MASTER Net MASTER Database: GRB250509.94 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 GRB250509.94
Trignum 768522814
Trigger time 2025-05-09 22:33:29.29
Notice time 2025-05-09 22:43:05.231414
Coord, eb (03h 03m 50.40s , -35d 20m 24.0s) , 3.04
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
2866537 2025-05-09 22:43:07.863625 03h 03m 50.40s -35d 20m 24.0s FERMI 3.04 alert 768522814 2 115 alert
2866526 2025-05-09 22:39:21.063247 03h 08m 33.60s -35d 20m 24.0s FERMI 3.58 alert 768522814 5 112 alert
2866503 2025-05-09 22:36:36.383651 02h 58m 19.99s -37d 18m 00.0s FERMI 10.0667 alert 768522814 18 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
72.6 2025-05-09 22:31:14.485 09h 05m 53.12s -31d 48m 08.1s OAFA 29008 Database OAFA
55.5 2025-05-09 22:31:56.507 00h 00m 00.00s +00d 00m 00.0s OAFA 111342 Database OAFA
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2025-05-09 22:33:29 (JD 2460805.439919)

Siderial time 16.265208 h

Ra 03:03:50.40 Dec -35:20:24.00
( 45.960000d, -35.340000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -16.57 Azimuth: 305.91

Sun: Altitude: 24.26 Azimuth: 271.48

Moon: Altitude: -35.85 Azimuth: 123.86

Tunka

Object: Altitude: -30.80 Azimuth: 289.35

Sun: Altitude: 9.31 Azimuth: 253.42

Moon: Altitude: -21.21 Azimuth: 102.22

Kislovodsk

Object: Altitude: -70.51 Azimuth: 252.26

Sun: Altitude: -25.45 Azimuth: 203.46

Moon: Altitude: 19.04 Azimuth: 55.38

Tavrida

Object: Altitude: -75.55 Azimuth: 234.46

Sun: Altitude: -26.51 Azimuth: 194.56

Moon: Altitude: 23.20 Azimuth: 47.67

SAAO

Object: Altitude: -22.27 Azimuth: 358.93

Sun: Altitude: -75.14 Azimuth: 358.38

Moon: Altitude: 53.74 Azimuth: 122.64

IAC

Object: Altitude: -58.70 Azimuth: 67.73

Sun: Altitude: -31.92 Azimuth: 137.60

Moon: Altitude: 51.75 Azimuth: 348.79

Argentina

Object: Altitude: 16.97 Azimuth: 58.51

Sun: Altitude: -9.38 Azimuth: 104.88

Moon: Altitude: 30.47 Azimuth: 261.77

Mexico

Object: Altitude: 8.67 Azimuth: 39.22

Sun: Altitude: 43.53 Azimuth: 85.01

Moon: Altitude: -14.08 Azimuth: 272.54

Ural

Object: Altitude: -55.65 Azimuth: 248.15

Sun: Altitude: -8.60 Azimuth: 217.52

Moon: Altitude: 3.20 Azimuth: 67.36

Vostryakovo

Object: Altitude: -66.38 Azimuth: 219.51

Sun: Altitude: -15.60 Azimuth: 197.26

Moon: Altitude: 14.26 Azimuth: 48.45

Gal. latitude: -60.301067 Gal. longitude: 236.967380

Dist. to Sun: 52.873166

Dist. to Moon: 127.541047

Moon coord.: (196.853144 d, -9.345449 d)

Sun coord.: (46.735280 d, 17.528048 d)

Lunar disk: 0.932744

Lunar phase: 30.061636

Lunar bright limb: 288.941006

No SN in this field

2025-05-09 22:43:05 (JD 2460805.446586)

Siderial time 16.425646 h

Ra 03:03:50.40 Dec -35:20:24.00
( 45.960000d, -35.340000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -15.34 Azimuth: 307.50

Sun: Altitude: 25.79 Azimuth: 273.36

Moon: Altitude: -37.10 Azimuth: 126.27

Tunka

Object: Altitude: -29.40 Azimuth: 290.95

Sun: Altitude: 10.74 Azimuth: 255.24

Moon: Altitude: -22.65 Azimuth: 104.16

Kislovodsk

Object: Altitude: -68.84 Azimuth: 255.24

Sun: Altitude: -24.73 Azimuth: 205.86

Moon: Altitude: 17.61 Azimuth: 57.28

Tavrida

Object: Altitude: -74.11 Azimuth: 239.59

Sun: Altitude: -26.05 Azimuth: 197.05

Moon: Altitude: 21.93 Azimuth: 49.75

SAAO

Object: Altitude: -22.19 Azimuth: 356.81

Sun: Altitude: -74.93 Azimuth: 349.55

Moon: Altitude: 52.08 Azimuth: 119.99

IAC

Object: Altitude: -60.66 Azimuth: 67.49

Sun: Altitude: -33.32 Azimuth: 139.75

Moon: Altitude: 52.05 Azimuth: 352.50

Argentina

Object: Altitude: 15.23 Azimuth: 57.55

Sun: Altitude: -11.35 Azimuth: 103.71

Moon: Altitude: 32.45 Azimuth: 260.38

Mexico

Object: Altitude: 7.34 Azimuth: 40.68

Sun: Altitude: 41.48 Azimuth: 86.39

Moon: Altitude: -12.10 Azimuth: 273.76

Ural

Object: Altitude: -54.42 Azimuth: 250.82

Sun: Altitude: -7.79 Azimuth: 219.68

Moon: Altitude: 1.98 Azimuth: 69.32

Vostryakovo

Object: Altitude: -65.47 Azimuth: 223.78

Sun: Altitude: -15.17 Azimuth: 199.59

Moon: Altitude: 13.22 Azimuth: 50.57

Gal. latitude: -60.301067 Gal. longitude: 236.967380

Dist. to Sun: 52.875009

Dist. to Moon: 127.545047

Moon coord.: (196.924360 d, -9.381387 d)

Sun coord.: (46.741780 d, 17.529805 d)

Lunar disk: 0.933056

Lunar phase: 29.990110

Lunar bright limb: 288.911107

No SN in this field

2025-05-09 23:43:05 (JD 2460805.488252)

Siderial time 17.428384 h

Ra 03:03:50.40 Dec -35:20:24.00
( 45.960000d, -35.340000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -8.28 Azimuth: 317.74

Sun: Altitude: 35.23 Azimuth: 285.86

Moon: Altitude: -43.94 Azimuth: 142.99

Tunka

Object: Altitude: -21.05 Azimuth: 300.88

Sun: Altitude: 19.89 Azimuth: 266.65

Moon: Altitude: -31.26 Azimuth: 117.13

Kislovodsk

Object: Altitude: -58.10 Azimuth: 268.71

Sun: Altitude: -18.83 Azimuth: 219.90

Moon: Altitude: 8.07 Azimuth: 68.35

Tavrida

Object: Altitude: -64.06 Azimuth: 259.91

Sun: Altitude: -21.61 Azimuth: 211.93

Moon: Altitude: 13.18 Azimuth: 61.76

SAAO

Object: Altitude: -20.06 Azimuth: 343.87

Sun: Altitude: -68.12 Azimuth: 308.41

Moon: Altitude: 40.89 Azimuth: 106.72

IAC

Object: Altitude: -72.69 Azimuth: 61.30

Sun: Altitude: -40.43 Azimuth: 155.30

Moon: Altitude: 50.90 Azimuth: 15.64

Argentina

Object: Altitude: 4.85 Azimuth: 50.92

Sun: Altitude: -23.90 Azimuth: 96.49

Moon: Altitude: 44.58 Azimuth: 250.40

Mexico

Object: Altitude: -1.75 Azimuth: 48.92

Sun: Altitude: 28.64 Azimuth: 94.13

Moon: Altitude: 0.17 Azimuth: 281.34

Ural

Object: Altitude: -46.43 Azimuth: 265.50

Sun: Altitude: -1.89 Azimuth: 232.76

Moon: Altitude: -5.88 Azimuth: 81.40

Vostryakovo

Object: Altitude: -58.49 Azimuth: 245.49

Sun: Altitude: -11.34 Azimuth: 213.74

Moon: Altitude: 6.09 Azimuth: 63.26

Gal. latitude: -60.301067 Gal. longitude: 236.967380

Dist. to Sun: 52.886538

Dist. to Moon: 127.568165

Moon coord.: (197.369772 d, -9.605657 d)

Sun coord.: (46.782407 d, 17.540781 d)

Lunar disk: 0.934992

Lunar phase: 29.543189

Lunar bright limb: 288.721097

No SN in this field

2025-05-14 15:46:22 (JD 2460810.157199)

Siderial time 9.789902 h

Ra 03:03:50.40 Dec -35:20:24.00
( 45.960000d, -35.340000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -73.11 Azimuth: 211.60

Sun: Altitude: -20.80 Azimuth: 185.42

Moon: Altitude: 10.69 Azimuth: 344.97

Tunka

Object: Altitude: -70.86 Azimuth: 144.02

Sun: Altitude: -17.53 Azimuth: 161.07

Moon: Altitude: 2.79 Azimuth: 324.29

Kislovodsk

Object: Altitude: -34.08 Azimuth: 71.39

Sun: Altitude: 5.65 Azimuth: 110.59

Moon: Altitude: -26.73 Azimuth: 283.64

Tavrida

Object: Altitude: -28.72 Azimuth: 67.32

Sun: Altitude: 11.75 Azimuth: 104.79

Moon: Altitude: -32.90 Azimuth: 277.79

SAAO

Object: Altitude: 22.38 Azimuth: 61.34

Sun: Altitude: -0.85 Azimuth: 111.75

Moon: Altitude: -9.43 Azimuth: 311.39

IAC

Object: Altitude: 12.58 Azimuth: 37.51

Sun: Altitude: 51.08 Azimuth: 85.02

Moon: Altitude: -72.96 Azimuth: 272.19

Argentina

Object: Altitude: 83.84 Azimuth: 306.68

Sun: Altitude: 38.30 Azimuth: 193.87

Moon: Altitude: -22.57 Azimuth: 32.01

Mexico

Object: Altitude: 10.21 Azimuth: 322.60

Sun: Altitude: 41.24 Azimuth: 271.71

Moon: Altitude: -26.15 Azimuth: 72.15

Ural

Object: Altitude: -46.54 Azimuth: 94.68

Sun: Altitude: 1.83 Azimuth: 122.73

Moon: Altitude: -20.10 Azimuth: 290.01

Vostryakovo

Object: Altitude: -34.41 Azimuth: 76.00

Sun: Altitude: 12.17 Azimuth: 105.39

Moon: Altitude: -31.55 Azimuth: 273.86

Gal. latitude: -60.301067 Gal. longitude: 236.967380

Dist. to Sun: 54.298011

Dist. to Moon: 111.937980

Moon coord.: (253.424824 d, -27.589512 d)

Sun coord.: (51.362216 d, 18.715519 d)

Lunar disk: 0.963493

Lunar phase: 22.030282

Lunar bright limb: 108.791052

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12541
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 GRB 250509A ( Fermi GBM team, GCN 40406) errorbox  7 sec after notice time and 64 sec after trigger time at 2025-05-09 22:34:33 UT, with upper limit up to  19.5 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = -60 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2866533

We obtain a following upper limits.  

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

      70 | 2025-05-09 22:34:33 |         MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) |   C |    10 | 14.1 |        
     104 | 2025-05-09 22:35:03 |         MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) |   C |    20 | 14.5 |        
     138 | 2025-05-09 22:35:42 |         MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) |   C |    10 | 14.4 |        
     174 | 2025-05-09 22:36:18 |         MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) |   C |    10 | 14.4 |        
     215 | 2025-05-09 22:36:53 |         MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) |   C |    20 | 14.7 |        
     265 | 2025-05-09 22:37:39 |         MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) |   C |    30 | 14.8 |        
     865 | 2025-05-09 22:46:44 |         MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) |   C |   140 | 14.8 |        
    1041 | 2025-05-09 22:49:30 |         MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) |   C |   160 | 16.3 |        
    1227 | 2025-05-09 22:52:36 |         MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) |   C |   160 | 16.5 |        
    1414 | 2025-05-09 22:55:42 |         MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) |   C |   160 | 17.0 |        
    1424 | 2025-05-09 22:55:43 |         MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) |   C |   180 | 18.2 |        
    1600 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) |   C |   160 | 17.1 |        
    1610 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) |   C |   180 | 18.4 |        
    1786 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) |   C |   160 | 17.1 |        
    1796 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) |   C |   180 | 18.3 |        
    1972 | 2025-05-09 23:05:01 |         MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) |   C |   160 | 17.1 |        
    1983 | 2025-05-09 23:05:02 |         MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) |   C |   180 | 18.2 |        
    2159 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) |   C |   160 | 17.1 |        
    2169 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) |   C |   180 | 18.1 |        
    2356 | 2025-05-09 23:11:14 |         MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) |   C |   180 | 18.0 |        
    2531 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) |   C |   160 | 17.1 |        
    2542 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) |   C |   180 | 18.0 |        
    2718 | 2025-05-09 23:17:26 |         MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) |   C |   160 | 17.2 |        
    2728 | 2025-05-09 23:17:27 |         MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) |   C |   180 | 18.0 |        
    2904 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) |   C |   160 | 17.1 |        
    2914 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) |   C |   180 | 17.6 |        
    3090 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) |   C |   160 | 16.9 |        
    3100 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) |   C |   180 | 17.4 |        
    3276 | 2025-05-09 23:26:45 |         MASTER-OAFA | (03h 18m 04.49s , -38d 24m 25.9s) |   C |   160 | 16.9 |        
    3286 | 2025-05-09 23:26:45 |         MASTER-OAFA | (03h 06m 27.50s , -38d 44m 16.0s) |   C |   180 | 17.0 |        
    3462 | 2025-05-09 23:29:51 |         MASTER-OAFA | (03h 18m 05.05s , -38d 24m 32.1s) |   C |   160 | 16.9 |        
    3473 | 2025-05-09 23:29:51 |         MASTER-OAFA | (03h 06m 27.88s , -38d 44m 19.6s) |   C |   180 | 16.8 |        
    3648 | 2025-05-09 23:32:57 |         MASTER-OAFA | (03h 18m 05.47s , -38d 24m 41.3s) |   C |   160 | 16.5 |        
    3658 | 2025-05-09 23:32:57 |         MASTER-OAFA | (03h 06m 28.22s , -38d 44m 26.9s) |   C |   180 | 16.4 |        
    3835 | 2025-05-09 23:36:04 |         MASTER-OAFA | (03h 18m 05.95s , -38d 24m 52.2s) |   C |   160 | 16.4 |        
    3845 | 2025-05-09 23:36:04 |         MASTER-OAFA | (03h 06m 28.59s , -38d 44m 35.3s) |   C |   180 | 15.9 |        
    4022 | 2025-05-09 23:39:10 |         MASTER-OAFA | (03h 18m 06.45s , -38d 25m 03.5s) |   C |   160 | 16.4 |        
    4032 | 2025-05-09 23:39:11 |         MASTER-OAFA | (03h 06m 28.97s , -38d 44m 44.8s) |   C |   180 | 15.6 |        
    4208 | 2025-05-09 23:42:16 |         MASTER-OAFA | (03h 18m 06.88s , -38d 25m 15.1s) |   C |   160 | 16.3 |        
    4218 | 2025-05-09 23:42:17 |         MASTER-OAFA | (03h 06m 29.29s , -38d 44m 53.4s) |   C |   180 | 15.3 |        
    4394 | 2025-05-09 23:45:22 |         MASTER-OAFA | (03h 18m 07.47s , -38d 25m 27.9s) |   C |   160 | 16.5 |        
    4404 | 2025-05-09 23:45:23 |         MASTER-OAFA | (03h 06m 29.54s , -38d 45m 01.5s) |   C |   180 | 15.0 |        
    4580 | 2025-05-09 23:48:29 |         MASTER-OAFA | (03h 18m 08.09s , -38d 25m 41.2s) |   C |   160 | 16.4 |        
    4590 | 2025-05-09 23:48:29 |         MASTER-OAFA | (03h 06m 29.97s , -38d 45m 10.4s) |   C |   180 | 14.1 |        
    4766 | 2025-05-09 23:51:35 |         MASTER-OAFA | (03h 18m 08.69s , -38d 25m 54.4s) |   C |   160 | 16.1 |        
    4953 | 2025-05-09 23:54:42 |         MASTER-OAFA | (03h 18m 09.41s , -38d 26m 09.8s) |   C |   160 | 16.1 |        
    5139 | 2025-05-09 23:57:48 |         MASTER-OAFA | (03h 18m 09.92s , -38d 26m 19.5s) |   C |   160 | 13.1 |        
   38938 | 2025-05-10 09:21:07 |         MASTER-OAFA | (02h 54m 20.52s , -39d 35m 33.8s) |   C |   160 | 18.1 |        
   38948 | 2025-05-10 09:21:07 |         MASTER-OAFA | (03h 07m 17.66s , -39d 10m 13.0s) |   C |   180 | 16.9 |        
   39133 | 2025-05-10 09:24:22 |         MASTER-OAFA | (02h 54m 13.69s , -39d 36m 05.4s) |   C |   160 | 18.3 |        
   39144 | 2025-05-10 09:24:23 |         MASTER-OAFA | (03h 07m 10.69s , -39d 10m 51.0s) |   C |   180 | 17.2 |        
   39331 | 2025-05-10 09:27:40 |         MASTER-OAFA | (02h 54m 13.25s , -39d 34m 57.2s) |   C |   160 | 18.4 |        
   39341 | 2025-05-10 09:27:40 |         MASTER-OAFA | (03h 07m 09.86s , -39d 09m 47.8s) |   C |   180 | 17.8 |        
   39526 | 2025-05-10 09:30:54 |         MASTER-OAFA | (02h 54m 18.67s , -39d 35m 50.5s) |   C |   160 | 18.4 |        
   39536 | 2025-05-10 09:30:55 |         MASTER-OAFA | (03h 07m 15.31s , -39d 10m 44.3s) |   C |   180 | 18.1 |        
   39722 | 2025-05-10 09:34:11 |         MASTER-OAFA | (02h 54m 12.31s , -39d 36m 44.1s) |   C |   160 | 18.5 |        
   39732 | 2025-05-10 09:34:11 |         MASTER-OAFA | (03h 07m 09.04s , -39d 11m 41.0s) |   C |   180 | 18.2 |        
   39919 | 2025-05-10 09:37:28 |         MASTER-OAFA | (02h 54m 17.59s , -39d 36m 16.5s) |   C |   160 | 18.5 |        
   39930 | 2025-05-10 09:37:28 |         MASTER-OAFA | (03h 07m 14.12s , -39d 11m 16.2s) |   C |   180 | 18.5 |        
   40117 | 2025-05-10 09:40:46 |         MASTER-OAFA | (02h 54m 14.63s , -39d 34m 41.0s) |   C |   160 | 18.5 |        
   40127 | 2025-05-10 09:40:46 |         MASTER-OAFA | (03h 07m 10.85s , -39d 09m 43.8s) |   C |   180 | 18.7 |        
   41070 | 2025-05-10 09:57:39 |         MASTER-OAFA | (02h 54m 15.02s , -39d 35m 58.9s) |   C |    40 | 18.0 |        
   41081 | 2025-05-10 09:57:39 |         MASTER-OAFA | (03h 05m 53.93s , -39d 10m 09.8s) |   C |    60 | 19.0 |        
   41392 | 2025-05-10 10:02:01 |         MASTER-OAFA | (02h 54m 14.92s , -39d 33m 55.9s) |   C |   160 | 18.6 |        
   41402 | 2025-05-10 10:02:01 |         MASTER-OAFA | (03h 07m 11.39s , -39d 09m 08.6s) |   C |   180 | 19.5 |        
   42099 | 2025-05-10 10:14:47 |         MASTER-OAFA | (02h 54m 11.62s , -39d 33m 44.1s) |   C |    40 | 17.3 |        
   42109 | 2025-05-10 10:14:48 |         MASTER-OAFA | (03h 05m 50.82s , -39d 08m 01.9s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12529
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 GRB 250509A ( Fermi GBM team, GCN 40406) errorbox  7 sec after notice time and 64 sec after trigger time at 2025-05-09 22:34:33 UT, with upper limit up to  19.5 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = -60 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2866537

We obtain a following upper limits.  

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

      70 | 2025-05-09 22:34:33 |         MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) |   C |    10 | 14.1 |        
     104 | 2025-05-09 22:35:03 |         MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) |   C |    20 | 14.5 |        
     138 | 2025-05-09 22:35:42 |         MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) |   C |    10 | 14.4 |        
     174 | 2025-05-09 22:36:18 |         MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) |   C |    10 | 14.4 |        
     215 | 2025-05-09 22:36:53 |         MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) |   C |    20 | 14.7 |        
     265 | 2025-05-09 22:37:39 |         MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) |   C |    30 | 14.8 |        
     865 | 2025-05-09 22:46:44 |         MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) |   C |   140 | 14.8 |        
    1041 | 2025-05-09 22:49:30 |         MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) |   C |   160 | 16.3 |        
    1227 | 2025-05-09 22:52:36 |         MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) |   C |   160 | 16.5 |        
    1414 | 2025-05-09 22:55:42 |         MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) |   C |   160 | 17.0 |        
    1424 | 2025-05-09 22:55:43 |         MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) |   C |   180 | 18.2 |        
    1600 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) |   C |   160 | 17.1 |        
    1610 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) |   C |   180 | 18.4 |        
    1786 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) |   C |   160 | 17.1 |        
    1796 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) |   C |   180 | 18.3 |        
    1972 | 2025-05-09 23:05:01 |         MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) |   C |   160 | 17.1 |        
    1983 | 2025-05-09 23:05:02 |         MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) |   C |   180 | 18.2 |        
    2159 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) |   C |   160 | 17.1 |        
    2169 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) |   C |   180 | 18.1 |        
    2356 | 2025-05-09 23:11:14 |         MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) |   C |   180 | 18.0 |        
    2531 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) |   C |   160 | 17.1 |        
    2542 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) |   C |   180 | 18.0 |        
    2718 | 2025-05-09 23:17:26 |         MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) |   C |   160 | 17.2 |        
    2728 | 2025-05-09 23:17:27 |         MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) |   C |   180 | 18.0 |        
    2904 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) |   C |   160 | 17.1 |        
    2914 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) |   C |   180 | 17.6 |        
    3090 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) |   C |   160 | 16.9 |        
    3100 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) |   C |   180 | 17.4 |        
    3276 | 2025-05-09 23:26:45 |         MASTER-OAFA | (03h 18m 04.49s , -38d 24m 25.9s) |   C |   160 | 16.9 |        
    3286 | 2025-05-09 23:26:45 |         MASTER-OAFA | (03h 06m 27.50s , -38d 44m 16.0s) |   C |   180 | 17.0 |        
    3462 | 2025-05-09 23:29:51 |         MASTER-OAFA | (03h 18m 05.05s , -38d 24m 32.1s) |   C |   160 | 16.9 |        
    3473 | 2025-05-09 23:29:51 |         MASTER-OAFA | (03h 06m 27.88s , -38d 44m 19.6s) |   C |   180 | 16.8 |        
    3648 | 2025-05-09 23:32:57 |         MASTER-OAFA | (03h 18m 05.47s , -38d 24m 41.3s) |   C |   160 | 16.5 |        
    3658 | 2025-05-09 23:32:57 |         MASTER-OAFA | (03h 06m 28.22s , -38d 44m 26.9s) |   C |   180 | 16.4 |        
    3835 | 2025-05-09 23:36:04 |         MASTER-OAFA | (03h 18m 05.95s , -38d 24m 52.2s) |   C |   160 | 16.4 |        
    3845 | 2025-05-09 23:36:04 |         MASTER-OAFA | (03h 06m 28.59s , -38d 44m 35.3s) |   C |   180 | 15.9 |        
    4022 | 2025-05-09 23:39:10 |         MASTER-OAFA | (03h 18m 06.45s , -38d 25m 03.5s) |   C |   160 | 16.4 |        
    4032 | 2025-05-09 23:39:11 |         MASTER-OAFA | (03h 06m 28.97s , -38d 44m 44.8s) |   C |   180 | 15.6 |        
    4208 | 2025-05-09 23:42:16 |         MASTER-OAFA | (03h 18m 06.88s , -38d 25m 15.1s) |   C |   160 | 16.3 |        
    4218 | 2025-05-09 23:42:17 |         MASTER-OAFA | (03h 06m 29.29s , -38d 44m 53.4s) |   C |   180 | 15.3 |        
    4394 | 2025-05-09 23:45:22 |         MASTER-OAFA | (03h 18m 07.47s , -38d 25m 27.9s) |   C |   160 | 16.5 |        
    4404 | 2025-05-09 23:45:23 |         MASTER-OAFA | (03h 06m 29.54s , -38d 45m 01.5s) |   C |   180 | 15.0 |        
    4580 | 2025-05-09 23:48:29 |         MASTER-OAFA | (03h 18m 08.09s , -38d 25m 41.2s) |   C |   160 | 16.4 |        
    4590 | 2025-05-09 23:48:29 |         MASTER-OAFA | (03h 06m 29.97s , -38d 45m 10.4s) |   C |   180 | 14.1 |        
    4766 | 2025-05-09 23:51:35 |         MASTER-OAFA | (03h 18m 08.69s , -38d 25m 54.4s) |   C |   160 | 16.1 |        
    4953 | 2025-05-09 23:54:42 |         MASTER-OAFA | (03h 18m 09.41s , -38d 26m 09.8s) |   C |   160 | 16.1 |        
    5139 | 2025-05-09 23:57:48 |         MASTER-OAFA | (03h 18m 09.92s , -38d 26m 19.5s) |   C |   160 | 13.1 |        
   38938 | 2025-05-10 09:21:07 |         MASTER-OAFA | (02h 54m 20.52s , -39d 35m 33.8s) |   C |   160 | 18.1 |        
   38948 | 2025-05-10 09:21:07 |         MASTER-OAFA | (03h 07m 17.66s , -39d 10m 13.0s) |   C |   180 | 16.9 |        
   39133 | 2025-05-10 09:24:22 |         MASTER-OAFA | (02h 54m 13.69s , -39d 36m 05.4s) |   C |   160 | 18.3 |        
   39144 | 2025-05-10 09:24:23 |         MASTER-OAFA | (03h 07m 10.69s , -39d 10m 51.0s) |   C |   180 | 17.2 |        
   39331 | 2025-05-10 09:27:40 |         MASTER-OAFA | (02h 54m 13.25s , -39d 34m 57.2s) |   C |   160 | 18.4 |        
   39341 | 2025-05-10 09:27:40 |         MASTER-OAFA | (03h 07m 09.86s , -39d 09m 47.8s) |   C |   180 | 17.8 |        
   39526 | 2025-05-10 09:30:54 |         MASTER-OAFA | (02h 54m 18.67s , -39d 35m 50.5s) |   C |   160 | 18.4 |        
   39536 | 2025-05-10 09:30:55 |         MASTER-OAFA | (03h 07m 15.31s , -39d 10m 44.3s) |   C |   180 | 18.1 |        
   39722 | 2025-05-10 09:34:11 |         MASTER-OAFA | (02h 54m 12.31s , -39d 36m 44.1s) |   C |   160 | 18.5 |        
   39732 | 2025-05-10 09:34:11 |         MASTER-OAFA | (03h 07m 09.04s , -39d 11m 41.0s) |   C |   180 | 18.2 |        
   39919 | 2025-05-10 09:37:28 |         MASTER-OAFA | (02h 54m 17.59s , -39d 36m 16.5s) |   C |   160 | 18.5 |        
   39930 | 2025-05-10 09:37:28 |         MASTER-OAFA | (03h 07m 14.12s , -39d 11m 16.2s) |   C |   180 | 18.5 |        
   40117 | 2025-05-10 09:40:46 |         MASTER-OAFA | (02h 54m 14.63s , -39d 34m 41.0s) |   C |   160 | 18.5 |        
   40127 | 2025-05-10 09:40:46 |         MASTER-OAFA | (03h 07m 10.85s , -39d 09m 43.8s) |   C |   180 | 18.7 |        
   41070 | 2025-05-10 09:57:39 |         MASTER-OAFA | (02h 54m 15.02s , -39d 35m 58.9s) |   C |    40 | 18.0 |        
   41081 | 2025-05-10 09:57:39 |         MASTER-OAFA | (03h 05m 53.93s , -39d 10m 09.8s) |   C |    60 | 19.0 |        
   41392 | 2025-05-10 10:02:01 |         MASTER-OAFA | (02h 54m 14.92s , -39d 33m 55.9s) |   C |   160 | 18.6 |        
   41402 | 2025-05-10 10:02:01 |         MASTER-OAFA | (03h 07m 11.39s , -39d 09m 08.6s) |   C |   180 | 19.5 |        
   42099 | 2025-05-10 10:14:47 |         MASTER-OAFA | (02h 54m 11.62s , -39d 33m 44.1s) |   C |    40 | 17.3 |        
   42109 | 2025-05-10 10:14:48 |         MASTER-OAFA | (03h 05m 50.82s , -39d 08m 01.9s) |   C |    60 | 18.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12525
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 GRB 250509A ( Fermi GBM team, GCN 40406) errorbox  7 sec after notice time and 64 sec after trigger time at 2025-05-09 22:34:33 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = -60 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2866536

We obtain a following upper limits.  

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

      70 | 2025-05-09 22:34:33 |         MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) |   C |    10 | 14.1 |        
     104 | 2025-05-09 22:35:03 |         MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) |   C |    20 | 14.5 |        
     138 | 2025-05-09 22:35:42 |         MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) |   C |    10 | 14.4 |        
     174 | 2025-05-09 22:36:18 |         MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) |   C |    10 | 14.4 |        
     215 | 2025-05-09 22:36:53 |         MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) |   C |    20 | 14.7 |        
     265 | 2025-05-09 22:37:39 |         MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) |   C |    30 | 14.8 |        
     865 | 2025-05-09 22:46:44 |         MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) |   C |   140 | 14.8 |        
    1041 | 2025-05-09 22:49:30 |         MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) |   C |   160 | 16.3 |        
    1227 | 2025-05-09 22:52:36 |         MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) |   C |   160 | 16.5 |        
    1414 | 2025-05-09 22:55:42 |         MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) |   C |   160 | 17.0 |        
    1424 | 2025-05-09 22:55:43 |         MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) |   C |   180 | 18.2 |        
    1600 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) |   C |   160 | 17.1 |        
    1610 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) |   C |   180 | 18.4 |        
    1786 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) |   C |   160 | 17.1 |        
    1796 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) |   C |   180 | 18.3 |        
    1972 | 2025-05-09 23:05:01 |         MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) |   C |   160 | 17.1 |        
    1983 | 2025-05-09 23:05:02 |         MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) |   C |   180 | 18.2 |        
    2159 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) |   C |   160 | 17.1 |        
    2169 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) |   C |   180 | 18.1 |        
    2356 | 2025-05-09 23:11:14 |         MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) |   C |   180 | 18.0 |        
    2531 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) |   C |   160 | 17.1 |        
    2542 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) |   C |   180 | 18.0 |        
    2718 | 2025-05-09 23:17:26 |         MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) |   C |   160 | 17.2 |        
    2728 | 2025-05-09 23:17:27 |         MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) |   C |   180 | 18.0 |        
    2904 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) |   C |   160 | 17.1 |        
    2914 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) |   C |   180 | 17.6 |        
    3090 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) |   C |   160 | 16.9 |        
    3100 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) |   C |   180 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12524
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 GRB 250509A ( Fermi GBM team, GCN 40406) errorbox  7 sec after notice time and 64 sec after trigger time at 2025-05-09 22:34:33 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = -60 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2866536

We obtain a following upper limits.  

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

      70 | 2025-05-09 22:34:33 |         MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) |   C |    10 | 14.1 |        
     104 | 2025-05-09 22:35:03 |         MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) |   C |    20 | 14.5 |        
     138 | 2025-05-09 22:35:42 |         MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) |   C |    10 | 14.4 |        
     174 | 2025-05-09 22:36:18 |         MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) |   C |    10 | 14.4 |        
     215 | 2025-05-09 22:36:53 |         MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) |   C |    20 | 14.7 |        
     265 | 2025-05-09 22:37:39 |         MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) |   C |    30 | 14.8 |        
     865 | 2025-05-09 22:46:44 |         MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) |   C |   140 | 14.8 |        
    1041 | 2025-05-09 22:49:30 |         MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) |   C |   160 | 16.3 |        
    1227 | 2025-05-09 22:52:36 |         MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) |   C |   160 | 16.5 |        
    1414 | 2025-05-09 22:55:42 |         MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) |   C |   160 | 17.0 |        
    1424 | 2025-05-09 22:55:43 |         MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) |   C |   180 | 18.2 |        
    1600 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) |   C |   160 | 17.1 |        
    1610 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) |   C |   180 | 18.4 |        
    1786 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) |   C |   160 | 17.1 |        
    1796 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) |   C |   180 | 18.3 |        
    1972 | 2025-05-09 23:05:01 |         MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) |   C |   160 | 17.1 |        
    1983 | 2025-05-09 23:05:02 |         MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) |   C |   180 | 18.2 |        
    2159 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) |   C |   160 | 17.1 |        
    2169 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) |   C |   180 | 18.1 |        
    2356 | 2025-05-09 23:11:14 |         MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) |   C |   180 | 18.0 |        
    2531 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) |   C |   160 | 17.1 |        
    2542 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) |   C |   180 | 18.0 |        
    2718 | 2025-05-09 23:17:26 |         MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) |   C |   160 | 17.2 |        
    2728 | 2025-05-09 23:17:27 |         MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) |   C |   180 | 18.0 |        
    2904 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) |   C |   160 | 17.1 |        
    2914 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) |   C |   180 | 17.6 |        
    3090 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) |   C |   160 | 16.9 |        
    3100 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) |   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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  ID = 12523
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 GRB 250509A ( Fermi GBM team, GCN 40406) errorbox  7 sec after notice time and 64 sec after trigger time at 2025-05-09 22:34:33 UT, with upper limit up to  18.4 mag. Observations started at twilight.  The observations began at zenith distance = 70 deg. The sun  altitude  is -9.7 deg. 

The galactic latitude b = -60 deg., longitude l = 237 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2866536

We obtain a following upper limits.  

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

      70 | 2025-05-09 22:34:33 |         MASTER-OAFA | (03h 18m 00.28s , -38d 23m 19.1s) |   C |    10 | 14.1 |        
     104 | 2025-05-09 22:35:03 |         MASTER-OAFA | (03h 18m 00.24s , -38d 23m 19.1s) |   C |    20 | 14.5 |        
     138 | 2025-05-09 22:35:42 |         MASTER-OAFA | (03h 18m 00.14s , -38d 23m 18.9s) |   C |    10 | 14.4 |        
     174 | 2025-05-09 22:36:18 |         MASTER-OAFA | (03h 18m 00.11s , -38d 23m 18.5s) |   C |    10 | 14.4 |        
     215 | 2025-05-09 22:36:53 |         MASTER-OAFA | (03h 18m 00.10s , -38d 23m 18.6s) |   C |    20 | 14.7 |        
     265 | 2025-05-09 22:37:39 |         MASTER-OAFA | (03h 18m 00.12s , -38d 23m 19.3s) |   C |    30 | 14.8 |        
     865 | 2025-05-09 22:46:44 |         MASTER-OAFA | (03h 18m 00.32s , -38d 23m 28.0s) |   C |   140 | 14.8 |        
    1041 | 2025-05-09 22:49:30 |         MASTER-OAFA | (03h 18m 00.52s , -38d 23m 31.2s) |   C |   160 | 16.3 |        
    1227 | 2025-05-09 22:52:36 |         MASTER-OAFA | (03h 18m 00.73s , -38d 23m 34.3s) |   C |   160 | 16.5 |        
    1414 | 2025-05-09 22:55:42 |         MASTER-OAFA | (03h 18m 01.03s , -38d 23m 38.0s) |   C |   160 | 17.0 |        
    1424 | 2025-05-09 22:55:43 |         MASTER-OAFA | (03h 06m 24.43s , -38d 43m 44.4s) |   C |   180 | 18.2 |        
    1600 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 18m 01.35s , -38d 23m 42.3s) |   C |   160 | 17.1 |        
    1610 | 2025-05-09 22:58:49 |         MASTER-OAFA | (03h 06m 24.67s , -38d 43m 47.0s) |   C |   180 | 18.4 |        
    1786 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 18m 01.74s , -38d 23m 46.7s) |   C |   160 | 17.1 |        
    1796 | 2025-05-09 23:01:55 |         MASTER-OAFA | (03h 06m 24.96s , -38d 43m 50.0s) |   C |   180 | 18.3 |        
    1972 | 2025-05-09 23:05:01 |         MASTER-OAFA | (03h 18m 02.05s , -38d 23m 50.9s) |   C |   160 | 17.1 |        
    1983 | 2025-05-09 23:05:02 |         MASTER-OAFA | (03h 06m 25.27s , -38d 43m 53.2s) |   C |   180 | 18.2 |        
    2159 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 18m 02.30s , -38d 23m 55.2s) |   C |   160 | 17.1 |        
    2169 | 2025-05-09 23:08:08 |         MASTER-OAFA | (03h 06m 25.58s , -38d 43m 56.5s) |   C |   180 | 18.1 |        
    2356 | 2025-05-09 23:11:14 |         MASTER-OAFA | (03h 06m 25.97s , -38d 44m 00.1s) |   C |   180 | 18.0 |        
    2531 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 18m 02.98s , -38d 24m 03.8s) |   C |   160 | 17.1 |        
    2542 | 2025-05-09 23:14:20 |         MASTER-OAFA | (03h 06m 26.35s , -38d 44m 03.6s) |   C |   180 | 18.0 |        
    2718 | 2025-05-09 23:17:26 |         MASTER-OAFA | (03h 18m 03.37s , -38d 24m 09.0s) |   C |   160 | 17.2 |        
    2728 | 2025-05-09 23:17:27 |         MASTER-OAFA | (03h 06m 26.66s , -38d 44m 06.7s) |   C |   180 | 18.0 |        
    2904 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 18m 03.73s , -38d 24m 14.1s) |   C |   160 | 17.1 |        
    2914 | 2025-05-09 23:20:33 |         MASTER-OAFA | (03h 06m 26.94s , -38d 44m 08.8s) |   C |   180 | 17.6 |        
    3090 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 18m 04.07s , -38d 24m 19.9s) |   C |   160 | 16.9 |        
    3100 | 2025-05-09 23:23:39 |         MASTER-OAFA | (03h 06m 27.22s , -38d 44m 12.4s) |   C |   180 | 17.4 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025