GRB250309.03 page :: MASTER Database

MASTER Net MASTER Database: GRB250309.03 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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Name

FERMI GRB250309.03

Trignum

763173728

Trigger time

2025-03-09 00:42:03.79

Notice time

2025-03-09 00:42:44.437747

Coord, eb

(02h 48m 43.92s , +60d 46m 58.8s) , 30.17

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You are viewing outdated information, relevant error box is here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
2805320	2025-03-09 00:51:40.873007	03^h 06^m 38.40^s +58^d 01^m 12.0^s	FERMI	22.86	alert	763173728	23	115	alert
2805304	2025-03-09 00:42:44.437747	02^h 48^m 43.92^s +60^d 46^m 58.8^s	FERMI	30.17	alert	763173728	258	111	alert

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

Synchronous WFC images

Distance	datetime	coord2000	observatory	camera	links
106.9	2025-03-09 00:41:59.124	07^h 12^m 32.82^s -31^d 48^m 08.1^s	OAFA	29008	Database OAFA

Errorbox center visibility at MASTER facilities

trigger

notice

notice+1hr

now

2025-03-09 00:42:03 (JD 2460743.529201)

Siderial time 14.339843 h

Ra 02:48:43.92 Dec 60:46:58.80
( 42.183000d, 60.783000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 39.24 Azimuth: 218.70

Sun: Altitude: 23.17 Azimuth: 310.75

Moon: Altitude: -11.31 Azimuth: 193.79

Tunka

Object: Altitude: 31.85 Azimuth: 209.29

Sun: Altitude: 9.22 Azimuth: 289.76

Moon: Altitude: -10.58 Azimuth: 171.70

Kislovodsk

Object: Altitude: 14.54 Azimuth: 178.90

Sun: Altitude: -30.76 Azimuth: 243.88

Moon: Altitude: 5.36 Azimuth: 123.07

Tavrida

Object: Altitude: 15.87 Azimuth: 174.60

Sun: Altitude: -35.53 Azimuth: 235.37

Moon: Altitude: 11.12 Azimuth: 117.45

SAAO

Object: Altitude: -57.60 Azimuth: 158.35

Sun: Altitude: -43.88 Azimuth: 317.89

Moon: Altitude: -13.06 Azimuth: 114.11

IAC

Object: Altitude: 11.94 Azimuth: 154.07

Sun: Altitude: -65.03 Azimuth: 160.03

Moon: Altitude: 44.99 Azimuth: 101.29

Argentina

Object: Altitude: -16.92 Azimuth: 152.23

Sun: Altitude: -21.51 Azimuth: 69.76

Moon: Altitude: 30.98 Azimuth: 181.64

Mexico

Object: Altitude: 56.04 Azimuth: 158.40

Sun: Altitude: 7.98 Azimuth: 79.68

Moon: Altitude: 52.78 Azimuth: 264.87

Ural

Object: Altitude: 28.39 Azimuth: 188.17

Sun: Altitude: -15.84 Azimuth: 253.51

Moon: Altitude: 5.18 Azimuth: 134.72

Vostryakovo

Object: Altitude: 26.29 Azimuth: 176.25

Sun: Altitude: -27.35 Azimuth: 233.84

Moon: Altitude: 13.92 Azimuth: 118.02

Gal. latitude: 1.495515 Gal. longitude: 137.101939

Dist. to Sun: 77.093757

Dist. to Moon: 55.616312

Moon coord.: (109.730059 d, 27.198210 d)

Sun coord.: (349.285371 d, -4.609783 d)

Lunar disk: 0.743943

Lunar phase: 60.798206

Lunar bright limb: 280.505472

No SN in this field

2025-03-09 00:42:44 (JD 2460743.529676)

Siderial time 14.351263 h

Ra 02:48:43.92 Dec 60:46:58.80
( 42.183000d, 60.783000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 39.30 Azimuth: 218.76

Sun: Altitude: 23.25 Azimuth: 310.91

Moon: Altitude: -11.29 Azimuth: 193.93

Tunka

Object: Altitude: 31.90 Azimuth: 209.37

Sun: Altitude: 9.32 Azimuth: 289.90

Moon: Altitude: -10.60 Azimuth: 171.84

Kislovodsk

Object: Altitude: 14.54 Azimuth: 178.99

Sun: Altitude: -30.65 Azimuth: 244.03

Moon: Altitude: 5.26 Azimuth: 123.18

Tavrida

Object: Altitude: 15.86 Azimuth: 174.69

Sun: Altitude: -35.42 Azimuth: 235.54

Moon: Altitude: 11.01 Azimuth: 117.56

SAAO

Object: Altitude: -57.65 Azimuth: 158.47

Sun: Altitude: -43.78 Azimuth: 317.70

Moon: Altitude: -13.18 Azimuth: 114.04

IAC

Object: Altitude: 11.87 Azimuth: 154.12

Sun: Altitude: -65.08 Azimuth: 160.42

Moon: Altitude: 44.85 Azimuth: 101.34

Argentina

Object: Altitude: -16.99 Azimuth: 152.18

Sun: Altitude: -21.64 Azimuth: 69.65

Moon: Altitude: 30.99 Azimuth: 181.47

Mexico

Object: Altitude: 55.99 Azimuth: 158.29

Sun: Altitude: 7.84 Azimuth: 79.77

Moon: Altitude: 52.92 Azimuth: 264.94

Ural

Object: Altitude: 28.41 Azimuth: 188.26

Sun: Altitude: -15.75 Azimuth: 253.66

Moon: Altitude: 5.12 Azimuth: 134.86

Vostryakovo

Object: Altitude: 26.29 Azimuth: 176.35

Sun: Altitude: -27.28 Azimuth: 234.01

Moon: Altitude: 13.84 Azimuth: 118.15

Gal. latitude: 1.495515 Gal. longitude: 137.101939

Dist. to Sun: 77.093412

Dist. to Moon: 55.620532

Moon coord.: (109.736954 d, 27.197174 d)

Sun coord.: (349.285809 d, -4.609597 d)

Lunar disk: 0.743987

Lunar phase: 60.792464

Lunar bright limb: 280.508626

No SN in this field

2025-03-09 01:42:44 (JD 2460743.571343)

Siderial time 15.354001 h

Ra 02:48:43.92 Dec 60:46:58.80
( 42.183000d, 60.783000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 45.65 Azimuth: 223.74

Sun: Altitude: 29.62 Azimuth: 326.05

Moon: Altitude: -8.19 Azimuth: 206.58

Tunka

Object: Altitude: 36.92 Azimuth: 215.85

Sun: Altitude: 17.64 Azimuth: 302.70

Moon: Altitude: -10.94 Azimuth: 184.91

Kislovodsk

Object: Altitude: 15.07 Azimuth: 186.55

Sun: Altitude: -20.46 Azimuth: 256.19

Moon: Altitude: -3.02 Azimuth: 133.00

Tavrida

Object: Altitude: 15.58 Azimuth: 182.29

Sun: Altitude: -25.98 Azimuth: 249.06

Moon: Altitude: 2.28 Azimuth: 127.04

SAAO

Object: Altitude: -61.03 Azimuth: 171.25

Sun: Altitude: -34.11 Azimuth: 302.96

Moon: Altitude: -24.53 Azimuth: 107.68

IAC

Object: Altitude: 6.62 Azimuth: 159.30

Sun: Altitude: -65.41 Azimuth: 196.62

Moon: Altitude: 32.47 Azimuth: 105.71

Argentina

Object: Altitude: -23.35 Azimuth: 148.31

Sun: Altitude: -33.14 Azimuth: 58.84

Moon: Altitude: 29.80 Azimuth: 166.63

Mexico

Object: Altitude: 50.35 Azimuth: 150.46

Sun: Altitude: -4.92 Azimuth: 87.59

Moon: Altitude: 65.25 Azimuth: 272.05

Ural

Object: Altitude: 30.16 Azimuth: 196.42

Sun: Altitude: -7.71 Azimuth: 266.55

Moon: Altitude: 0.07 Azimuth: 146.68

Vostryakovo

Object: Altitude: 26.35 Azimuth: 184.52

Sun: Altitude: -19.81 Azimuth: 248.16

Moon: Altitude: 6.94 Azimuth: 129.16

Gal. latitude: 1.495515 Gal. longitude: 137.101939

Dist. to Sun: 77.063173

Dist. to Moon: 55.991916

Moon coord.: (110.341676 d, 27.104904 d)

Sun coord.: (349.324270 d, -4.593312 d)

Lunar disk: 0.747816

Lunar phase: 60.288573

Lunar bright limb: 280.784794

No SN in this field

2025-06-16 21:26:54 (JD 2460843.393681)

Siderial time 17.649421 h

Ra 02:48:43.92 Dec 60:46:58.80
( 42.183000d, 60.783000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 61.88 Azimuth: 229.86

Sun: Altitude: 17.40 Azimuth: 254.13

Moon: Altitude: 24.58 Azimuth: 22.05

Tunka

Object: Altitude: 51.19 Azimuth: 227.79

Sun: Altitude: 4.11 Azimuth: 236.49

Moon: Altitude: 25.50 Azimuth: 355.74

Kislovodsk

Object: Altitude: 21.41 Azimuth: 202.73

Sun: Altitude: -22.76 Azimuth: 184.40

Moon: Altitude: 8.79 Azimuth: 296.97

Tavrida

Object: Altitude: 20.16 Azimuth: 199.08

Sun: Altitude: -21.79 Azimuth: 175.96

Moon: Altitude: 2.82 Azimuth: 290.87

SAAO

Object: Altitude: -57.00 Azimuth: 202.92

Sun: Altitude: -72.29 Azimuth: 63.80

Moon: Altitude: 9.87 Azimuth: 278.73

IAC

Object: Altitude: -0.42 Azimuth: 174.38

Sun: Altitude: -16.25 Azimuth: 128.78

Moon: Altitude: -35.30 Azimuth: 265.54

Argentina

Object: Altitude: -39.74 Azimuth: 145.08

Sun: Altitude: 1.41 Azimuth: 118.83

Moon: Altitude: -45.46 Azimuth: 354.90

Mexico

Object: Altitude: 34.16 Azimuth: 145.35

Sun: Altitude: 61.06 Azimuth: 82.43

Moon: Altitude: -50.96 Azimuth: 109.77

Ural

Object: Altitude: 38.16 Azimuth: 214.07

Sun: Altitude: -7.59 Azimuth: 199.78

Moon: Altitude: 10.13 Azimuth: 313.07

Vostryakovo

Object: Altitude: 30.97 Azimuth: 202.73

Sun: Altitude: -11.24 Azimuth: 179.72

Moon: Altitude: 1.00 Azimuth: 294.15

Gal. latitude: 1.495515 Gal. longitude: 137.101939

Dist. to Sun: 47.646101

Dist. to Moon: 90.706427

Moon coord.: (334.132297 d, -12.599779 d)

Sun coord.: (85.229640 d, 23.374659 d)

Lunar disk: 0.705560

Lunar phase: 65.724782

Lunar bright limb: 69.768532

No SN in this field

Recent coverage and limits telegrams

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

  ID = 12212
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 250309A ( Fermi GBM team, GCN 39623) errorbox  71845 sec after notice time and 71879 sec after trigger time at 2025-03-09 20:40:03 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -50.2 deg. 

The galactic latitude b =  0 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2805320

We obtain a following upper limits.  

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

   71900 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.83s , +38d 43m 03.4s) |   C |    40 | 15.5 |        
   71955 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.84s , +38d 43m 03.3s) |   C |   150 | 16.2 |  Coadd 
   71965 | 2025-03-09 20:41:03 |   MASTER-Kislovodsk | (02h 47m 28.70s , +38d 42m 52.8s) |   C |    50 | 15.4 |        
   72040 | 2025-03-09 20:42:13 |   MASTER-Kislovodsk | (02h 47m 28.63s , +38d 42m 43.8s) |   C |    60 | 15.6 |        
   72130 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.55s , +38d 42m 35.0s) |   C |    80 | 15.7 |        
   72240 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.54s , +38d 42m 34.9s) |   C |   300 | 16.1 |  Coadd 
   72240 | 2025-03-09 20:45:13 |   MASTER-Kislovodsk | (02h 47m 28.42s , +38d 42m 25.5s) |   C |   100 | 15.8 |        
   72370 | 2025-03-09 20:47:13 |   MASTER-Kislovodsk | (02h 47m 28.29s , +38d 42m 16.6s) |   C |   120 | 15.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12209
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 250309A ( Fermi GBM team, GCN 39623) errorbox  71845 sec after notice time and 71879 sec after trigger time at 2025-03-09 20:40:03 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -50.2 deg. 

The galactic latitude b =  0 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2805320

We obtain a following upper limits.  

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

   71900 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.83s , +38d 43m 03.4s) |   C |    40 | 15.5 |        
   71955 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.84s , +38d 43m 03.3s) |   C |   150 | 16.2 |  Coadd 
   71965 | 2025-03-09 20:41:03 |   MASTER-Kislovodsk | (02h 47m 28.70s , +38d 42m 52.8s) |   C |    50 | 15.4 |        
   72040 | 2025-03-09 20:42:13 |   MASTER-Kislovodsk | (02h 47m 28.63s , +38d 42m 43.8s) |   C |    60 | 15.6 |        
   72130 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.55s , +38d 42m 35.0s) |   C |    80 | 15.7 |        
   72240 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.54s , +38d 42m 34.9s) |   C |   300 | 16.1 |  Coadd 
   72240 | 2025-03-09 20:45:13 |   MASTER-Kislovodsk | (02h 47m 28.42s , +38d 42m 25.5s) |   C |   100 | 15.8 |        
   72370 | 2025-03-09 20:47:13 |   MASTER-Kislovodsk | (02h 47m 28.29s , +38d 42m 16.6s) |   C |   120 | 15.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12205
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 250309A ( Fermi GBM team, GCN 39623) errorbox  71845 sec after notice time and 71879 sec after trigger time at 2025-03-09 20:40:03 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -50.2 deg. 

The galactic latitude b =  0 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2805313

We obtain a following upper limits.  

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

   71900 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.83s , +38d 43m 03.4s) |   C |    40 | 15.5 |        
   71955 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.84s , +38d 43m 03.3s) |   C |   150 | 16.2 |  Coadd 
   71965 | 2025-03-09 20:41:03 |   MASTER-Kislovodsk | (02h 47m 28.70s , +38d 42m 52.8s) |   C |    50 | 15.4 |        
   72040 | 2025-03-09 20:42:13 |   MASTER-Kislovodsk | (02h 47m 28.63s , +38d 42m 43.8s) |   C |    60 | 15.6 |        
   72130 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.55s , +38d 42m 35.0s) |   C |    80 | 15.7 |        
   72240 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.54s , +38d 42m 34.9s) |   C |   300 | 16.1 |  Coadd 
   72240 | 2025-03-09 20:45:13 |   MASTER-Kislovodsk | (02h 47m 28.42s , +38d 42m 25.5s) |   C |   100 | 15.8 |        
   72370 | 2025-03-09 20:47:13 |   MASTER-Kislovodsk | (02h 47m 28.29s , +38d 42m 16.6s) |   C |   120 | 15.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12204
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 250309A ( Fermi GBM team, GCN 39623) errorbox  71845 sec after notice time and 71879 sec after trigger time at 2025-03-09 20:40:03 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -50.2 deg. 

The galactic latitude b =  0 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2805313

We obtain a following upper limits.  

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

   71900 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.83s , +38d 43m 03.4s) |   C |    40 | 15.5 |        
   71955 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.84s , +38d 43m 03.3s) |   C |   150 | 16.2 |  Coadd 
   71965 | 2025-03-09 20:41:03 |   MASTER-Kislovodsk | (02h 47m 28.70s , +38d 42m 52.8s) |   C |    50 | 15.4 |        
   72040 | 2025-03-09 20:42:13 |   MASTER-Kislovodsk | (02h 47m 28.63s , +38d 42m 43.8s) |   C |    60 | 15.6 |        
   72130 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.55s , +38d 42m 35.0s) |   C |    80 | 15.7 |        
   72240 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.54s , +38d 42m 34.9s) |   C |   300 | 16.1 |  Coadd 
   72240 | 2025-03-09 20:45:13 |   MASTER-Kislovodsk | (02h 47m 28.42s , +38d 42m 25.5s) |   C |   100 | 15.8 |        
   72370 | 2025-03-09 20:47:13 |   MASTER-Kislovodsk | (02h 47m 28.29s , +38d 42m 16.6s) |   C |   120 | 15.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12203
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 250309A ( Fermi GBM team, GCN 39623) errorbox  71845 sec after notice time and 71879 sec after trigger time at 2025-03-09 20:40:03 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 81 deg. The sun  altitude  is -50.2 deg. 

The galactic latitude b =  0 deg., longitude l = 140 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2805313

We obtain a following upper limits.  

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

   71900 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.83s , +38d 43m 03.4s) |   C |    40 | 15.5 |        
   71955 | 2025-03-09 20:40:03 |   MASTER-Kislovodsk | (02h 47m 28.84s , +38d 43m 03.3s) |   C |   150 | 16.2 |  Coadd 
   71965 | 2025-03-09 20:41:03 |   MASTER-Kislovodsk | (02h 47m 28.70s , +38d 42m 52.8s) |   C |    50 | 15.4 |        
   72040 | 2025-03-09 20:42:13 |   MASTER-Kislovodsk | (02h 47m 28.63s , +38d 42m 43.8s) |   C |    60 | 15.6 |        
   72130 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.55s , +38d 42m 35.0s) |   C |    80 | 15.7 |        
   72240 | 2025-03-09 20:43:33 |   MASTER-Kislovodsk | (02h 47m 28.54s , +38d 42m 34.9s) |   C |   300 | 16.1 |  Coadd 
   72240 | 2025-03-09 20:45:13 |   MASTER-Kislovodsk | (02h 47m 28.42s , +38d 42m 25.5s) |   C |   100 | 15.8 |        
   72370 | 2025-03-09 20:47:13 |   MASTER-Kislovodsk | (02h 47m 28.29s , +38d 42m 16.6s) |   C |   120 | 15.7 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025

MASTER Net MASTER Database: GRB250309.03 page

MASTER WFC: Raw | Processing | Search Single sets | Single images SN | Asteroid | Transient | Comet

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Search: proc_data raw_data stars sn lc Moving objects Transients Trans_alert(SWIFT) Short Two tube Tr. difference SN CND Asteroids wide_field Diff Transients + Vis. Gal. Transients + All Gal. GCN Transients.

Amur

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Amur

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Kislovodsk

Tavrida

SAAO

IAC

Argentina

Mexico

Ural

Vostryakovo

Amur

Tunka

Kislovodsk

Tavrida

SAAO

IAC

Argentina

Mexico

Ural

Vostryakovo

Amur

Tunka

Kislovodsk

Tavrida

SAAO

IAC

Argentina

Mexico

Ural

Vostryakovo

MASTER WFC:
Raw | Processing | Search
Single sets | Single images
SN | Asteroid | Transient | Comet

MASTER II:
Raw | Processing | Search by orbit elements | Search
SN | Asteroid | Transient | Two tube | Short transient | Tr. difference | Comet | Nova M31 | GRB | GRB_HPX | LIGO
Manual control | Planner | Planner Results | Planner NET

General:
SN list | Sky map | Add asteroid
Meteo | Focus | MASTER page
Users list | Users statistic | Logout

Search: