MASTER Net MASTER Database: GRB250416.75 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 EP GRB250416.75
Trignum 1744826039
Trigger time 2025-04-16 17:53:59
Notice time 2025-04-17 03:12:34.126585
Coord, eb (17h 05m 36.48s , +25d 46m 04.8s) , 0.01
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
2845513 2025-04-17 03:12:34.126585 17h 05m 36.48s +25d 46m 04.8s EP 0.01 alert 1744826039 0 1115 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

2025-04-16 17:53:59 (JD 2460782.245822)

Siderial time 10.082794 h

Ra 17:05:36.48 Dec 25:46:04.80
(256.402000d, 25.768000d)

Rise 2025-04-17 15:43:59

Transit 2025-04-17 00:53:28

Set 2025-04-17 09:59:01

Amur

Object: Altitude: 62.78 Azimuth: 328.71

Sun: Altitude: -21.62 Azimuth: 218.91

Moon: Altitude: 13.26 Azimuth: 356.85

Tunka

Object: Altitude: 50.35 Azimuth: 295.60

Sun: Altitude: -27.06 Azimuth: 193.26

Moon: Altitude: 8.10 Azimuth: 335.00

Kislovodsk

Object: Altitude: 10.65 Azimuth: 244.38

Sun: Altitude: -20.31 Azimuth: 128.14

Moon: Altitude: -16.79 Azimuth: 290.69

Tavrida

Object: Altitude: 5.75 Azimuth: 238.98

Sun: Altitude: -14.74 Azimuth: 121.35

Moon: Altitude: -22.89 Azimuth: 285.09

SAAO

Object: Altitude: -39.45 Azimuth: 261.68

Sun: Altitude: -22.09 Azimuth: 88.32

Moon: Altitude: -1.27 Azimuth: 302.69

IAC

Object: Altitude: -32.38 Azimuth: 202.16

Sun: Altitude: 20.27 Azimuth: 90.98

Moon: Altitude: -61.08 Azimuth: 273.92

Argentina

Object: Altitude: -61.33 Azimuth: 86.11

Sun: Altitude: 43.93 Azimuth: 152.74

Moon: Altitude: -28.72 Azimuth: 20.69

Mexico

Object: Altitude: 0.04 Azimuth: 120.46

Sun: Altitude: 61.22 Azimuth: 311.58

Moon: Altitude: -36.71 Azimuth: 78.60

Ural

Object: Altitude: 24.99 Azimuth: 260.63

Sun: Altitude: -17.85 Azimuth: 147.26

Moon: Altitude: -12.52 Azimuth: 299.57

Vostryakovo

Object: Altitude: 13.04 Azimuth: 243.26

Sun: Altitude: -10.80 Azimuth: 126.59

Moon: Altitude: -23.14 Azimuth: 283.35

Gal. latitude: 33.274184 Gal. longitude: 47.212657

Dist. to Sun: 118.146999

Dist. to Moon: 53.371632

Moon coord.: (244.533330 d, -26.361943 d)

Sun coord.: (24.709935 d, 10.276679 d)

Lunar disk: 0.878684

Lunar phase: 40.767335

Lunar bright limb: 105.566440

No SN in this field

2025-04-17 03:12:34 (JD 2460782.633727)

Siderial time 19.418006 h

Ra 17:05:36.48 Dec 25:46:04.80
(256.402000d, 25.768000d)

Rise 2025-04-17 15:43:59

Transit 2025-04-17 00:53:28

Set 2025-04-17 09:59:01

Amur

Object: Altitude: 0.40 Azimuth: 132.26

Sun: Altitude: 49.96 Azimuth: 353.98

Moon: Altitude: -46.72 Azimuth: 103.62

Tunka

Object: Altitude: 14.00 Azimuth: 114.06

Sun: Altitude: 42.63 Azimuth: 320.60

Moon: Altitude: -31.38 Azimuth: 84.79

Kislovodsk

Object: Altitude: 53.19 Azimuth: 74.06

Sun: Altitude: 7.97 Azimuth: 263.19

Moon: Altitude: 7.23 Azimuth: 40.58

Tavrida

Object: Altitude: 58.52 Azimuth: 63.51

Sun: Altitude: 2.13 Azimuth: 257.42

Moon: Altitude: 10.14 Azimuth: 33.81

SAAO

Object: Altitude: 29.36 Azimuth: 161.32

Sun: Altitude: -22.90 Azimuth: 272.04

Moon: Altitude: 67.91 Azimuth: 97.06

IAC

Object: Altitude: 72.68 Azimuth: 273.91

Sun: Altitude: -40.40 Azimuth: 223.30

Moon: Altitude: 33.21 Azimuth: 346.69

Argentina

Object: Altitude: 0.37 Azimuth: 238.97

Sun: Altitude: -61.28 Azimuth: 46.46

Moon: Altitude: 33.81 Azimuth: 283.42

Mexico

Object: Altitude: -4.52 Azimuth: 236.17

Sun: Altitude: -17.75 Azimuth: 114.47

Moon: Altitude: -26.79 Azimuth: 287.09

Ural

Object: Altitude: 39.28 Azimuth: 76.76

Sun: Altitude: 18.55 Azimuth: 279.61

Moon: Altitude: -9.67 Azimuth: 53.87

Vostryakovo

Object: Altitude: 50.95 Azimuth: 55.19

Sun: Altitude: 6.52 Azimuth: 261.10

Moon: Altitude: 0.02 Azimuth: 36.36

Gal. latitude: 33.274184 Gal. longitude: 47.212657

Dist. to Sun: 118.348017

Dist. to Moon: 53.371585

Moon coord.: (249.651035 d, -27.206083 d)

Sun coord.: (25.069615 d, 10.413607 d)

Lunar disk: 0.853430

Lunar phase: 45.020046

Lunar bright limb: 102.996048

No SN in this field

2025-04-17 04:12:34 (JD 2460782.675394)

Siderial time 20.420744 h

Ra 17:05:36.48 Dec 25:46:04.80
(256.402000d, 25.768000d)

Rise 2025-04-17 15:43:59

Transit 2025-04-17 00:53:28

Set 2025-04-17 09:59:01

Amur

Object: Altitude: -6.00 Azimuth: 144.21

Sun: Altitude: 49.08 Azimuth: 16.75

Moon: Altitude: -55.40 Azimuth: 118.86

Tunka

Object: Altitude: 5.92 Azimuth: 125.10

Sun: Altitude: 47.21 Azimuth: 340.47

Moon: Altitude: -40.38 Azimuth: 96.19

Kislovodsk

Object: Altitude: 42.49 Azimuth: 86.52

Sun: Altitude: 18.80 Azimuth: 273.51

Moon: Altitude: -0.33 Azimuth: 51.02

Tavrida

Object: Altitude: 48.41 Azimuth: 78.80

Sun: Altitude: 12.70 Azimuth: 267.82

Moon: Altitude: 3.54 Azimuth: 44.95

SAAO

Object: Altitude: 23.85 Azimuth: 147.47

Sun: Altitude: -10.26 Azimuth: 264.08

Moon: Altitude: 55.72 Azimuth: 88.08

IAC

Object: Altitude: 85.47 Azimuth: 303.00

Sun: Altitude: -30.26 Azimuth: 236.49

Moon: Altitude: 34.38 Azimuth: 2.13

Argentina

Object: Altitude: 10.80 Azimuth: 230.28

Sun: Altitude: -67.98 Azimuth: 15.21

Moon: Altitude: 45.94 Azimuth: 277.76

Mexico

Object: Altitude: 6.64 Azimuth: 243.85

Sun: Altitude: -28.91 Azimuth: 125.02

Moon: Altitude: -15.17 Azimuth: 293.03

Ural

Object: Altitude: 31.17 Azimuth: 90.06

Sun: Altitude: 26.38 Azimuth: 293.17

Moon: Altitude: -16.52 Azimuth: 65.07

Vostryakovo

Object: Altitude: 43.31 Azimuth: 71.71

Sun: Altitude: 15.03 Azimuth: 273.39

Moon: Altitude: -5.57 Azimuth: 47.98

Gal. latitude: 33.274184 Gal. longitude: 47.212657

Dist. to Sun: 118.369549

Dist. to Moon: 53.388265

Moon coord.: (250.206281 d, -27.285850 d)

Sun coord.: (25.108264 d, 10.428289 d)

Lunar disk: 0.850592

Lunar phase: 45.477975

Lunar bright limb: 102.717071

No SN in this field

2025-04-22 02:33:49 (JD 2460787.606817)

Siderial time 19.098953 h

Ra 17:05:36.48 Dec 25:46:04.80
(256.402000d, 25.768000d)

Rise 2025-04-22 15:24:20

Transit 2025-04-22 00:33:49

Set 2025-04-22 09:39:22

Amur

Object: Altitude: 2.72 Azimuth: 128.63

Sun: Altitude: 50.27 Azimuth: 339.31

Moon: Altitude: 3.19 Azimuth: 53.25

Tunka

Object: Altitude: 16.74 Azimuth: 110.60

Sun: Altitude: 40.01 Azimuth: 308.57

Moon: Altitude: 12.54 Azimuth: 32.45

Kislovodsk

Object: Altitude: 56.47 Azimuth: 69.20

Sun: Altitude: 2.47 Azimuth: 255.54

Moon: Altitude: 21.90 Azimuth: 332.88

Tavrida

Object: Altitude: 61.48 Azimuth: 57.23

Sun: Altitude: -3.04 Azimuth: 249.58

Moon: Altitude: 17.92 Azimuth: 325.22

SAAO

Object: Altitude: 30.49 Azimuth: 166.11

Sun: Altitude: -31.71 Azimuth: 275.70

Moon: Altitude: 45.12 Azimuth: 266.07

IAC

Object: Altitude: 68.47 Azimuth: 271.11

Sun: Altitude: -44.01 Azimuth: 211.57

Moon: Altitude: -5.69 Azimuth: 289.44

Argentina

Object: Altitude: -3.16 Azimuth: 241.44

Sun: Altitude: -56.01 Azimuth: 61.49

Moon: Altitude: -24.90 Azimuth: 316.65

Mexico

Object: Altitude: -7.88 Azimuth: 233.45

Sun: Altitude: -9.28 Azimuth: 110.30

Moon: Altitude: -78.74 Azimuth: 181.81

Ural

Object: Altitude: 41.79 Azimuth: 72.15

Sun: Altitude: 14.88 Azimuth: 270.58

Moon: Altitude: 12.74 Azimuth: 350.65

Vostryakovo

Object: Altitude: 53.09 Azimuth: 49.11

Sun: Altitude: 2.73 Azimuth: 252.48

Moon: Altitude: 10.22 Azimuth: 330.09

Gal. latitude: 33.274184 Gal. longitude: 47.212657

Dist. to Sun: 120.830625

Dist. to Moon: 75.259836

Moon coord.: (318.106610 d, -19.794836 d)

Sun coord.: (29.703024 d, 12.129195 d)

Lunar disk: 0.391833

Lunar phase: 102.493833

Lunar bright limb: 71.945248

No SN in this field
Recent coverage and limits telegrams

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

  ID = 12432
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) was pointed to the EP250416a ( EP Team et al., GCN 40154) errorbox  3581 sec after notice time and 37096 sec after trigger time at 2025-04-17 04:12:15 UT, with upper limit up to  19.8 mag. The observations began at zenith distance = 79 deg. The sun  altitude  is -68.8 deg. 

The galactic latitude b = 33 deg., longitude l = 47 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2845513

We obtain a following upper limits.  

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

   37127 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.87s , +25d 40m 55.7s) |   C |    60 | 16.5 |        
   37187 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.85s , +25d 40m 55.5s) |   C |   180 | 17.7 |  Coadd 
   37590 | 2025-04-17 04:19:58 |         MASTER-OAFA | (17h 05m 56.72s , +25d 41m 13.9s) |   C |    60 | 17.3 |        
   38093 | 2025-04-17 04:28:21 |         MASTER-OAFA | (17h 06m 00.04s , +25d 40m 57.5s) |   C |    60 | 17.5 |        
   38511 | 2025-04-17 04:35:20 |         MASTER-OAFA | (17h 05m 58.06s , +25d 40m 40.2s) |   C |    60 | 17.7 |        
   39442 | 2025-04-17 04:50:50 |         MASTER-OAFA | (17h 06m 00.53s , +25d 42m 42.8s) |   C |    60 | 18.2 |        
   42790 | 2025-04-17 05:46:53 |         MASTER-OAFA | (17h 05m 53.96s , +25d 43m 05.1s) |   C |    30 | 18.5 |        
   42820 | 2025-04-17 05:46:53 |         MASTER-OAFA | (17h 05m 53.96s , +25d 43m 05.0s) |   C |    90 | 18.9 |  Coadd 
   43015 | 2025-04-17 05:46:53 |         MASTER-OAFA | (17h 05m 53.95s , +25d 43m 05.0s) |   C |   480 | 19.8 |  Coadd 
   42835 | 2025-04-17 05:47:38 |         MASTER-OAFA | (17h 05m 47.66s , +25d 42m 15.1s) |   C |    30 | 18.2 |        
   42880 | 2025-04-17 05:48:23 |         MASTER-OAFA | (17h 05m 46.41s , +25d 43m 23.9s) |   C |    30 | 16.0 |        
   42923 | 2025-04-17 05:49:07 |         MASTER-OAFA | (17h 05m 52.89s , +25d 42m 15.3s) |   C |    30 | 15.8 |        
   42969 | 2025-04-17 05:49:52 |         MASTER-OAFA | (17h 05m 46.51s , +25d 41m 17.0s) |   C |    30 | 16.0 |        
   43019 | 2025-04-17 05:50:42 |         MASTER-OAFA | (17h 05m 51.92s , +25d 41m 19.2s) |   C |    30 | 18.3 |        
   43064 | 2025-04-17 05:51:28 |         MASTER-OAFA | (17h 05m 49.53s , +25d 43m 02.2s) |   C |    30 | 18.5 |        
   43094 | 2025-04-17 05:51:28 |         MASTER-OAFA | (17h 05m 49.53s , +25d 43m 02.2s) |   C |    90 | 19.2 |  Coadd 
   43111 | 2025-04-17 05:52:15 |         MASTER-OAFA | (17h 05m 49.32s , +25d 41m 24.3s) |   C |    30 | 18.5 |        
   43159 | 2025-04-17 05:53:02 |         MASTER-OAFA | (17h 05m 51.33s , +25d 42m 57.9s) |   C |    30 | 18.4 |        
   43208 | 2025-04-17 05:53:52 |         MASTER-OAFA | (17h 05m 44.90s , +25d 42m 08.7s) |   C |    30 | 18.5 |        
   43238 | 2025-04-17 05:53:52 |         MASTER-OAFA | (17h 05m 44.90s , +25d 42m 08.7s) |   C |    90 | 19.2 |  Coadd 
   43257 | 2025-04-17 05:54:40 |         MASTER-OAFA | (17h 05m 45.82s , +25d 43m 07.1s) |   C |    30 | 18.5 |        
   43300 | 2025-04-17 05:55:24 |         MASTER-OAFA | (17h 05m 51.41s , +25d 42m 06.5s) |   C |    30 | 18.4 |        
   43347 | 2025-04-17 05:56:10 |         MASTER-OAFA | (17h 05m 44.66s , +25d 41m 05.4s) |   C |    30 | 18.3 |        
   43377 | 2025-04-17 05:56:10 |         MASTER-OAFA | (17h 05m 44.66s , +25d 41m 05.5s) |   C |    90 | 18.9 |  Coadd 
   43400 | 2025-04-17 05:57:03 |         MASTER-OAFA | (17h 05m 51.64s , +25d 41m 25.3s) |   C |    30 | 18.3 |        
   43447 | 2025-04-17 05:57:50 |         MASTER-OAFA | (17h 05m 47.84s , +25d 42m 37.9s) |   C |    30 | 18.2 |        
   43497 | 2025-04-17 05:58:40 |         MASTER-OAFA | (17h 05m 47.62s , +25d 41m 03.8s) |   C |    30 | 17.7 |        
   43545 | 2025-04-17 05:59:29 |         MASTER-OAFA | (17h 05m 51.03s , +25d 42m 43.8s) |   C |    30 | 17.7 |        
   43592 | 2025-04-17 06:00:15 |         MASTER-OAFA | (17h 05m 43.17s , +25d 41m 59.8s) |   C |    30 | 17.6 |        
   43638 | 2025-04-17 06:01:02 |         MASTER-OAFA | (17h 05m 43.70s , +25d 43m 01.2s) |   C |    30 | 18.2 |        
   43668 | 2025-04-17 06:01:02 |         MASTER-OAFA | (17h 05m 43.69s , +25d 43m 01.2s) |   C |    90 | 19.0 |  Coadd 
   43686 | 2025-04-17 06:01:49 |         MASTER-OAFA | (17h 05m 49.96s , +25d 41m 59.3s) |   C |    30 | 18.4 |        
   43735 | 2025-04-17 06:02:38 |         MASTER-OAFA | (17h 05m 43.89s , +25d 40m 57.3s) |   C |    30 | 18.4 |        
   43778 | 2025-04-17 06:03:21 |         MASTER-OAFA | (17h 05m 48.01s , +25d 41m 14.0s) |   C |    30 | 18.4 |        
   43843 | 2025-04-17 06:04:11 |         MASTER-OAFA | (17h 05m 45.91s , +25d 42m 50.2s) |   C |    60 | 18.6 |        
   44536 | 2025-04-17 06:15:44 |         MASTER-OAFA | (17h 05m 39.86s , +25d 42m 16.5s) |   C |    60 | 18.9 |        
   44619 | 2025-04-17 06:17:08 |         MASTER-OAFA | (17h 05m 44.11s , +25d 41m 13.9s) |   C |    60 | 18.8 |        
   44700 | 2025-04-17 06:18:28 |         MASTER-OAFA | (17h 05m 38.57s , +25d 40m 10.3s) |   C |    60 | 18.9 |        
   44776 | 2025-04-17 06:19:44 |         MASTER-OAFA | (17h 05m 42.89s , +25d 40m 29.2s) |   C |    60 | 18.9 |        
   44852 | 2025-04-17 06:21:00 |         MASTER-OAFA | (17h 05m 40.28s , +25d 41m 51.5s) |   C |    60 | 18.8 |        
   44912 | 2025-04-17 06:21:00 |         MASTER-OAFA | (17h 05m 40.29s , +25d 41m 51.5s) |   C |   180 | 19.5 |  Coadd 
   44929 | 2025-04-17 06:22:17 |         MASTER-OAFA | (17h 05m 39.79s , +25d 40m 03.1s) |   C |    60 | 18.8 |        
   45006 | 2025-04-17 06:23:35 |         MASTER-OAFA | (17h 05m 41.83s , +25d 41m 41.2s) |   C |    60 | 18.8 |        
   45085 | 2025-04-17 06:24:53 |         MASTER-OAFA | (17h 05m 34.81s , +25d 40m 50.3s) |   C |    60 | 18.9 |        
   45145 | 2025-04-17 06:24:53 |         MASTER-OAFA | (17h 05m 34.81s , +25d 40m 50.3s) |   C |   180 | 19.6 |  Coadd 
   45159 | 2025-04-17 06:26:08 |         MASTER-OAFA | (17h 05m 36.14s , +25d 41m 46.2s) |   C |    60 | 18.8 |        
   45633 | 2025-04-17 06:34:02 |         MASTER-OAFA | (17h 05m 37.47s , +25d 40m 10.1s) |   C |    60 | 18.9 |        
   45711 | 2025-04-17 06:35:19 |         MASTER-OAFA | (17h 05m 31.88s , +25d 39m 06.1s) |   C |    60 | 18.9 |        
   45771 | 2025-04-17 06:35:19 |         MASTER-OAFA | (17h 05m 31.88s , +25d 39m 06.1s) |   C |   180 | 19.5 |  Coadd 
   45787 | 2025-04-17 06:36:36 |         MASTER-OAFA | (17h 05m 37.19s , +25d 39m 28.8s) |   C |    60 | 18.8 |        
   45862 | 2025-04-17 06:37:50 |         MASTER-OAFA | (17h 05m 33.41s , +25d 40m 49.4s) |   C |    60 | 18.8 |        
   45939 | 2025-04-17 06:39:08 |         MASTER-OAFA | (17h 05m 32.84s , +25d 39m 11.1s) |   C |    60 | 18.7 |        
   45999 | 2025-04-17 06:39:08 |         MASTER-OAFA | (17h 05m 32.84s , +25d 39m 11.1s) |   C |   180 | 19.4 |  Coadd 
   46016 | 2025-04-17 06:40:24 |         MASTER-OAFA | (17h 05m 34.82s , +25d 40m 22.2s) |   C |    60 | 18.7 |        
   46093 | 2025-04-17 06:41:41 |         MASTER-OAFA | (17h 05m 29.15s , +25d 39m 40.1s) |   C |    60 | 18.8 |        
   46171 | 2025-04-17 06:42:59 |         MASTER-OAFA | (17h 05m 27.47s , +25d 40m 34.0s) |   C |    60 | 18.9 |        
   46231 | 2025-04-17 06:42:59 |         MASTER-OAFA | (17h 05m 27.47s , +25d 40m 34.1s) |   C |   180 | 19.6 |  Coadd 
   46249 | 2025-04-17 06:44:18 |         MASTER-OAFA | (17h 05m 33.77s , +25d 39m 28.5s) |   C |    60 | 18.9 |        
   46837 | 2025-04-17 06:54:06 |         MASTER-OAFA | (17h 05m 23.33s , +25d 37m 34.6s) |   C |    60 | 19.0 |        
   46913 | 2025-04-17 06:55:22 |         MASTER-OAFA | (17h 05m 27.11s , +25d 37m 55.5s) |   C |    60 | 18.8 |        
   48011 | 2025-04-17 07:13:39 |         MASTER-OAFA | (17h 05m 12.31s , +25d 37m 33.6s) |   C |    60 | 18.7 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12429
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) was pointed to the EP250416a ( EP Team et al., GCN 40154) errorbox  3581 sec after notice time and 37096 sec after trigger time at 2025-04-17 04:12:15 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 79 deg. The sun  altitude  is -68.8 deg. 

The galactic latitude b = 33 deg., longitude l = 47 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2845513

We obtain a following upper limits.  

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

   37127 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.87s , +25d 40m 55.7s) |   C |    60 | 16.5 |        
   37187 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.85s , +25d 40m 55.5s) |   C |   180 | 17.7 |  Coadd 
   37590 | 2025-04-17 04:19:58 |         MASTER-OAFA | (17h 05m 56.72s , +25d 41m 13.9s) |   C |    60 | 17.3 |        
   38093 | 2025-04-17 04:28:21 |         MASTER-OAFA | (17h 06m 00.04s , +25d 40m 57.5s) |   C |    60 | 17.5 |        
   38511 | 2025-04-17 04:35:20 |         MASTER-OAFA | (17h 05m 58.06s , +25d 40m 40.2s) |   C |    60 | 17.7 |        
   39442 | 2025-04-17 04:50:50 |         MASTER-OAFA | (17h 06m 00.53s , +25d 42m 42.8s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12428
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) was pointed to the EP250416a ( EP Team et al., GCN 40154) errorbox  3581 sec after notice time and 37096 sec after trigger time at 2025-04-17 04:12:15 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 79 deg. The sun  altitude  is -68.8 deg. 

The galactic latitude b = 33 deg., longitude l = 47 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2845513

We obtain a following upper limits.  

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

   37127 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.87s , +25d 40m 55.7s) |   C |    60 | 16.5 |        
   37187 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.85s , +25d 40m 55.5s) |   C |   180 | 17.7 |  Coadd 
   37590 | 2025-04-17 04:19:58 |         MASTER-OAFA | (17h 05m 56.72s , +25d 41m 13.9s) |   C |    60 | 17.3 |        
   38093 | 2025-04-17 04:28:21 |         MASTER-OAFA | (17h 06m 00.04s , +25d 40m 57.5s) |   C |    60 | 17.5 |        
   38511 | 2025-04-17 04:35:20 |         MASTER-OAFA | (17h 05m 58.06s , +25d 40m 40.2s) |   C |    60 | 17.7 |        
   39442 | 2025-04-17 04:50:50 |         MASTER-OAFA | (17h 06m 00.53s , +25d 42m 42.8s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 12427
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) was pointed to the EP250416a ( EP Team et al., GCN 40154) errorbox  3581 sec after notice time and 37096 sec after trigger time at 2025-04-17 04:12:15 UT, with upper limit up to  18.2 mag. The observations began at zenith distance = 79 deg. The sun  altitude  is -68.8 deg. 

The galactic latitude b = 33 deg., longitude l = 47 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2845513

We obtain a following upper limits.  

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

   37127 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.87s , +25d 40m 55.7s) |   C |    60 | 16.5 |        
   37187 | 2025-04-17 04:12:15 |         MASTER-OAFA | (17h 05m 52.85s , +25d 40m 55.5s) |   C |   180 | 17.7 |  Coadd 
   37590 | 2025-04-17 04:19:58 |         MASTER-OAFA | (17h 05m 56.72s , +25d 41m 13.9s) |   C |    60 | 17.3 |        
   38093 | 2025-04-17 04:28:21 |         MASTER-OAFA | (17h 06m 00.04s , +25d 40m 57.5s) |   C |    60 | 17.5 |        
   38511 | 2025-04-17 04:35:20 |         MASTER-OAFA | (17h 05m 58.06s , +25d 40m 40.2s) |   C |    60 | 17.7 |        
   39442 | 2025-04-17 04:50:50 |         MASTER-OAFA | (17h 06m 00.53s , +25d 42m 42.8s) |   C |    60 | 18.2 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025