakovo

Object: Altitude: -58.62 Azimuth: 261.76

Sun: Altitude: -25.76 Azimuth: 88.28

Moon: Altitude: -45.87 Azimuth: 121.41

Gal. latitude: 18.945553 Gal. longitude: 287.610472

Dist. to Sun: 95.440545

Dist. to Moon: 70.504912

Moon coord.: (256.117141 d, -22.619610 d)

Sun coord.: (292.028226 d, -21.899994 d)

Lunar disk: 0.081822

Lunar phase: 146.757252

Lunar bright limb: 95.929670

No SN in this field

2021-01-10 17:31:16 (JD 2459225.230046)

Siderial time 3.392950 h

Ra 11:30:54.48 Dec -41:18:54.00
(172.727000d, -41.315000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -5.81 Azimuth: 336.44

Sun: Altitude: -53.78 Azimuth: 228.91

Moon: Altitude: -33.75 Azimuth: 265.56

Tunka

Object: Altitude: -15.18 Azimuth: 319.60

Sun: Altitude: -59.90 Azimuth: 187.92

Moon: Altitude: -48.00 Azimuth: 241.45

Kislovodsk

Object: Altitude: -44.61 Azimuth: 289.85

Sun: Altitude: -39.05 Azimuth: 96.42

Moon: Altitude: -62.80 Azimuth: 133.81

Tavrida

Object: Altitude: -50.71 Azimuth: 284.88

Sun: Altitude: -32.91 Azimuth: 90.91

Moon: Altitude: -57.40 Azimuth: 122.65

SAAO

Object: Altitude: -7.04 Azimuth: 329.99

Sun: Altitude: 2.10 Azimuth: 65.25

Moon: Altitude: -21.46 Azimuth: 42.20

IAC

Object: Altitude: -76.57 Azimuth: 346.83

Sun: Altitude: 9.93 Azimuth: 58.38

Moon: Altitude: -18.93 Azimuth: 73.78

Argentina

Object: Altitude: -4.17 Azimuth: 34.50

Sun: Altitude: 75.51 Azimuth: 130.24

Moon: Altitude: 47.42 Azimuth: 90.16

Mexico

Object: Altitude: -20.02 Azimuth: 53.07

Sun: Altitude: 30.11 Azimuth: 328.47

Moon: Altitude: 35.90 Azimuth: 6.99

Ural

Object: Altitude: -38.63 Azimuth: 288.72

Sun: Altitude: -44.73 Azimuth: 124.26

Moon: Altitude: -55.57 Azimuth: 173.57

Vostryakovo

Object: Altitude: -50.10 Azimuth: 274.54

Sun: Altitude: -34.23 Azimuth: 101.05

Moon: Altitude: -52.21 Azimuth: 139.31

Gal. latitude: 18.945553 Gal. longitude: 287.610472

Dist. to Sun: 95.472944

Dist. to Moon: 70.903888

Moon coord.: (256.755999 d, -22.729615 d)

Sun coord.: (292.073481 d, -21.893652 d)

Lunar disk: 0.079182

Lunar phase: 147.313246

Lunar bright limb: 95.606201

No SN in this field

2025-05-09 16:18:17 (JD 2460805.179363)

Siderial time 9.994753 h

Ra 11:30:54.48 Dec -41:18:54.00
(172.727000d, -41.315000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -18.73 Azimuth: 46.92

Sun: Altitude: -21.21 Azimuth: 193.62

Moon: Altitude: 19.60 Azimuth: 48.81

Tunka

Object: Altitude: -10.21 Azimuth: 31.13

Sun: Altitude: -20.06 Azimuth: 168.71

Moon: Altitude: 27.53 Azimuth: 23.92

Kislovodsk

Object: Altitude: 3.43 Azimuth: 346.63

Sun: Altitude: -0.54 Azimuth: 115.11

Moon: Altitude: 27.30 Azimuth: 315.15

Tavrida

Object: Altitude: 0.76 Azimuth: 340.48

Sun: Altitude: 5.47 Azimuth: 109.23

Moon: Altitude: 22.08 Azimuth: 307.69

SAAO

Object: Altitude: 57.37 Azimuth: 297.35

Sun: Altitude: -6.51 Azimuth: 106.57

Moon: Altitude: 28.67 Azimuth: 260.76

IAC

Object: Altitude: -9.41 Azimuth: 312.13

Sun: Altitude: 43.62 Azimuth: 87.57

Moon: Altitude: -11.02 Azimuth: 273.14

Argentina

Object: Altitude: -3.45 Azimuth: 324.65

Sun: Altitude: 40.62 Azimuth: 184.41

Moon: Altitude: -41.62 Azimuth: 320.19

Mexico

Object: Altitude: -77.35 Azimuth: 326.77

Sun: Altitude: 47.48 Azimuth: 277.96

Moon: Altitude: -64.24 Azimuth: 151.31

Ural

Object: Altitude: -8.35 Azimuth: 359.33

Sun: Altitude: -2.79 Azimuth: 128.84

Moon: Altitude: 22.52 Azimuth: 336.06

Vostryakovo

Object: Altitude: -8.59 Azimuth: 343.02

Sun: Altitude: 6.85 Azimuth: 110.98

Moon: Altitude: 16.94 Azimuth: 314.04

Gal. latitude: 18.945553 Gal. longitude: 287.610472

Dist. to Sun: 128.440418

Dist. to Moon: 38.378668

Moon coord.: (194.079803 d, -7.929748 d)

Sun coord.: (46.481328 d, 17.459212 d)

Lunar disk: 0.919995

Lunar phase: 32.860963

Lunar bright limb: 290.008265

No SN in this field
Recent coverage and limits telegrams

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

  ID = 3666
TYPE = 35
DAYS = 1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210110.64 (trigger No 224516204,11h 30m 38.40s , -41d 30m 36.0s, R=1) errorbox  14698 sec after notice time and 15987 sec after trigger time at 2021-01-10 19:41:11 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -20.2 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB210110.64 errorbox  37111 sec after notice time and 38400 sec after trigger time at 2021-01-11 01:54:44 UT, with upper limit up to  19.7 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.6 deg. 

The galactic latitude b = 19 deg., longitude l = 288 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1522841

We obtain a following upper limits.  

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

   16077 | 2021-01-10 19:41:11 |         MASTER-SAAO | (11h 25m 31.35s , -41d 24m 21.0s) |   C |   180 | 17.4 |        
   18414 | 2021-01-10 20:21:08 |         MASTER-SAAO | (11h 21m 14.50s , -41d 53m 29.4s) |   C |    60 | 17.4 |        
   18499 | 2021-01-10 20:22:33 |         MASTER-SAAO | (11h 21m 32.42s , -39d 55m 24.6s) |   C |    60 | 17.6 |        
   19652 | 2021-01-10 20:40:45 |         MASTER-SAAO | (11h 25m 40.69s , -41d 25m 32.8s) |   C |   180 | 18.0 |        
   22022 | 2021-01-10 21:21:15 |         MASTER-SAAO | (11h 21m 20.16s , -41d 55m 37.9s) |   C |    60 | 17.0 |        
   22104 | 2021-01-10 21:22:38 |         MASTER-SAAO | (11h 26m 45.97s , -41d 53m 53.0s) |   C |    60 | 16.8 |        
   22186 | 2021-01-10 21:23:59 |         MASTER-SAAO | (11h 21m 36.19s , -39d 54m 42.6s) |   C |    60 | 17.6 |        
   22267 | 2021-01-10 21:25:20 |         MASTER-SAAO | (11h 26m 50.22s , -39d 53m 38.5s) |   C |    60 | 17.8 |        
   22742 | 2021-01-10 21:32:16 |         MASTER-SAAO | (11h 25m 41.75s , -41d 26m 01.3s) |   C |   180 | 18.4 |        
   38490 | 2021-01-11 01:54:44 |         MASTER-OAFA | (11h 30m 08.64s , -42d 04m 19.4s) |   C |   180 | 18.1 |        
   38689 | 2021-01-11 01:58:03 |         MASTER-OAFA | (11h 30m 02.40s , -42d 05m 09.3s) |   C |   180 | 18.1 |        
   39089 | 2021-01-11 02:05:42 |         MASTER-OAFA | (11h 22m 28.86s , -42d 34m 21.4s) |   C |    60 | 17.7 |        
   39256 | 2021-01-11 02:08:29 |         MASTER-OAFA | (11h 22m 53.75s , -40d 35m 19.7s) |   C |    60 | 17.7 |        
   42120 | 2021-01-11 02:55:14 |         MASTER-OAFA | (11h 30m 05.27s , -42d 04m 31.1s) |   C |   180 | 18.5 |        
   42300 | 2021-01-11 02:55:14 |         MASTER-OAFA | (11h 30m 05.27s , -42d 04m 31.1s) |   C |   540 | 19.2 |  Coadd 
   42320 | 2021-01-11 02:58:33 |         MASTER-OAFA | (11h 30m 00.20s , -42d 05m 19.7s) |   C |   180 | 18.7 |        
   42519 | 2021-01-11 03:01:53 |         MASTER-OAFA | (11h 30m 00.47s , -42d 04m 20.1s) |   C |   180 | 18.5 |        
   43178 | 2021-01-11 03:13:51 |         MASTER-OAFA | (11h 22m 21.07s , -42d 35m 29.2s) |   C |    60 | 18.2 |        
   43257 | 2021-01-11 03:15:11 |         MASTER-OAFA | (11h 33m 07.12s , -42d 34m 24.2s) |   C |    60 | 18.3 |        
   43425 | 2021-01-11 03:17:59 |         MASTER-OAFA | (11h 22m 50.83s , -40d 36m 34.7s) |   C |    60 | 18.4 |        
   43505 | 2021-01-11 03:19:18 |         MASTER-OAFA | (11h 33m 21.34s , -40d 36m 02.9s) |   C |    60 | 18.3 |        
   46005 | 2021-01-11 04:00:59 |         MASTER-OAFA | (11h 22m 21.34s , -42d 35m 31.0s) |   C |    60 | 18.3 |        
   46085 | 2021-01-11 04:02:18 |         MASTER-OAFA | (11h 33m 05.68s , -42d 34m 27.3s) |   C |    60 | 18.4 |        
   46164 | 2021-01-11 04:03:38 |         MASTER-OAFA | (11h 22m 55.51s , -40d 35m 27.0s) |   C |    60 | 18.5 |        
   46244 | 2021-01-11 04:04:57 |         MASTER-OAFA | (11h 33m 14.98s , -40d 36m 24.2s) |   C |    60 | 18.5 |        
   46384 | 2021-01-11 04:06:17 |         MASTER-OAFA | (11h 29m 31.22s , -42d 06m 39.5s) |   C |   180 | 19.0 |        
   48091 | 2021-01-11 04:35:44 |         MASTER-OAFA | (11h 33m 11.76s , -42d 34m 34.9s) |   C |    60 | 18.3 |        
   48170 | 2021-01-11 04:37:04 |         MASTER-OAFA | (11h 33m 15.29s , -40d 35m 11.2s) |   C |    60 | 18.5 |        
   48310 | 2021-01-11 04:38:23 |         MASTER-OAFA | (11h 29m 24.52s , -42d 04m 51.4s) |   C |   180 | 18.9 |        
   49312 | 2021-01-11 04:55:05 |         MASTER-OAFA | (11h 30m 01.31s , -42d 06m 01.5s) |   C |   180 | 18.9 |        
   49492 | 2021-01-11 04:55:05 |         MASTER-OAFA | (11h 30m 01.31s , -42d 06m 01.5s) |   C |   540 | 19.7 |  Coadd 
   49511 | 2021-01-11 04:58:25 |         MASTER-OAFA | (11h 30m 04.78s , -42d 04m 30.1s) |   C |   180 | 19.0 |        
   49711 | 2021-01-11 05:01:44 |         MASTER-OAFA | (11h 29m 58.06s , -42d 05m 16.2s) |   C |   180 | 19.1 |        
   51111 | 2021-01-11 05:25:04 |         MASTER-OAFA | (11h 29m 31.31s , -42d 05m 40.3s) |   C |   180 | 18.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3665
TYPE = 35
DAYS = 0.5


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210110.64 (trigger No 224516204,11h 30m 38.40s , -41d 30m 36.0s, R=1) errorbox  14698 sec after notice time and 15987 sec after trigger time at 2021-01-10 19:41:11 UT, with upper limit up to  18.4 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -20.2 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) started inspect of the MAXI GRB210110.64 errorbox  37111 sec after notice time and 38400 sec after trigger time at 2021-01-11 01:54:44 UT, with upper limit up to  19.2 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -23.6 deg. 

The galactic latitude b = 19 deg., longitude l = 288 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1522841

We obtain a following upper limits.  

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

   16077 | 2021-01-10 19:41:11 |         MASTER-SAAO | (11h 25m 31.35s , -41d 24m 21.0s) |   C |   180 | 17.4 |        
   18414 | 2021-01-10 20:21:08 |         MASTER-SAAO | (11h 21m 14.50s , -41d 53m 29.4s) |   C |    60 | 17.4 |        
   18499 | 2021-01-10 20:22:33 |         MASTER-SAAO | (11h 21m 32.42s , -39d 55m 24.6s) |   C |    60 | 17.6 |        
   19652 | 2021-01-10 20:40:45 |         MASTER-SAAO | (11h 25m 40.69s , -41d 25m 32.8s) |   C |   180 | 18.0 |        
   22022 | 2021-01-10 21:21:15 |         MASTER-SAAO | (11h 21m 20.16s , -41d 55m 37.9s) |   C |    60 | 17.0 |        
   22104 | 2021-01-10 21:22:38 |         MASTER-SAAO | (11h 26m 45.97s , -41d 53m 53.0s) |   C |    60 | 16.8 |        
   22186 | 2021-01-10 21:23:59 |         MASTER-SAAO | (11h 21m 36.19s , -39d 54m 42.6s) |   C |    60 | 17.6 |        
   22267 | 2021-01-10 21:25:20 |         MASTER-SAAO | (11h 26m 50.22s , -39d 53m 38.5s) |   C |    60 | 17.8 |        
   22742 | 2021-01-10 21:32:16 |         MASTER-SAAO | (11h 25m 41.75s , -41d 26m 01.3s) |   C |   180 | 18.4 |        
   38490 | 2021-01-11 01:54:44 |         MASTER-OAFA | (11h 30m 08.64s , -42d 04m 19.4s) |   C |   180 | 18.1 |        
   38689 | 2021-01-11 01:58:03 |         MASTER-OAFA | (11h 30m 02.40s , -42d 05m 09.3s) |   C |   180 | 18.1 |        
   39089 | 2021-01-11 02:05:42 |         MASTER-OAFA | (11h 22m 28.86s , -42d 34m 21.4s) |   C |    60 | 17.7 |        
   39256 | 2021-01-11 02:08:29 |         MASTER-OAFA | (11h 22m 53.75s , -40d 35m 19.7s) |   C |    60 | 17.7 |        
   42120 | 2021-01-11 02:55:14 |         MASTER-OAFA | (11h 30m 05.27s , -42d 04m 31.1s) |   C |   180 | 18.5 |        
   42300 | 2021-01-11 02:55:14 |         MASTER-OAFA | (11h 30m 05.27s , -42d 04m 31.1s) |   C |   540 | 19.2 |  Coadd 
   42320 | 2021-01-11 02:58:33 |         MASTER-OAFA | (11h 30m 00.20s , -42d 05m 19.7s) |   C |   180 | 18.7 |        
   42519 | 2021-01-11 03:01:53 |         MASTER-OAFA | (11h 30m 00.47s , -42d 04m 20.1s) |   C |   180 | 18.5 |        
   43178 | 2021-01-11 03:13:51 |         MASTER-OAFA | (11h 22m 21.07s , -42d 35m 29.2s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3664
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210110.64 (trigger No 224516204,11h 30m 38.40s , -41d 30m 36.0s, R=1) errorbox  14698 sec after notice time and 15987 sec after trigger time at 2021-01-10 19:41:11 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -20.2 deg. 

The galactic latitude b = 19 deg., longitude l = 288 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1522841

We obtain a following upper limits.  

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

   16077 | 2021-01-10 19:41:11 |         MASTER-SAAO | (11h 25m 31.35s , -41d 24m 21.0s) |   C |   180 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3663
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210110.64 (trigger No 224516204,11h 30m 38.40s , -41d 30m 36.0s, R=1) errorbox  14698 sec after notice time and 15987 sec after trigger time at 2021-01-10 19:41:11 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -20.2 deg. 

The galactic latitude b = 19 deg., longitude l = 288 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1522841

We obtain a following upper limits.  

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

   16077 | 2021-01-10 19:41:11 |         MASTER-SAAO | (11h 25m 31.35s , -41d 24m 21.0s) |   C |   180 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3662
TYPE = 34
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the MAXI GRB210110.64 (trigger No 224516204,11h 30m 38.40s , -41d 30m 36.0s, R=1) errorbox  14698 sec after notice time and 15987 sec after trigger time at 2021-01-10 19:41:11 UT, with upper limit up to  17.4 mag. The observations began at zenith distance = 80 deg. The sun  altitude  is -20.2 deg. 

The galactic latitude b = 19 deg., longitude l = 288 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1522841

We obtain a following upper limits.  

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

   16077 | 2021-01-10 19:41:11 |         MASTER-SAAO | (11h 25m 31.35s , -41d 24m 21.0s) |   C |   180 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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

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