MASTER Net MASTER Database: GRB250211.89 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 INTEGRAL GRB250211.89
Trignum 11044
Trigger time 2025-02-11 21:27:57.77
Notice time 2025-02-11 21:28:12.599917
Coord, eb (18h 25m 33.49s , -31d 57m 36.2s) , 0.0533333
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You are viewing outdated information, relevant error box is here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
2775998 2025-02-12 07:47:48.651206 18h 25m 30.85s -31d 57m 54.1s INTEGRAL 0.0333333 alert 11044 3 55 alert
2775674 2025-02-11 21:31:19.301633 18h 25m 28.92s -31d 58m 30.0s INTEGRAL 0.048 alert 11044 2 54 alert
2775667 2025-02-11 21:28:14.841007 18h 25m 33.49s -31d 57m 36.2s INTEGRAL 0.0533333 alert 11044 1 53 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

2025-02-11 21:27:57 (JD 2460718.394410)

Siderial time 9.453240 h

Ra 18:25:33.49 Dec -31:57:36.20
(276.389542d, -31.960056d)

Rise 2025-02-12 07:39:30

Transit 2025-02-12 09:24:50

Set 2025-02-12 11:10:12

Amur

Object: Altitude: -1.29 Azimuth: 323.33

Sun: Altitude: -12.97 Azimuth: 276.12

Moon: Altitude: 13.10 Azimuth: 105.12

Tunka

Object: Altitude: -13.25 Azimuth: 305.46

Sun: Altitude: -28.11 Azimuth: 256.07

Moon: Altitude: 28.45 Azimuth: 86.03

Kislovodsk

Object: Altitude: -49.24 Azimuth: 270.68

Sun: Altitude: -60.07 Azimuth: 182.53

Moon: Altitude: 64.99 Azimuth: 18.36

Tavrida

Object: Altitude: -55.27 Azimuth: 263.04

Sun: Altitude: -58.50 Azimuth: 166.52

Moon: Altitude: 64.94 Azimuth: 359.17

SAAO

Object: Altitude: -20.22 Azimuth: 334.35

Sun: Altitude: -39.83 Azimuth: 26.17

Moon: Altitude: 36.35 Azimuth: 195.93

IAC

Object: Altitude: -81.62 Azimuth: 61.96

Sun: Altitude: -34.73 Azimuth: 92.46

Moon: Altitude: 43.04 Azimuth: 268.83

Argentina

Object: Altitude: -3.71 Azimuth: 48.37

Sun: Altitude: 24.56 Azimuth: 88.51

Moon: Altitude: -21.54 Azimuth: 259.56

Mexico

Object: Altitude: -6.58 Azimuth: 56.46

Sun: Altitude: 37.48 Azimuth: 35.58

Moon: Altitude: -29.03 Azimuth: 218.40

Ural

Object: Altitude: -38.46 Azimuth: 271.00

Sun: Altitude: -44.60 Azimuth: 205.38

Moon: Altitude: 48.27 Azimuth: 36.96

Vostryakovo

Object: Altitude: -50.61 Azimuth: 252.79

Sun: Altitude: -48.37 Azimuth: 175.01

Moon: Altitude: 54.20 Azimuth: 5.51

Gal. latitude: -9.595218 Gal. longitude: 1.865731

Dist. to Sun: 48.173854

Dist. to Moon: 140.372981

Moon coord.: (138.570662 d, 19.675379 d)

Sun coord.: (325.404314 d, -13.833926 d)

Lunar disk: 0.994186

Lunar phase: 8.745811

Lunar bright limb: 310.650974

No SN in this field

2025-02-11 21:28:12 (JD 2460718.394583)

Siderial time 9.457418 h

Ra 18:25:33.49 Dec -31:57:36.20
(276.389542d, -31.960056d)

Rise 2025-02-12 07:39:30

Transit 2025-02-12 09:24:50

Set 2025-02-12 11:10:12

Amur

Object: Altitude: -1.26 Azimuth: 323.38

Sun: Altitude: -12.93 Azimuth: 276.17

Moon: Altitude: 13.06 Azimuth: 105.17

Tunka

Object: Altitude: -13.22 Azimuth: 305.50

Sun: Altitude: -28.08 Azimuth: 256.13

Moon: Altitude: 28.41 Azimuth: 86.07

Kislovodsk

Object: Altitude: -49.19 Azimuth: 270.72

Sun: Altitude: -60.06 Azimuth: 182.65

Moon: Altitude: 64.97 Azimuth: 18.49

Tavrida

Object: Altitude: -55.22 Azimuth: 263.10

Sun: Altitude: -58.51 Azimuth: 166.63

Moon: Altitude: 64.94 Azimuth: 359.30

SAAO

Object: Altitude: -20.19 Azimuth: 334.30

Sun: Altitude: -39.85 Azimuth: 26.09

Moon: Altitude: 36.36 Azimuth: 195.86

IAC

Object: Altitude: -81.67 Azimuth: 61.82

Sun: Altitude: -34.79 Azimuth: 92.49

Moon: Altitude: 43.09 Azimuth: 268.86

Argentina

Object: Altitude: -3.75 Azimuth: 48.33

Sun: Altitude: 24.51 Azimuth: 88.48

Moon: Altitude: -21.49 Azimuth: 259.54

Mexico

Object: Altitude: -6.62 Azimuth: 56.49

Sun: Altitude: 37.45 Azimuth: 35.64

Moon: Altitude: -29.00 Azimuth: 218.46

Ural

Object: Altitude: -38.43 Azimuth: 271.05

Sun: Altitude: -44.59 Azimuth: 205.46

Moon: Altitude: 48.25 Azimuth: 37.04

Vostryakovo

Object: Altitude: -50.58 Azimuth: 252.85

Sun: Altitude: -48.37 Azimuth: 175.10

Moon: Altitude: 54.20 Azimuth: 5.61

Gal. latitude: -9.595218 Gal. longitude: 1.865731

Dist. to Sun: 48.174026

Dist. to Moon: 140.370764

Moon coord.: (138.572868 d, 19.674573 d)

Sun coord.: (325.404485 d, -13.833868 d)

Lunar disk: 0.994189

Lunar phase: 8.743877

Lunar bright limb: 310.656076

No SN in this field

2025-02-11 22:28:12 (JD 2460718.436250)

Siderial time 10.460156 h

Ra 18:25:33.49 Dec -31:57:36.20
(276.389542d, -31.960056d)

Rise 2025-02-12 07:39:30

Transit 2025-02-12 09:24:50

Set 2025-02-12 11:10:12

Amur

Object: Altitude: 3.64 Azimuth: 335.15

Sun: Altitude: -3.56 Azimuth: 287.45

Moon: Altitude: 4.24 Azimuth: 115.74

Tunka

Object: Altitude: -6.20 Azimuth: 316.31

Sun: Altitude: -18.89 Azimuth: 268.47

Moon: Altitude: 19.31 Azimuth: 97.25

Kislovodsk

Object: Altitude: -38.39 Azimuth: 280.17

Sun: Altitude: -56.96 Azimuth: 210.11

Moon: Altitude: 59.19 Azimuth: 45.27

Tavrida

Object: Altitude: -44.55 Azimuth: 274.03

Sun: Altitude: -58.38 Azimuth: 194.66

Moon: Altitude: 62.13 Azimuth: 29.65

SAAO

Object: Altitude: -13.56 Azimuth: 322.91

Sun: Altitude: -43.52 Azimuth: 7.17

Moon: Altitude: 38.13 Azimuth: 178.81

IAC

Object: Altitude: -83.38 Azimuth: 305.11

Sun: Altitude: -47.89 Azimuth: 101.02

Moon: Altitude: 55.78 Azimuth: 276.79

Argentina

Object: Altitude: -12.59 Azimuth: 39.04

Sun: Altitude: 11.82 Azimuth: 80.94

Moon: Altitude: -9.43 Azimuth: 252.85

Mexico

Object: Altitude: -17.75 Azimuth: 62.87

Sun: Altitude: 28.73 Azimuth: 49.61

Moon: Altitude: -20.45 Azimuth: 230.22

Ural

Object: Altitude: -30.32 Azimuth: 283.01

Sun: Altitude: -39.91 Azimuth: 224.15

Moon: Altitude: 42.40 Azimuth: 54.68

Vostryakovo

Object: Altitude: -42.18 Azimuth: 266.83

Sun: Altitude: -47.47 Azimuth: 196.86

Moon: Altitude: 51.61 Azimuth: 27.97

Gal. latitude: -9.595218 Gal. longitude: 1.865731

Dist. to Sun: 48.215293

Dist. to Moon: 139.838639

Moon coord.: (139.101445 d, 19.480333 d)

Sun coord.: (325.445479 d, -13.820067 d)

Lunar disk: 0.994786

Lunar phase: 8.281424

Lunar bright limb: 311.938019

No SN in this field

2025-04-30 04:16:08 (JD 2460795.677870)

Siderial time 21.334579 h

Ra 18:25:33.49 Dec -31:57:36.20
(276.389542d, -31.960056d)

Rise 2025-05-01 02:32:44

Transit 2025-04-30 04:22:06

Set 2025-04-30 06:07:26

Amur

Object: Altitude: -51.28 Azimuth: 100.26

Sun: Altitude: 52.99 Azimuth: 20.44

Moon: Altitude: 61.95 Azimuth: 317.02

Tunka

Object: Altitude: -35.98 Azimuth: 82.24

Sun: Altitude: 51.73 Azimuth: 341.28

Moon: Altitude: 48.21 Azimuth: 287.87

Kislovodsk

Object: Altitude: 2.28 Azimuth: 39.51

Sun: Altitude: 22.77 Azimuth: 271.15

Moon: Altitude: 8.03 Azimuth: 239.51

Tavrida

Object: Altitude: 5.11 Azimuth: 33.22

Sun: Altitude: 16.71 Azimuth: 265.62

Moon: Altitude: 3.47 Azimuth: 233.99

SAAO

Object: Altitude: 67.35 Azimuth: 83.81

Sun: Altitude: -11.23 Azimuth: 259.57

Moon: Altitude: -44.92 Azimuth: 262.18

IAC

Object: Altitude: 28.92 Azimuth: 349.83

Sun: Altitude: -26.29 Azimuth: 233.97

Moon: Altitude: -32.55 Azimuth: 195.67

Argentina

Object: Altitude: 37.07 Azimuth: 288.19

Sun: Altitude: -72.50 Azimuth: 13.79

Moon: Altitude: -56.85 Azimuth: 92.26

Mexico

Object: Altitude: -26.97 Azimuth: 292.76

Sun: Altitude: -26.84 Azimuth: 129.60

Moon: Altitude: 5.29 Azimuth: 118.88

Ural

Object: Altitude: -14.66 Azimuth: 52.97

Sun: Altitude: 30.82 Azimuth: 292.06

Moon: Altitude: 23.15 Azimuth: 254.98

Vostryakovo

Object: Altitude: -5.04 Azimuth: 36.14

Sun: Altitude: 19.38 Azimuth: 272.00

Moon: Altitude: 11.46 Azimuth: 237.89

Gal. latitude: -9.595218 Gal. longitude: 1.865731

Dist. to Sun: 123.810832

Dist. to Moon: 157.550722

Moon coord.: (71.039611 d, 27.357480 d)

Sun coord.: (37.326561 d, 14.734382 d)

Lunar disk: 0.084644

Lunar phase: 146.172045

Lunar bright limb: 255.056056

No SN in this field

Recent coverage and limits telegrams

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

  ID = 12050
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) was pointed to the INTEGRAL GRB250211.89 (trigger No 207652,18h 25m 30.79s , -31d 57m 55.1s, R=0.0333) errorbox 12197 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to  17.5 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -36.1 deg. 

MASTER-OAFA robotic telescope  located in Argentina (OAFA observatory of San Juan National University) was pointed to the INTEGRAL GRB250211.89 errorbox 35090 sec after trigger time at 2025-02-12 07:13:01 UT, with upper limit up to  16.5 mag. The observations began at zenith distance = 78 deg. The sun  altitude  is -33.5 deg. 

The galactic latitude b = -10 deg., longitude l =  2 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2775995

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   12287 |         MASTER-SAAO |   C |   180 | 16.1 |        
   12467 |         MASTER-SAAO |   C |   540 | 15.8 |  Coadd 
   13097 |         MASTER-SAAO |   C |  1800 | 16.8 |  Coadd 
   12487 |         MASTER-SAAO |   C |   180 | 16.2 |        
   12686 |         MASTER-SAAO |   C |   180 | 16.4 |        
   12891 |         MASTER-SAAO |   C |   180 | 16.4 |        
   13090 |         MASTER-SAAO |   C |   180 | 16.5 |        
   13289 |         MASTER-SAAO |   C |   180 | 16.6 |        
   13489 |         MASTER-SAAO |   C |   180 | 16.7 |        
   13688 |         MASTER-SAAO |   C |   180 | 16.8 |        
   13887 |         MASTER-SAAO |   C |   180 | 16.8 |        
   14086 |         MASTER-SAAO |   C |   180 | 16.8 |        
   14286 |         MASTER-SAAO |   C |   180 | 16.8 |        
   14466 |         MASTER-SAAO |   C |   540 | 17.1 |  Coadd 
   14485 |         MASTER-SAAO |   C |   180 | 17.0 |        
   14728 |         MASTER-SAAO |   C |   180 | 17.0 |        
   14928 |         MASTER-SAAO |   C |   180 | 17.0 |        
   15108 |         MASTER-SAAO |   C |   540 | 17.2 |  Coadd 
   15127 |         MASTER-SAAO |   C |   180 | 17.0 |        
   15327 |         MASTER-SAAO |   C |   180 | 17.0 |        
   15526 |         MASTER-SAAO |   C |   180 | 17.0 |        
   15586 |         MASTER-SAAO |   C |   300 | 17.1 |  Coadd 
   15665 |         MASTER-SAAO |   C |    60 | 16.9 |        
   15744 |         MASTER-SAAO |   C |    60 | 16.7 |        
   15824 |         MASTER-SAAO |   C |    60 | 16.9 |        
   15884 |         MASTER-SAAO |   C |   180 | 17.2 |  Coadd 
   15903 |         MASTER-SAAO |   C |    60 | 16.9 |        
   15982 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16061 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16121 |         MASTER-SAAO |   C |   180 | 17.2 |  Coadd 
   16141 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16220 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16300 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16360 |         MASTER-SAAO |   C |   180 | 17.2 |  Coadd 
   16379 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16466 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16545 |         MASTER-SAAO |   C |    60 | 16.9 |        
   16605 |         MASTER-SAAO |   C |   180 | 17.0 |  Coadd 
   16624 |         MASTER-SAAO |   C |    60 | 16.7 |        
   16704 |         MASTER-SAAO |   C |    60 | 16.7 |        
   16783 |         MASTER-SAAO |   C |    60 | 16.8 |        
   16843 |         MASTER-SAAO |   C |   180 | 17.3 |  Coadd 
   16883 |         MASTER-SAAO |   C |    60 | 17.0 |        
   16982 |         MASTER-SAAO |   C |    60 | 17.0 |        
   17062 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18074 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18134 |         MASTER-SAAO |   C |   180 | 17.3 |  Coadd 
   18153 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18232 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18312 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18372 |         MASTER-SAAO |   C |   180 | 17.3 |  Coadd 
   18391 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18470 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18549 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18609 |         MASTER-SAAO |   C |   180 | 17.3 |  Coadd 
   18628 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18708 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18787 |         MASTER-SAAO |   C |    60 | 17.0 |        
   18847 |         MASTER-SAAO |   C |   180 | 17.3 |  Coadd 
   18866 |         MASTER-SAAO |   C |    60 | 17.0 |        
   19241 |         MASTER-SAAO |   C |    60 | 17.2 |        
   19350 |         MASTER-SAAO |   C |   120 | 17.4 |        
   19470 |         MASTER-SAAO |   C |   360 | 17.5 |  Coadd 
   19489 |         MASTER-SAAO |   C |   120 | 17.3 |        
   19628 |         MASTER-SAAO |   C |   120 | 17.3 |        
   19767 |         MASTER-SAAO |   C |   120 | 17.3 |        
   19827 |         MASTER-SAAO |   C |   240 | 17.4 |  Coadd 
   19877 |         MASTER-SAAO |   C |    60 | 17.2 |        
   19956 |         MASTER-SAAO |   C |    60 | 17.1 |        
   20040 |         MASTER-SAAO |   C |    60 | 17.1 |        
   20100 |         MASTER-SAAO |   C |   180 | 17.4 |  Coadd 
   20120 |         MASTER-SAAO |   C |    60 | 17.1 |        
   20330 |         MASTER-SAAO |   C |    60 | 17.1 |        
   20439 |         MASTER-SAAO |   C |   120 | 17.1 |        
   20529 |         MASTER-SAAO |   C |   300 | 17.3 |  Coadd 
   20579 |         MASTER-SAAO |   C |   120 | 17.1 |        
   20688 |         MASTER-SAAO |   C |    60 | 16.9 |        
   35180 |         MASTER-OAFA |   C |   180 | 16.2 |        
   35360 |         MASTER-OAFA |   C |   540 | 16.5 |  Coadd 
   35374 |         MASTER-OAFA |   C |   180 | 16.4 |        
   35615 |         MASTER-OAFA |   C |   180 | 16.2 |        
   35801 |         MASTER-OAFA |   C |   180 | 16.4 |        
   35997 |         MASTER-OAFA |   C |   180 | 16.5 |        
   36194 |         MASTER-OAFA |   C |   180 | 16.5 |        
   36450 |         MASTER-OAFA |   C |   180 | 16.5 |        
   37275 |         MASTER-OAFA |   C |   180 | 15.7 |        
   37461 |         MASTER-OAFA |   C |   180 | 15.5 |        
   37647 |         MASTER-OAFA |   C |   180 | 15.3 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12042
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) was pointed to the INTEGRAL GRB250211.89 (trigger No 11044,18h 25m 33.49s , -31d 57m 36.2s, R=0.0533333) errorbox  12195 sec after notice time and 12210 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to  16.7 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -36.1 deg. 

The galactic latitude b = -10 deg., longitude l =  2 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2775663

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   12300 |         MASTER-SAAO |   C |   180 | 16.1 |        
   12480 |         MASTER-SAAO |   C |   540 | 15.8 |  Coadd 
   12500 |         MASTER-SAAO |   C |   180 | 16.2 |        
   12699 |         MASTER-SAAO |   C |   180 | 16.4 |        
   12904 |         MASTER-SAAO |   C |   180 | 16.4 |        
   13103 |         MASTER-SAAO |   C |   180 | 16.5 |        
   13302 |         MASTER-SAAO |   C |   180 | 16.6 |        
   13502 |         MASTER-SAAO |   C |   180 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12041
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) was pointed to the INTEGRAL GRB250211.89 (trigger No 11044,18h 25m 33.49s , -31d 57m 36.2s, R=0.0533333) errorbox  12195 sec after notice time and 12210 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to  16.7 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -36.1 deg. 

The galactic latitude b = -10 deg., longitude l =  2 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2775663

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   12300 |         MASTER-SAAO |   C |   180 | 16.1 |        
   12480 |         MASTER-SAAO |   C |   540 | 15.8 |  Coadd 
   12500 |         MASTER-SAAO |   C |   180 | 16.2 |        
   12699 |         MASTER-SAAO |   C |   180 | 16.4 |        
   12904 |         MASTER-SAAO |   C |   180 | 16.4 |        
   13103 |         MASTER-SAAO |   C |   180 | 16.5 |        
   13302 |         MASTER-SAAO |   C |   180 | 16.6 |        
   13502 |         MASTER-SAAO |   C |   180 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12040
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) was pointed to the INTEGRAL GRB250211.89 (trigger No 11044,18h 25m 33.49s , -31d 57m 36.2s, R=0.0533333) errorbox  12195 sec after notice time and 12210 sec after trigger time at 2025-02-12 00:51:28 UT, with upper limit up to  16.7 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -36.1 deg. 

The galactic latitude b = -10 deg., longitude l =  2 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2775663

We obtain a following upper limits.  

Tmid-T0  |          Site       |Filt.| Expt. | Limit| Comment
_________|_____________________|_____|_______|______|________

   12300 |         MASTER-SAAO |   C |   180 | 16.1 |        
   12480 |         MASTER-SAAO |   C |   540 | 15.8 |  Coadd 
   12500 |         MASTER-SAAO |   C |   180 | 16.2 |        
   12699 |         MASTER-SAAO |   C |   180 | 16.4 |        
   12904 |         MASTER-SAAO |   C |   180 | 16.4 |        
   13103 |         MASTER-SAAO |   C |   180 | 16.5 |        
   13302 |         MASTER-SAAO |   C |   180 | 16.6 |        
   13502 |         MASTER-SAAO |   C |   180 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



 

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