MASTER Net MASTER Database: GRB250327.31 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 SWIFT GRB250327.31
Trignum 1299088
Trigger time 2025-03-27 07:30:04.68
Notice time 2025-03-27 07:32:35.756672
Coord, eb (16h 32m 47.33s , +61d 35m 43.4s) , 0.05
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
2825105 2025-03-27 08:13:17.676237 16h 32m 47.00s +61d 35m 43.0s ANTARES 0.05 1299088
2825096 2025-03-27 07:32:35.756672 16h 32m 47.33s +61d 35m 43.4s SWIFT 0.05 alert 1299088 1 61 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

2025-03-27 07:30:04 (JD 2460761.812546)

Siderial time 22.341516 h

Ra 16:32:47.33 Dec 61:35:43.40
(248.197208d, 61.595389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 21.94 Azimuth: 178.35

Sun: Altitude: 21.31 Azimuth: 66.79

Moon: Altitude: -5.54 Azimuth: 79.89

Tunka

Object: Altitude: 25.52 Azimuth: 165.85

Sun: Altitude: 32.97 Azimuth: 42.51

Moon: Altitude: 8.36 Azimuth: 60.62

Kislovodsk

Object: Altitude: 36.67 Azimuth: 143.64

Sun: Altitude: 42.85 Azimuth: 323.37

Moon: Altitude: 35.54 Azimuth: 0.95

Tavrida

Object: Altitude: 41.17 Azimuth: 141.12

Sun: Altitude: 38.09 Azimuth: 314.07

Moon: Altitude: 34.12 Azimuth: 350.82

SAAO

Object: Altitude: -19.54 Azimuth: 151.66

Sun: Altitude: 32.94 Azimuth: 241.66

Moon: Altitude: 61.00 Azimuth: 226.37

IAC

Object: Altitude: 50.27 Azimuth: 156.22

Sun: Altitude: 5.63 Azimuth: 270.08

Moon: Altitude: 21.54 Azimuth: 296.07

Argentina

Object: Altitude: -4.80 Azimuth: 189.41

Sun: Altitude: -40.77 Azimuth: 297.66

Moon: Altitude: -11.66 Azimuth: 290.57

Mexico

Object: Altitude: 40.60 Azimuth: 213.26

Sun: Altitude: -56.34 Azimuth: 182.02

Moon: Altitude: -57.14 Azimuth: 237.85

Ural

Object: Altitude: 40.87 Azimuth: 143.46

Sun: Altitude: 35.09 Azimuth: 349.05

Moon: Altitude: 20.67 Azimuth: 18.73

Vostryakovo

Object: Altitude: 47.52 Azimuth: 135.30

Sun: Altitude: 31.69 Azimuth: 323.20

Moon: Altitude: 23.82 Azimuth: 355.78

Gal. latitude: 39.887522 Gal. longitude: 92.092944

Dist. to Sun: 100.474889

Dist. to Moon: 99.906190

Moon coord.: (339.242826 d, -10.712718 d)

Sun coord.: (5.996742 d, 2.594820 d)

Lunar disk: 0.066298

Lunar phase: 150.158418

Lunar bright limb: 64.937049

No SN in this field

2025-03-27 07:32:35 (JD 2460761.814294)

Siderial time 22.383576 h

Ra 16:32:47.33 Dec 61:35:43.40
(248.197208d, 61.595389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 21.93 Azimuth: 178.68

Sun: Altitude: 20.94 Azimuth: 67.33

Moon: Altitude: -5.91 Azimuth: 80.35

Tunka

Object: Altitude: 25.42 Azimuth: 166.17

Sun: Altitude: 32.70 Azimuth: 43.19

Moon: Altitude: 8.04 Azimuth: 61.13

Kislovodsk

Object: Altitude: 36.40 Azimuth: 143.81

Sun: Altitude: 43.12 Azimuth: 324.14

Moon: Altitude: 35.54 Azimuth: 1.68

Tavrida

Object: Altitude: 40.89 Azimuth: 141.26

Sun: Altitude: 38.41 Azimuth: 314.76

Moon: Altitude: 34.20 Azimuth: 351.54

SAAO

Object: Altitude: -19.79 Azimuth: 151.49

Sun: Altitude: 33.40 Azimuth: 241.15

Moon: Altitude: 61.36 Azimuth: 225.39

IAC

Object: Altitude: 50.05 Azimuth: 155.92

Sun: Altitude: 6.18 Azimuth: 270.38

Moon: Altitude: 22.03 Azimuth: 296.44

Argentina

Object: Altitude: -4.71 Azimuth: 189.12

Sun: Altitude: -40.29 Azimuth: 297.12

Moon: Altitude: -11.19 Azimuth: 290.20

Mexico

Object: Altitude: 40.90 Azimuth: 213.19

Sun: Altitude: -56.31 Azimuth: 183.16

Moon: Altitude: -56.69 Azimuth: 238.57

Ural

Object: Altitude: 40.67 Azimuth: 143.75

Sun: Altitude: 35.16 Azimuth: 349.81

Moon: Altitude: 20.58 Azimuth: 19.36

Vostryakovo

Object: Altitude: 47.26 Azimuth: 135.54

Sun: Altitude: 31.90 Azimuth: 323.89

Moon: Altitude: 23.86 Azimuth: 356.43

Gal. latitude: 39.887522 Gal. longitude: 92.092944

Dist. to Sun: 100.474951

Dist. to Moon: 99.907103

Moon coord.: (339.265912 d, -10.701254 d)

Sun coord.: (5.998333 d, 2.595505 d)

Lunar disk: 0.066195

Lunar phase: 150.182169

Lunar bright limb: 64.934340

No SN in this field

2025-03-27 08:32:35 (JD 2460761.855961)

Siderial time 23.386313 h

Ra 16:32:47.33 Dec 61:35:43.40
(248.197208d, 61.595389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 22.36 Azimuth: 186.37

Sun: Altitude: 11.78 Azimuth: 79.72

Moon: Altitude: -14.92 Azimuth: 91.59

Tunka

Object: Altitude: 23.80 Azimuth: 173.82

Sun: Altitude: 25.54 Azimuth: 58.29

Moon: Altitude: 0.03 Azimuth: 72.94

Kislovodsk

Object: Altitude: 30.32 Azimuth: 148.29

Sun: Altitude: 47.86 Azimuth: 344.51

Moon: Altitude: 33.93 Azimuth: 18.93

Tavrida

Object: Altitude: 34.49 Azimuth: 145.25

Sun: Altitude: 44.73 Azimuth: 332.99

Moon: Altitude: 34.44 Azimuth: 8.81

SAAO

Object: Altitude: -26.20 Azimuth: 148.08

Sun: Altitude: 43.68 Azimuth: 227.14

Moon: Altitude: 67.40 Azimuth: 195.06

IAC

Object: Altitude: 44.00 Azimuth: 150.32

Sun: Altitude: 19.36 Azimuth: 277.72

Moon: Altitude: 33.09 Azimuth: 306.60

Argentina

Object: Altitude: -3.46 Azimuth: 182.07

Sun: Altitude: -28.44 Azimuth: 285.95

Moon: Altitude: 0.49 Azimuth: 281.99

Mexico

Object: Altitude: 47.72 Azimuth: 210.23

Sun: Altitude: -52.75 Azimuth: 208.41

Moon: Altitude: -45.22 Azimuth: 252.13

Ural

Object: Altitude: 36.25 Azimuth: 150.92

Sun: Altitude: 35.32 Azimuth: 8.19

Moon: Altitude: 17.30 Azimuth: 34.03

Vostryakovo

Object: Altitude: 41.61 Azimuth: 141.65

Sun: Altitude: 35.84 Azimuth: 341.34

Moon: Altitude: 23.53 Azimuth: 11.99

Gal. latitude: 39.887522 Gal. longitude: 92.092944

Dist. to Sun: 100.476406

Dist. to Moon: 99.928297

Moon coord.: (339.816132 d, -10.427273 d)

Sun coord.: (6.036255 d, 2.611827 d)

Lunar disk: 0.063757

Lunar phase: 150.748789

Lunar bright limb: 64.871931

No SN in this field

2025-04-02 06:47:48 (JD 2460767.783194)

Siderial time 22.029402 h

Ra 16:32:47.33 Dec 61:35:43.40
(248.197208d, 61.595389d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: 22.09 Azimuth: 175.96

Sun: Altitude: 28.97 Azimuth: 59.07

Moon: Altitude: 65.73 Azimuth: 353.88

Tunka

Object: Altitude: 26.28 Azimuth: 163.53

Sun: Altitude: 38.91 Azimuth: 32.01

Moon: Altitude: 57.13 Azimuth: 310.85

Kislovodsk

Object: Altitude: 38.71 Azimuth: 142.50

Sun: Altitude: 39.86 Azimuth: 310.14

Moon: Altitude: 19.27 Azimuth: 251.85

Tavrida

Object: Altitude: 43.28 Azimuth: 140.16

Sun: Altitude: 34.35 Azimuth: 302.08

Moon: Altitude: 13.91 Azimuth: 246.83

SAAO

Object: Altitude: -17.70 Azimuth: 152.99

Sun: Altitude: 23.73 Azimuth: 247.07

Moon: Altitude: -29.25 Azimuth: 255.95

IAC

Object: Altitude: 51.85 Azimuth: 158.72

Sun: Altitude: -2.16 Azimuth: 263.24

Moon: Altitude: -26.90 Azimuth: 213.46

Argentina

Object: Altitude: -5.52 Azimuth: 191.52

Sun: Altitude: -49.71 Azimuth: 305.13

Moon: Altitude: -71.97 Azimuth: 76.71

Mexico

Object: Altitude: 38.39 Azimuth: 213.60

Sun: Altitude: -53.02 Azimuth: 164.99

Moon: Altitude: -8.60 Azimuth: 127.67

Ural

Object: Altitude: 42.43 Azimuth: 141.33

Sun: Altitude: 35.75 Azimuth: 336.35

Moon: Altitude: 32.06 Azimuth: 270.59

Vostryakovo

Object: Altitude: 49.42 Azimuth: 133.54

Sun: Altitude: 29.93 Azimuth: 311.30

Moon: Altitude: 19.91 Azimuth: 252.53

Gal. latitude: 39.887522 Gal. longitude: 92.092944

Dist. to Sun: 100.627196

Dist. to Moon: 92.164698

Moon coord.: (63.106118 d, 26.143316 d)

Sun coord.: (11.435031 d, 4.914752 d)

Lunar disk: 0.204570

Lunar phase: 126.218003

Lunar bright limb: 255.968325

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12302
TYPE = 35
DAYS = 1


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250327A ( T. M. Parsotan et al., GCN 39877) errorbox  22478 sec after notice time and 22599 sec after trigger time at 2025-03-27 13:46:44 UT, with upper limit up to  21.2 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -20.9 deg. 

MASTER-Kislovodsk robotic telescope  located in Russia (Lomonosov MSU, Kislovodsk Solar Station of Pulkovo observatory) was pointed to the SWIFT GRB 250327A errorbox  65339 sec after notice time and 65460 sec after trigger time at 2025-03-28 01:41:05 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 19 deg. The sun  altitude  is -15.0 deg. 

The galactic latitude b = 40 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2825081

We obtain a following upper limits.  

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

   22690 |        MASTER-Tunka |   C |   180 | 19.1 |        
   24414 |        MASTER-Tunka |   C |   180 | 19.7 |        
   24608 |        MASTER-Tunka |   C |   180 | 19.7 |        
   24802 |        MASTER-Tunka |   C |   180 | 19.8 |        
   24994 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25190 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25386 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25520 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25940 |        MASTER-Tunka |   C |   900 | 21.0 |  Coadd 
   25593 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25668 |        MASTER-Tunka |   C |    60 | 20.0 |        
   25728 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   25742 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25815 |        MASTER-Tunka |   C |    60 | 20.0 |        
   25889 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25949 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   25963 |        MASTER-Tunka |   C |    60 | 20.0 |        
   26037 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26111 |        MASTER-Tunka |   C |    60 | 20.0 |        
   26171 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   26185 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26257 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26362 |        MASTER-Tunka |   C |   120 | 20.0 |        
   26512 |        MASTER-Tunka |   C |   420 | 20.4 |  Coadd 
   26497 |        MASTER-Tunka |   C |   120 | 20.1 |        
   26660 |        MASTER-Tunka |   C |   180 | 19.9 |        
   26820 |        MASTER-Tunka |   C |   120 | 20.0 |        
   26940 |        MASTER-Tunka |   C |   360 | 20.4 |  Coadd 
   26955 |        MASTER-Tunka |   C |   120 | 20.1 |        
   27088 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27231 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27351 |        MASTER-Tunka |   C |   360 | 20.4 |  Coadd 
   27364 |        MASTER-Tunka |   C |   120 | 20.1 |        
   27498 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27629 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27779 |        MASTER-Tunka |   C |   420 | 20.4 |  Coadd 
   27761 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27927 |        MASTER-Tunka |   C |   180 | 20.0 |        
   28091 |        MASTER-Tunka |   C |   120 | 20.1 |        
   28181 |        MASTER-Tunka |   C |   300 | 20.4 |  Coadd 
   28451 |        MASTER-Tunka |   C |   840 | 21.3 |  Coadd 
   28226 |        MASTER-Tunka |   C |   120 | 20.1 |        
   28328 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28400 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28460 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   28471 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28545 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28620 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28680 |        MASTER-Tunka |   C |   180 | 20.5 |  Coadd 
   28693 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28768 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28845 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28905 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   28919 |        MASTER-Tunka |   C |    60 | 20.1 |        
   28992 |        MASTER-Tunka |   C |    60 | 20.1 |        
   29125 |        MASTER-Tunka |   C |   180 | 20.1 |        
   29258 |        MASTER-Tunka |   C |    60 | 20.0 |        
   65551 |   MASTER-Kislovodsk |   C |   180 | 18.4 |        
   65871 |   MASTER-Kislovodsk |   C |    60 | 17.9 |        
   65951 |   MASTER-Kislovodsk |   C |    60 | 17.7 |        
   66190 |   MASTER-Kislovodsk |   C |    60 | 17.9 |        
   66590 |   MASTER-Kislovodsk |   C |    60 | 17.5 |        
   66813 |   MASTER-Kislovodsk |   C |   180 | 17.8 |        
   67032 |   MASTER-Kislovodsk |   C |    60 | 17.4 |        
   67351 |   MASTER-Kislovodsk |   C |    60 | 16.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12301
TYPE = 35
DAYS = 0.5


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250327A ( T. M. Parsotan et al., GCN 39877) errorbox  22478 sec after notice time and 22599 sec after trigger time at 2025-03-27 13:46:44 UT, with upper limit up to  21.2 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -20.9 deg. 

The galactic latitude b = 40 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2825081

We obtain a following upper limits.  

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

   22690 |        MASTER-Tunka |   C |   180 | 19.1 |        
   24414 |        MASTER-Tunka |   C |   180 | 19.7 |        
   24608 |        MASTER-Tunka |   C |   180 | 19.7 |        
   24802 |        MASTER-Tunka |   C |   180 | 19.8 |        
   24994 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25190 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25386 |        MASTER-Tunka |   C |   180 | 19.8 |        
   25520 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25940 |        MASTER-Tunka |   C |   900 | 21.0 |  Coadd 
   25593 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25668 |        MASTER-Tunka |   C |    60 | 20.0 |        
   25728 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   25742 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25815 |        MASTER-Tunka |   C |    60 | 20.0 |        
   25889 |        MASTER-Tunka |   C |    60 | 19.9 |        
   25949 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   25963 |        MASTER-Tunka |   C |    60 | 20.0 |        
   26037 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26111 |        MASTER-Tunka |   C |    60 | 20.0 |        
   26171 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   26185 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26257 |        MASTER-Tunka |   C |    60 | 19.9 |        
   26362 |        MASTER-Tunka |   C |   120 | 20.0 |        
   26512 |        MASTER-Tunka |   C |   420 | 20.4 |  Coadd 
   26497 |        MASTER-Tunka |   C |   120 | 20.1 |        
   26660 |        MASTER-Tunka |   C |   180 | 19.9 |        
   26820 |        MASTER-Tunka |   C |   120 | 20.0 |        
   26940 |        MASTER-Tunka |   C |   360 | 20.4 |  Coadd 
   26955 |        MASTER-Tunka |   C |   120 | 20.1 |        
   27088 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27231 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27351 |        MASTER-Tunka |   C |   360 | 20.4 |  Coadd 
   27364 |        MASTER-Tunka |   C |   120 | 20.1 |        
   27498 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27629 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27779 |        MASTER-Tunka |   C |   420 | 20.4 |  Coadd 
   27761 |        MASTER-Tunka |   C |   120 | 20.0 |        
   27927 |        MASTER-Tunka |   C |   180 | 20.0 |        
   28091 |        MASTER-Tunka |   C |   120 | 20.1 |        
   28181 |        MASTER-Tunka |   C |   300 | 20.4 |  Coadd 
   28451 |        MASTER-Tunka |   C |   840 | 21.3 |  Coadd 
   28226 |        MASTER-Tunka |   C |   120 | 20.1 |        
   28328 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28400 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28460 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   28471 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28545 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28620 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28680 |        MASTER-Tunka |   C |   180 | 20.5 |  Coadd 
   28693 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28768 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28845 |        MASTER-Tunka |   C |    60 | 20.0 |        
   28905 |        MASTER-Tunka |   C |   180 | 20.4 |  Coadd 
   28919 |        MASTER-Tunka |   C |    60 | 20.1 |        
   28992 |        MASTER-Tunka |   C |    60 | 20.1 |        
   29125 |        MASTER-Tunka |   C |   180 | 20.1 |        
   29258 |        MASTER-Tunka |   C |    60 | 20.0 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12296
TYPE = 35
DAYS = 0


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250327A ( T. M. Parsotan et al., GCN 39877) errorbox  22478 sec after notice time and 22599 sec after trigger time at 2025-03-27 13:46:44 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -20.9 deg. 

The galactic latitude b = 40 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2825096

We obtain a following upper limits.  

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

   22690 |        MASTER-Tunka |   C |   180 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12295
TYPE = 35
DAYS = 0


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250327A ( T. M. Parsotan et al., GCN 39877) errorbox  22478 sec after notice time and 22599 sec after trigger time at 2025-03-27 13:46:44 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -20.9 deg. 

The galactic latitude b = 40 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2825096

We obtain a following upper limits.  

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

   22690 |        MASTER-Tunka |   C |   180 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12294
TYPE = 34
DAYS = 0


MASTER-Tunka robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in Russia (Applied Physics Institute, Irkutsk State University) was pointed to the SWIFT GRB 250327A ( T. M. Parsotan et al., GCN 39877) errorbox  22478 sec after notice time and 22599 sec after trigger time at 2025-03-27 13:46:44 UT, with upper limit up to  19.1 mag. The observations began at zenith distance = 56 deg. The sun  altitude  is -20.9 deg. 

The galactic latitude b = 40 deg., longitude l = 92 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2825096

We obtain a following upper limits.  

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

   22690 |        MASTER-Tunka |   C |   180 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025