MASTER Net MASTER Database: GRB210228.06 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 GRB210228.06
Trignum 636168178
Trigger time 2021-02-28 01:22:53.97
Notice time 2021-02-28 05:08:02.24688
Coord, eb (18h 53m 55.20s , -43d 07m 48.0s) , 2.29
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
1557639 2021-02-28 05:08:02.24688 18h 53m 55.20s -43d 07m 48.0s FERMI 2.29 alert 636168178 2 115 alert

DAYS:

MASTER optical transients in this field
MASTER OT (J2000.0) Сoordinates Datetime Published Mag Site Image
J185305.87-491009.2 (18h 53m 05.79s , -49d 10m 08.7s) 2021-03-02 00:39:35.136 AT2021efs on 2021-03-03 09:30:05.415819 15.997 SAAO Transient on SAAO

Synchronous WFC images
Distance datetime coord2000 observatory camera links
105.5 2021-02-28 01:22:49.697 14h 27m 23.00s +44d 00m 57.0s Kislovodsk 29007 Database Kislovodsk
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-02-28 01:22:53 (JD 2459273.557558)

Siderial time 14.428820 h

Ra 18:53:55.20 Dec -43:07:48.00
(283.480000d, -43.130000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -5.54 Azimuth: 16.52

Sun: Altitude: 24.34 Azimuth: 321.83

Moon: Altitude: -18.79 Azimuth: 131.96

Tunka

Object: Altitude: -4.95 Azimuth: 358.83

Sun: Altitude: 11.80 Azimuth: 299.81

Moon: Altitude: -5.00 Azimuth: 111.42

Kislovodsk

Object: Altitude: -13.08 Azimuth: 318.51

Sun: Altitude: -26.77 Azimuth: 254.60

Moon: Altitude: 34.80 Azimuth: 66.31

Tavrida

Object: Altitude: -18.02 Azimuth: 313.61

Sun: Altitude: -32.20 Azimuth: 247.00

Moon: Altitude: 39.72 Azimuth: 57.53

SAAO

Object: Altitude: 25.60 Azimuth: 306.43

Sun: Altitude: -35.30 Azimuth: 310.71

Moon: Altitude: 40.82 Azimuth: 142.40

IAC

Object: Altitude: -41.05 Azimuth: 304.10

Sun: Altitude: -69.71 Azimuth: 183.85

Moon: Altitude: 68.74 Azimuth: 333.42

Argentina

Object: Altitude: -14.87 Azimuth: 355.47

Sun: Altitude: -26.77 Azimuth: 60.17

Moon: Altitude: 17.95 Azimuth: 246.78

Mexico

Object: Altitude: -59.82 Azimuth: 56.49

Sun: Altitude: -2.00 Azimuth: 81.80

Moon: Altitude: -6.57 Azimuth: 255.34

Ural

Object: Altitude: -17.06 Azimuth: 327.25

Sun: Altitude: -13.60 Azimuth: 263.80

Moon: Altitude: 20.16 Azimuth: 74.93

Vostryakovo

Object: Altitude: -23.56 Azimuth: 312.94

Sun: Altitude: -25.63 Azimuth: 245.08

Moon: Altitude: 31.76 Azimuth: 55.04

Gal. latitude: -19.179381 Gal. longitude: 353.580271

Dist. to Sun: 61.033709

Dist. to Moon: 111.943644

Moon coord.: (171.755644 d, 8.994732 d)

Sun coord.: (340.955870 d, -8.053806 d)

Lunar disk: 0.991320

Lunar phase: 10.691553

Lunar bright limb: 85.786456

No SN in this field

2021-02-28 05:08:02 (JD 2459273.713912)

Siderial time 18.191594 h

Ra 18:53:55.20 Dec -43:07:48.00
(283.480000d, -43.130000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -26.06 Azimuth: 52.95

Sun: Altitude: 28.73 Azimuth: 24.61

Moon: Altitude: -31.08 Azimuth: 190.30

Tunka

Object: Altitude: -16.11 Azimuth: 38.39

Sun: Altitude: 30.15 Azimuth: 356.82

Moon: Altitude: -28.63 Azimuth: 162.43

Kislovodsk

Object: Altitude: 2.97 Azimuth: 355.84

Sun: Altitude: 13.00 Azimuth: 294.75

Moon: Altitude: -4.30 Azimuth: 105.50

Tavrida

Object: Altitude: 1.23 Azimuth: 349.68

Sun: Altitude: 6.98 Azimuth: 288.57

Moon: Altitude: 1.86 Azimuth: 99.56

SAAO

Object: Altitude: 65.96 Azimuth: 304.44

Sun: Altitude: 8.44 Azimuth: 274.15

Moon: Altitude: 2.16 Azimuth: 100.99

IAC

Object: Altitude: -2.86 Azimuth: 318.64

Sun: Altitude: -32.18 Azimuth: 261.25

Moon: Altitude: 43.17 Azimuth: 73.39

Argentina

Object: Altitude: 4.21 Azimuth: 319.55

Sun: Altitude: -49.94 Azimuth: 352.56

Moon: Altitude: 49.40 Azimuth: 192.09

Mexico

Object: Altitude: -69.19 Azimuth: 311.46

Sun: Altitude: -49.12 Azimuth: 116.58

Moon: Altitude: 39.00 Azimuth: 286.04

Ural

Object: Altitude: -10.62 Azimuth: 8.38

Sun: Altitude: 14.80 Azimuth: 312.22

Moon: Altitude: -9.15 Azimuth: 120.69

Vostryakovo

Object: Altitude: -8.91 Azimuth: 352.33

Sun: Altitude: 5.51 Azimuth: 292.68

Moon: Altitude: 1.47 Azimuth: 102.16

Gal. latitude: -19.179381 Gal. longitude: 353.580271

Dist. to Sun: 61.178036

Dist. to Moon: 109.819045

Moon coord.: (173.840140 d, 8.089074 d)

Sun coord.: (341.102791 d, -7.994727 d)

Lunar disk: 0.988001

Lunar phase: 12.577559

Lunar bright limb: 90.470063

No SN in this field

2021-02-28 06:08:02 (JD 2459273.755579)

Siderial time 19.194332 h

Ra 18:53:55.20 Dec -43:07:48.00
(283.480000d, -43.130000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -34.13 Azimuth: 61.54

Sun: Altitude: 23.61 Azimuth: 40.16

Moon: Altitude: -28.39 Azimuth: 206.55

Tunka

Object: Altitude: -22.47 Azimuth: 47.86

Sun: Altitude: 29.30 Azimuth: 13.91

Moon: Altitude: -30.34 Azimuth: 178.82

Kislovodsk

Object: Altitude: 2.72 Azimuth: 6.81

Sun: Altitude: 22.32 Azimuth: 306.91

Moon: Altitude: -14.26 Azimuth: 115.99

Tavrida

Object: Altitude: 2.14 Azimuth: 0.61

Sun: Altitude: 16.69 Azimuth: 300.07

Moon: Altitude: -8.26 Azimuth: 109.76

SAAO

Object: Altitude: 75.50 Azimuth: 321.36

Sun: Altitude: 21.09 Azimuth: 266.07

Moon: Altitude: -9.84 Azimuth: 93.10

IAC

Object: Altitude: 5.25 Azimuth: 326.02

Sun: Altitude: -19.02 Azimuth: 268.92

Moon: Altitude: 30.59 Azimuth: 82.06

Argentina

Object: Altitude: 13.06 Azimuth: 313.00

Sun: Altitude: -45.94 Azimuth: 331.12

Moon: Altitude: 49.86 Azimuth: 169.87

Mexico

Object: Altitude: -58.83 Azimuth: 303.13

Sun: Altitude: -59.59 Azimuth: 134.89

Moon: Altitude: 50.35 Azimuth: 298.48

Ural

Object: Altitude: -12.58 Azimuth: 19.39

Sun: Altitude: 20.12 Azimuth: 326.77

Moon: Altitude: -15.64 Azimuth: 133.80

Vostryakovo

Object: Altitude: -8.59 Azimuth: 3.41

Sun: Altitude: 12.95 Azimuth: 305.72

Moon: Altitude: -6.54 Azimuth: 114.08

Gal. latitude: -19.179381 Gal. longitude: 353.580271

Dist. to Sun: 61.216502

Dist. to Moon: 109.251505

Moon coord.: (174.394731 d, 7.845561 d)

Sun coord.: (341.141935 d, -7.978975 d)

Lunar disk: 0.987006

Lunar phase: 13.091106

Lunar bright limb: 91.497983

No SN in this field

2024-10-18 03:35:09 (JD 2460601.649410)

Siderial time 7.901947 h

Ra 18:53:55.20 Dec -43:07:48.00
(283.480000d, -43.130000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -23.97 Azimuth: 309.49

Sun: Altitude: 29.85 Azimuth: 6.05

Moon: Altitude: -24.29 Azimuth: 176.92

Tunka

Object: Altitude: -37.72 Azimuth: 294.50

Sun: Altitude: 26.38 Azimuth: 338.90

Moon: Altitude: -18.77 Azimuth: 152.13

Kislovodsk

Object: Altitude: -75.53 Azimuth: 274.49

Sun: Altitude: 0.70 Azimuth: 284.10

Moon: Altitude: 9.04 Azimuth: 102.63

Tavrida

Object: Altitude: -81.61 Azimuth: 263.03

Sun: Altitude: -5.47 Azimuth: 278.17

Moon: Altitude: 15.21 Azimuth: 96.70

SAAO

Object: Altitude: -14.47 Azimuth: 1.33

Sun: Altitude: -4.25 Azimuth: 284.25

Moon: Altitude: 7.54 Azimuth: 113.58

IAC

Object: Altitude: -55.38 Azimuth: 54.07

Sun: Altitude: -47.00 Azimuth: 252.65

Moon: Altitude: 56.80 Azimuth: 74.10

Argentina

Object: Altitude: 22.38 Azimuth: 52.08

Sun: Altitude: -47.12 Azimuth: 16.78

Moon: Altitude: 39.20 Azimuth: 204.83

Mexico

Object: Altitude: 4.21 Azimuth: 32.38

Sun: Altitude: -36.87 Azimuth: 101.95

Moon: Altitude: 32.67 Azimuth: 271.10

Ural

Object: Altitude: -62.98 Azimuth: 255.05

Sun: Altitude: 6.09 Azimuth: 298.31

Moon: Altitude: 2.86 Azimuth: 114.20

Vostryakovo

Object: Altitude: -74.29 Azimuth: 225.11

Sun: Altitude: -4.75 Azimuth: 280.11

Moon: Altitude: 14.03 Azimuth: 96.78

Gal. latitude: -19.179381 Gal. longitude: 353.580271

Dist. to Sun: 76.436439

Dist. to Moon: 113.348082

Moon coord.: (31.302485 d, 15.344294 d)

Sun coord.: (203.076397 d, -9.648375 d)

Lunar disk: 0.992714

Lunar phase: 9.793542

Lunar bright limb: 55.619825

No SN in this field
Recent coverage and limits telegrams

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

  ID = 3823
TYPE = 35
DAYS = 2


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB210228.06 (trigger No 636168178,18h 53m 55.20s , -43d 07m 48.0s, R=2.29) errorbox  15502 sec after notice time and 29006 sec after trigger time at 2021-02-28 09:26:20 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -12.9 deg. 

MASTER-SAAO robotic telescope  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB210228.06 errorbox  74819 sec after notice time and 1 days 1922 sec after trigger time at 2021-03-01 01:54:56 UT, with upper limit up to  17.7 mag. The observations began at zenith distance = 58 deg. The sun  altitude  is -30.9 deg. 

The galactic latitude b = -19 deg., longitude l = 354 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1557639

We obtain a following upper limits.  

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

   29036 | 2021-02-28 09:26:20 |         MASTER-OAFA | (18h 54m 03.49s , -42d 41m 37.2s) |   C |    60 | 16.2 |        
   29116 | 2021-02-28 09:27:39 |         MASTER-OAFA | (19h 04m 56.17s , -42d 42m 56.1s) |   C |    60 | 17.1 |        
   29401 | 2021-02-28 09:32:25 |         MASTER-OAFA | (19h 09m 26.91s , -44d 42m 22.8s) |   C |    60 | 17.1 |        
   29691 | 2021-02-28 09:37:15 |         MASTER-OAFA | (19h 04m 11.51s , -46d 43m 00.3s) |   C |    60 | 16.9 |        
   29977 | 2021-02-28 09:42:01 |         MASTER-OAFA | (18h 54m 11.27s , -42d 42m 38.0s) |   C |    60 | 16.5 |        
   30056 | 2021-02-28 09:43:20 |         MASTER-OAFA | (19h 04m 52.39s , -42d 43m 56.5s) |   C |    60 | 16.3 |        
   30136 | 2021-02-28 09:44:40 |         MASTER-OAFA | (19h 01m 59.69s , -40d 41m 58.5s) |   C |    60 | 16.2 |        
   88353 | 2021-03-01 01:54:56 |         MASTER-SAAO | (18h 48m 36.48s , -43d 03m 52.5s) |   C |    60 | 14.3 |        
   88432 | 2021-03-01 01:56:16 |         MASTER-SAAO | (18h 55m 36.43s , -41d 04m 08.3s) |   C |    60 | 14.0 |        
   88514 | 2021-03-01 01:57:38 |         MASTER-SAAO | (18h 42m 35.19s , -45d 03m 43.2s) |   C |    60 | 14.6 |        
   88594 | 2021-03-01 01:58:58 |         MASTER-SAAO | (18h 33m 56.22s , -41d 05m 35.7s) |   C |    60 | 15.1 |        
   88674 | 2021-03-01 02:00:17 |         MASTER-SAAO | (19h 05m 42.33s , -45d 04m 18.1s) |   C |    60 | 14.1 |        
   88768 | 2021-03-01 02:01:51 |         MASTER-SAAO | (19h 10m 56.18s , -43d 04m 22.3s) |   C |    60 | 14.6 |        
   94319 | 2021-03-01 03:34:22 |         MASTER-SAAO | (19h 10m 48.96s , -43d 06m 35.7s) |   C |    60 | 17.3 |        
   94558 | 2021-03-01 03:38:21 |         MASTER-SAAO | (18h 52m 47.06s , -39d 05m 10.5s) |   C |    60 | 17.2 |        
   94877 | 2021-03-01 03:43:40 |         MASTER-SAAO | (18h 37m 14.44s , -43d 04m 43.1s) |   C |    60 | 17.0 |        
   95036 | 2021-03-01 03:46:20 |         MASTER-SAAO | (18h 49m 20.46s , -47d 07m 01.7s) |   C |    60 | 16.9 |        
  170072 | 2021-03-02 00:36:55 |         MASTER-SAAO | (19h 01m 45.28s , -47d 03m 07.9s) |   C |    60 | 17.7 |        
  171532 | 2021-03-02 01:01:15 |         MASTER-SAAO | (19h 01m 45.00s , -47d 03m 20.2s) |   C |    60 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3821
TYPE = 35
DAYS = 1


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB210228.06 (trigger No 636168178,18h 53m 55.20s , -43d 07m 48.0s, R=2.29) errorbox  15502 sec after notice time and 29006 sec after trigger time at 2021-02-28 09:26:20 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -12.9 deg. 

The galactic latitude b = -19 deg., longitude l = 354 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1557639

We obtain a following upper limits.  

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

   29036 | 2021-02-28 09:26:20 |         MASTER-OAFA | (18h 54m 03.49s , -42d 41m 37.2s) |   C |    60 | 16.2 |        
   29116 | 2021-02-28 09:27:39 |         MASTER-OAFA | (19h 04m 56.17s , -42d 42m 56.1s) |   C |    60 | 17.1 |        
   29401 | 2021-02-28 09:32:25 |         MASTER-OAFA | (19h 09m 26.91s , -44d 42m 22.8s) |   C |    60 | 17.1 |        
   29691 | 2021-02-28 09:37:15 |         MASTER-OAFA | (19h 04m 11.51s , -46d 43m 00.3s) |   C |    60 | 16.9 |        
   29977 | 2021-02-28 09:42:01 |         MASTER-OAFA | (18h 54m 11.27s , -42d 42m 38.0s) |   C |    60 | 16.5 |        
   30056 | 2021-02-28 09:43:20 |         MASTER-OAFA | (19h 04m 52.39s , -42d 43m 56.5s) |   C |    60 | 16.3 |        
   30136 | 2021-02-28 09:44:40 |         MASTER-OAFA | (19h 01m 59.69s , -40d 41m 58.5s) |   C |    60 | 16.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3817
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB210228.06 (trigger No 636168178,18h 53m 55.20s , -43d 07m 48.0s, R=2.29) errorbox  15502 sec after notice time and 29006 sec after trigger time at 2021-02-28 09:26:20 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -12.9 deg. 

The galactic latitude b = -19 deg., longitude l = 354 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1557639

We obtain a following upper limits.  

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

   29036 | 2021-02-28 09:26:20 |         MASTER-OAFA | (18h 54m 03.49s , -42d 41m 37.2s) |   C |    60 | 16.2 |        
   29116 | 2021-02-28 09:27:39 |         MASTER-OAFA | (19h 04m 56.17s , -42d 42m 56.1s) |   C |    60 | 17.1 |        
   29401 | 2021-02-28 09:32:25 |         MASTER-OAFA | (19h 09m 26.91s , -44d 42m 22.8s) |   C |    60 | 17.1 |        
   29691 | 2021-02-28 09:37:15 |         MASTER-OAFA | (19h 04m 11.51s , -46d 43m 00.3s) |   C |    60 | 16.9 |        
   29977 | 2021-02-28 09:42:01 |         MASTER-OAFA | (18h 54m 11.27s , -42d 42m 38.0s) |   C |    60 | 16.5 |        
   30056 | 2021-02-28 09:43:20 |         MASTER-OAFA | (19h 04m 52.39s , -42d 43m 56.5s) |   C |    60 | 16.3 |        
   30136 | 2021-02-28 09:44:40 |         MASTER-OAFA | (19h 01m 59.69s , -40d 41m 58.5s) |   C |    60 | 16.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3816
TYPE = 35
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB210228.06 (trigger No 636168178,18h 53m 55.20s , -43d 07m 48.0s, R=2.29) errorbox  15502 sec after notice time and 29006 sec after trigger time at 2021-02-28 09:26:20 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -12.9 deg. 

The galactic latitude b = -19 deg., longitude l = 354 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1557639

We obtain a following upper limits.  

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

   29036 | 2021-02-28 09:26:20 |         MASTER-OAFA | (18h 54m 03.49s , -42d 41m 37.2s) |   C |    60 | 16.2 |        
   29116 | 2021-02-28 09:27:39 |         MASTER-OAFA | (19h 04m 56.17s , -42d 42m 56.1s) |   C |    60 | 17.1 |        
   29401 | 2021-02-28 09:32:25 |         MASTER-OAFA | (19h 09m 26.91s , -44d 42m 22.8s) |   C |    60 | 17.1 |        
   29691 | 2021-02-28 09:37:15 |         MASTER-OAFA | (19h 04m 11.51s , -46d 43m 00.3s) |   C |    60 | 16.9 |        
   29977 | 2021-02-28 09:42:01 |         MASTER-OAFA | (18h 54m 11.27s , -42d 42m 38.0s) |   C |    60 | 16.5 |        
   30056 | 2021-02-28 09:43:20 |         MASTER-OAFA | (19h 04m 52.39s , -42d 43m 56.5s) |   C |    60 | 16.3 |        
   30136 | 2021-02-28 09:44:40 |         MASTER-OAFA | (19h 01m 59.69s , -40d 41m 58.5s) |   C |    60 | 16.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 3815
TYPE = 34
DAYS = 0


MASTER-OAFA robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Argentina (OAFA observatory of San Juan National University) started inspect of the FERMI GRB210228.06 (trigger No 636168178,18h 53m 55.20s , -43d 07m 48.0s, R=2.29) errorbox  15502 sec after notice time and 29006 sec after trigger time at 2021-02-28 09:26:20 UT, with upper limit up to  17.1 mag. Observations started at twilight.  The observations began at zenith distance = 43 deg. The sun  altitude  is -12.9 deg. 

The galactic latitude b = -19 deg., longitude l = 354 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1557639

We obtain a following upper limits.  

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

   29036 | 2021-02-28 09:26:20 |         MASTER-OAFA | (18h 54m 03.49s , -42d 41m 37.2s) |   C |    60 | 16.2 |        
   29116 | 2021-02-28 09:27:39 |         MASTER-OAFA | (19h 04m 56.17s , -42d 42m 56.1s) |   C |    60 | 17.1 |        
   29401 | 2021-02-28 09:32:25 |         MASTER-OAFA | (19h 09m 26.91s , -44d 42m 22.8s) |   C |    60 | 17.1 |        
   29691 | 2021-02-28 09:37:15 |         MASTER-OAFA | (19h 04m 11.51s , -46d 43m 00.3s) |   C |    60 | 16.9 |        
   29977 | 2021-02-28 09:42:01 |         MASTER-OAFA | (18h 54m 11.27s , -42d 42m 38.0s) |   C |    60 | 16.5 |        
   30056 | 2021-02-28 09:43:20 |         MASTER-OAFA | (19h 04m 52.39s , -42d 43m 56.5s) |   C |    60 | 16.3 |        
   30136 | 2021-02-28 09:44:40 |         MASTER-OAFA | (19h 01m 59.69s , -40d 41m 58.5s) |   C |    60 | 16.2 |        
Filter C is a clear (unfiltred) band. 


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

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