MASTER Net MASTER Database: GRB240428.63 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 GRB240428.63
Trignum 736009379
Trigger time 2024-04-28 15:02:54.33
Notice time 2024-04-28 15:31:28.241753
Coord, eb (11h 52m 40.80s , +20d 25m 12.0s) , 5.28
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
2438479 2024-04-28 15:31:28.241753 11h 52m 40.80s +20d 25m 12.0s FERMI 5.28 alert 736009379 16 115 alert
2438451 2024-04-28 15:04:25.905607 11h 52m 36.00s +20d 24m 36.0s FERMI 5.95 alert 736009379 25 112 alert
2438441 2024-04-28 15:03:04.597632 11h 23m 07.92s +25d 06m 00.0s FERMI 14.72 alert 736009379 84 111 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory links
34.6 2024-04-28 15:02:53.91 10h 24m 42.00s +50d 19m 06.0s Amur Database Amur
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2024-04-28 15:02:54 (JD 2460429.127014)

Siderial time 8.028030 h

Ra 11:52:40.80 Dec 20:25:12.00
(178.170000d, 20.420000d)

Rise 2024-04-29 13:32:56

Transit 2024-04-29 21:49:20

Set 2024-04-29 06:09:40

Amur

Object: Altitude: 50.84 Azimuth: 52.08

Sun: Altitude: -25.15 Azimuth: 173.78

Moon: Altitude: -6.33 Azimuth: 308.24

Tunka

Object: Altitude: 58.04 Azimuth: 13.72

Sun: Altitude: -18.85 Azimuth: 148.98

Moon: Altitude: -20.36 Azimuth: 290.62

Kislovodsk

Object: Altitude: 40.55 Azimuth: 280.57

Sun: Altitude: 10.40 Azimuth: 99.94

Moon: Altitude: -60.05 Azimuth: 250.32

Tavrida

Object: Altitude: 34.38 Azimuth: 274.75

Sun: Altitude: 16.57 Azimuth: 93.95

Moon: Altitude: -65.10 Azimuth: 237.50

SAAO

Object: Altitude: 1.37 Azimuth: 244.63

Sun: Altitude: 10.39 Azimuth: 114.47

Moon: Altitude: -28.26 Azimuth: 349.39

IAC

Object: Altitude: -8.17 Azimuth: 241.47

Sun: Altitude: 58.72 Azimuth: 69.83

Moon: Altitude: -66.58 Azimuth: 83.01

Argentina

Object: Altitude: -72.19 Azimuth: 306.02

Sun: Altitude: 39.02 Azimuth: 208.66

Moon: Altitude: 6.64 Azimuth: 60.42

Mexico

Object: Altitude: -32.90 Azimuth: 150.99

Sun: Altitude: 29.72 Azimuth: 270.63

Moon: Altitude: 7.83 Azimuth: 49.79

Ural

Object: Altitude: 44.92 Azimuth: 309.22

Sun: Altitude: 3.45 Azimuth: 111.27

Moon: Altitude: -45.40 Azimuth: 251.73

Vostryakovo

Object: Altitude: 34.94 Azimuth: 285.24

Sun: Altitude: 14.85 Azimuth: 93.82

Moon: Altitude: -56.64 Azimuth: 227.83

Gal. latitude: 75.373411 Gal. longitude: 238.463283

Dist. to Sun: 129.040230

Dist. to Moon: 103.627937

Moon coord.: (272.975454 d, -28.530050 d)

Sun coord.: (36.094741 d, 14.333090 d)

Lunar disk: 0.792491

Lunar phase: 54.198244

Lunar bright limb: 92.457329

No SN in this field

2024-04-28 15:31:28 (JD 2460429.146852)

Siderial time 8.505445 h

Ra 11:52:40.80 Dec 20:25:12.00
(178.170000d, 20.420000d)

Rise 2024-04-29 13:32:56

Transit 2024-04-29 21:49:20

Set 2024-04-29 06:09:40

Amur

Object: Altitude: 47.03 Azimuth: 60.51

Sun: Altitude: -25.33 Azimuth: 181.43

Moon: Altitude: -3.01 Azimuth: 313.29

Tunka

Object: Altitude: 56.54 Azimuth: 25.84

Sun: Altitude: -20.88 Azimuth: 156.01

Moon: Altitude: -16.46 Azimuth: 295.46

Kislovodsk

Object: Altitude: 45.58 Azimuth: 286.66

Sun: Altitude: 5.37 Azimuth: 104.74

Moon: Altitude: -55.29 Azimuth: 257.25

Tavrida

Object: Altitude: 39.43 Azimuth: 280.29

Sun: Altitude: 11.53 Azimuth: 98.84

Moon: Altitude: -60.78 Azimuth: 246.80

SAAO

Object: Altitude: 6.74 Azimuth: 240.60

Sun: Altitude: 4.81 Azimuth: 110.34

Moon: Altitude: -26.86 Azimuth: 342.77

IAC

Object: Altitude: -2.53 Azimuth: 245.14

Sun: Altitude: 52.71 Azimuth: 75.94

Moon: Altitude: -72.59 Azimuth: 84.50

Argentina

Object: Altitude: -66.91 Azimuth: 294.06

Sun: Altitude: 41.53 Azimuth: 200.20

Moon: Altitude: 1.65 Azimuth: 57.02

Mexico

Object: Altitude: -35.52 Azimuth: 158.46

Sun: Altitude: 35.83 Azimuth: 274.49

Moon: Altitude: 3.22 Azimuth: 53.69

Ural

Object: Altitude: 47.74 Azimuth: 318.05

Sun: Altitude: -0.09 Azimuth: 117.22

Moon: Altitude: -41.79 Azimuth: 258.41

Vostryakovo

Object: Altitude: 38.79 Azimuth: 292.12

Sun: Altitude: 10.83 Azimuth: 99.60

Moon: Altitude: -53.55 Azimuth: 236.89

Gal. latitude: 75.373411 Gal. longitude: 238.463283

Dist. to Sun: 129.022533

Dist. to Moon: 103.878236

Moon coord.: (273.272036 d, -28.529458 d)

Sun coord.: (36.113585 d, 14.339287 d)

Lunar disk: 0.790784

Lunar phase: 54.439056

Lunar bright limb: 92.310044

No SN in this field

2024-04-28 16:31:28 (JD 2460429.188519)

Siderial time 9.508183 h

Ra 11:52:40.80 Dec 20:25:12.00
(178.170000d, 20.420000d)

Rise 2024-04-29 13:32:56

Transit 2024-04-29 21:49:20

Set 2024-04-29 06:09:40

Amur

Object: Altitude: 38.14 Azimuth: 75.43

Sun: Altitude: -23.76 Azimuth: 197.32

Moon: Altitude: 3.05 Azimuth: 324.41

Tunka

Object: Altitude: 50.94 Azimuth: 47.85

Sun: Altitude: -23.47 Azimuth: 171.46

Moon: Altitude: -8.79 Azimuth: 305.80

Kislovodsk

Object: Altitude: 55.46 Azimuth: 302.60

Sun: Altitude: -4.80 Azimuth: 115.13

Moon: Altitude: -44.96 Azimuth: 268.77

Tavrida

Object: Altitude: 49.63 Azimuth: 294.02

Sun: Altitude: 1.21 Azimuth: 109.15

Moon: Altitude: -50.94 Azimuth: 261.15

SAAO

Object: Altitude: 17.25 Azimuth: 230.99

Sun: Altitude: -7.35 Azimuth: 102.37

Moon: Altitude: -21.96 Azimuth: 329.94

IAC

Object: Altitude: 9.79 Azimuth: 251.99

Sun: Altitude: 39.69 Azimuth: 85.35

Moon: Altitude: -85.24 Azimuth: 85.99

Argentina

Object: Altitude: -54.65 Azimuth: 279.48

Sun: Altitude: 43.84 Azimuth: 180.64

Moon: Altitude: -8.14 Azimuth: 48.98

Mexico

Object: Altitude: -38.41 Azimuth: 175.75

Sun: Altitude: 48.52 Azimuth: 284.13

Moon: Altitude: -7.18 Azimuth: 60.92

Ural

Object: Altitude: 52.03 Azimuth: 338.98

Sun: Altitude: -6.86 Azimuth: 130.11

Moon: Altitude: -33.99 Azimuth: 271.08

Vostryakovo

Object: Altitude: 46.17 Azimuth: 308.46

Sun: Altitude: 2.65 Azimuth: 111.70

Moon: Altitude: -46.14 Azimuth: 252.89

Gal. latitude: 75.373411 Gal. longitude: 238.463283

Dist. to Sun: 128.985361

Dist. to Moon: 104.404165

Moon coord.: (273.895282 d, -28.526113 d)

Sun coord.: (36.153165 d, 14.352298 d)

Lunar disk: 0.787180

Lunar phase: 54.945150

Lunar bright limb: 92.000805

No SN in this field

2024-05-21 14:59:55 (JD 2460452.124942)

Siderial time 9.489498 h

Ra 11:52:40.80 Dec 20:25:12.00
(178.170000d, 20.420000d)

Rise 2024-05-22 12:02:30

Transit 2024-05-22 20:18:54

Set 2024-05-22 04:39:15

Amur

Object: Altitude: 38.31 Azimuth: 75.17

Sun: Altitude: -19.15 Azimuth: 173.70

Moon: Altitude: 21.84 Azimuth: 17.86

Tunka

Object: Altitude: 51.07 Azimuth: 47.49

Sun: Altitude: -13.03 Azimuth: 150.50

Moon: Altitude: 21.77 Azimuth: 352.57

Kislovodsk

Object: Altitude: 55.29 Azimuth: 302.25

Sun: Altitude: 14.80 Azimuth: 104.12

Moon: Altitude: 4.07 Azimuth: 296.98

Tavrida

Object: Altitude: 49.45 Azimuth: 293.72

Sun: Altitude: 20.96 Azimuth: 98.25

Moon: Altitude: -1.90 Azimuth: 291.01

SAAO

Object: Altitude: 17.07 Azimuth: 231.18

Sun: Altitude: 7.11 Azimuth: 119.55

Moon: Altitude: 9.02 Azimuth: 283.44

IAC

Object: Altitude: 9.56 Azimuth: 251.87

Sun: Altitude: 61.89 Azimuth: 80.12

Moon: Altitude: -39.63 Azimuth: 267.92

Argentina

Object: Altitude: -54.89 Azimuth: 279.68

Sun: Altitude: 33.37 Azimuth: 206.20

Moon: Altitude: -42.07 Azimuth: 359.45

Mexico

Object: Altitude: -38.40 Azimuth: 175.42

Sun: Altitude: 31.91 Azimuth: 264.13

Moon: Altitude: -50.16 Azimuth: 102.44

Ural

Object: Altitude: 51.97 Azimuth: 338.56

Sun: Altitude: 8.80 Azimuth: 114.00

Moon: Altitude: 5.62 Azimuth: 311.67

Vostryakovo

Object: Altitude: 46.04 Azimuth: 308.13

Sun: Altitude: 19.97 Azimuth: 97.10

Moon: Altitude: -3.67 Azimuth: 293.40

Gal. latitude: 75.373411 Gal. longitude: 238.463283

Dist. to Sun: 108.257700

Dist. to Moon: 51.397186

Moon coord.: (214.972655 d, -16.129933 d)

Sun coord.: (58.552753 d, 20.305205 d)

Lunar disk: 0.961229

Lunar phase: 22.712025

Lunar bright limb: 284.224940

No SN in this field
Recent coverage and limits telegrams

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

  ID = 10028
TYPE = 35
DAYS = 2


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 240428A ( Fermi GBM team, GCN 36338) errorbox  8392 sec after notice time and 8401 sec after trigger time at 2024-04-28 17:22:55 UT, with upper limit up to  19.6 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -17.4 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 240428A errorbox  32465 sec after notice time and 32473 sec after trigger time at 2024-04-29 00:04:08 UT, with upper limit up to  16.4 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -23.0 deg. 

The galactic latitude b = 75 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2438460

We obtain a following upper limits.  

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

    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 49m 40.27s , +20d 18m 15.1s) |   C |    60 | 18.5 |        
    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 51m 32.76s , +20d 05m 07.8s) |   C |    60 | 18.3 |        
    8723 | 2024-04-28 17:27:47 |         MASTER-SAAO | (11h 41m 04.10s , +18d 22m 24.3s) |   C |    60 | 18.7 |        
    8723 | 2024-04-28 17:27:47 |         MASTER-SAAO | (11h 42m 56.30s , +18d 09m 17.2s) |   C |    60 | 18.6 |        
    8803 | 2024-04-28 17:29:07 |         MASTER-SAAO | (11h 52m 14.41s , +24d 04m 33.9s) |   C |    60 | 18.0 |        
    8803 | 2024-04-28 17:29:07 |         MASTER-SAAO | (11h 54m 09.99s , +23d 51m 26.9s) |   C |    60 | 18.0 |        
    8882 | 2024-04-28 17:30:26 |         MASTER-SAAO | (11h 33m 02.71s , +20d 18m 10.3s) |   C |    60 | 18.8 |        
    8882 | 2024-04-28 17:30:26 |         MASTER-SAAO | (11h 34m 55.76s , +20d 05m 04.8s) |   C |    60 | 18.7 |        
    9122 | 2024-04-28 17:34:25 |         MASTER-SAAO | (11h 37m 19.28s , +23d 52m 22.2s) |   C |    60 | 18.3 |        
    9682 | 2024-04-28 17:43:46 |         MASTER-SAAO | (11h 49m 17.21s , +20d 18m 13.4s) |   C |    60 | 18.6 |        
    9683 | 2024-04-28 17:43:46 |         MASTER-SAAO | (11h 51m 10.77s , +20d 05m 06.4s) |   C |    60 | 18.6 |        
    9843 | 2024-04-28 17:46:27 |         MASTER-SAAO | (11h 40m 59.23s , +18d 24m 34.2s) |   C |    60 | 19.0 |        
    9843 | 2024-04-28 17:46:27 |         MASTER-SAAO | (11h 42m 51.76s , +18d 11m 27.7s) |   C |    60 | 18.8 |        
    9922 | 2024-04-28 17:47:46 |         MASTER-SAAO | (11h 52m 05.48s , +24d 05m 26.9s) |   C |    60 | 18.3 |        
    9922 | 2024-04-28 17:47:46 |         MASTER-SAAO | (11h 54m 01.74s , +23d 52m 20.3s) |   C |    60 | 18.1 |        
   10002 | 2024-04-28 17:49:06 |         MASTER-SAAO | (11h 33m 00.10s , +20d 16m 39.9s) |   C |    60 | 18.9 |        
   10002 | 2024-04-28 17:49:06 |         MASTER-SAAO | (11h 34m 53.72s , +20d 03m 34.2s) |   C |    60 | 18.9 |        
   10242 | 2024-04-28 17:53:05 |         MASTER-SAAO | (11h 37m 22.16s , +23d 52m 06.9s) |   C |    60 | 18.3 |        
   10807 | 2024-04-28 18:02:30 |         MASTER-SAAO | (11h 49m 13.93s , +20d 18m 15.6s) |   C |    60 | 18.8 |        
   10807 | 2024-04-28 18:02:30 |         MASTER-SAAO | (11h 51m 08.34s , +20d 05m 07.9s) |   C |    60 | 18.7 |        
   11605 | 2024-04-28 18:15:48 |         MASTER-SAAO | (11h 41m 03.58s , +18d 24m 32.7s) |   C |    60 | 19.0 |        
   11605 | 2024-04-28 18:15:48 |         MASTER-SAAO | (11h 42m 57.89s , +18d 11m 25.3s) |   C |    60 | 18.8 |        
   11685 | 2024-04-28 18:17:09 |         MASTER-SAAO | (11h 52m 01.44s , +24d 05m 51.1s) |   C |    60 | 18.1 |        
   11685 | 2024-04-28 18:17:09 |         MASTER-SAAO | (11h 53m 59.18s , +23d 52m 43.4s) |   C |    60 | 18.1 |        
   11764 | 2024-04-28 18:18:28 |         MASTER-SAAO | (11h 32m 58.98s , +20d 19m 05.3s) |   C |    60 | 18.8 |        
   11765 | 2024-04-28 18:18:28 |         MASTER-SAAO | (11h 34m 54.00s , +20d 05m 58.7s) |   C |    60 | 18.8 |        
   12004 | 2024-04-28 18:22:28 |         MASTER-SAAO | (11h 37m 26.14s , +23d 52m 10.9s) |   C |    60 | 18.1 |        
   22591 | 2024-04-28 21:18:55 |         MASTER-SAAO | (11h 42m 53.09s , +22d 17m 08.3s) |   C |    60 | 18.5 |        
   22591 | 2024-04-28 21:18:55 |         MASTER-SAAO | (11h 44m 53.18s , +22d 04m 11.8s) |   C |    60 | 18.5 |        
   23234 | 2024-04-28 21:29:38 |         MASTER-SAAO | (11h 59m 18.24s , +22d 17m 16.7s) |   C |    60 | 18.9 |        
   23234 | 2024-04-28 21:29:38 |         MASTER-SAAO | (12h 01m 18.40s , +22d 04m 19.5s) |   C |    60 | 18.8 |        
   23314 | 2024-04-28 21:30:58 |         MASTER-SAAO | (11h 57m 56.11s , +18d 27m 37.0s) |   C |    60 | 19.2 |        
   23314 | 2024-04-28 21:30:58 |         MASTER-SAAO | (11h 59m 53.55s , +18d 14m 39.7s) |   C |    60 | 19.0 |        
   23394 | 2024-04-28 21:32:18 |         MASTER-SAAO | (12h 06m 20.60s , +20d 22m 58.9s) |   C |    60 | 19.3 |        
   23394 | 2024-04-28 21:32:18 |         MASTER-SAAO | (12h 08m 19.34s , +20d 10m 00.8s) |   C |    60 | 19.2 |        
   23474 | 2024-04-28 21:33:37 |         MASTER-SAAO | (11h 50m 29.27s , +16d 34m 48.3s) |   C |    60 | 19.3 |        
   23474 | 2024-04-28 21:33:37 |         MASTER-SAAO | (11h 52m 25.57s , +16d 21m 50.2s) |   C |    60 | 19.1 |        
   23553 | 2024-04-28 21:34:57 |         MASTER-SAAO | (11h 42m 50.87s , +22d 18m 16.6s) |   C |    60 | 18.6 |        
   23553 | 2024-04-28 21:34:57 |         MASTER-SAAO | (11h 44m 50.85s , +22d 05m 18.0s) |   C |    60 | 18.5 |        
   23633 | 2024-04-28 21:36:17 |         MASTER-SAAO | (12h 06m 24.48s , +16d 34m 23.6s) |   C |    60 | 19.3 |        
   24193 | 2024-04-28 21:45:37 |         MASTER-SAAO | (11h 59m 15.13s , +22d 18m 09.9s) |   C |    60 | 19.0 |        
   24193 | 2024-04-28 21:45:37 |         MASTER-SAAO | (12h 01m 15.07s , +22d 05m 10.2s) |   C |    60 | 18.9 |        
   24273 | 2024-04-28 21:46:57 |         MASTER-SAAO | (11h 57m 59.17s , +18d 29m 08.7s) |   C |    60 | 19.1 |        
   24273 | 2024-04-28 21:46:57 |         MASTER-SAAO | (11h 59m 56.41s , +18d 16m 09.0s) |   C |    60 | 19.0 |        
   24353 | 2024-04-28 21:48:17 |         MASTER-SAAO | (12h 06m 16.64s , +20d 21m 57.4s) |   C |    60 | 19.3 |        
   24353 | 2024-04-28 21:48:17 |         MASTER-SAAO | (12h 08m 15.22s , +20d 08m 57.7s) |   C |    60 | 19.2 |        
   24433 | 2024-04-28 21:49:37 |         MASTER-SAAO | (11h 50m 33.93s , +16d 34m 53.5s) |   C |    60 | 19.1 |        
   24433 | 2024-04-28 21:49:37 |         MASTER-SAAO | (11h 52m 30.08s , +16d 21m 54.1s) |   C |    60 | 18.8 |        
   24513 | 2024-04-28 21:50:57 |         MASTER-SAAO | (11h 44m 52.67s , +22d 05m 45.2s) |   C |    60 | 18.4 |        
   24513 | 2024-04-28 21:50:57 |         MASTER-SAAO | (11h 42m 52.83s , +22d 18m 44.6s) |   C |    60 | 18.5 |        
   24594 | 2024-04-28 21:52:17 |         MASTER-SAAO | (12h 06m 22.97s , +16d 34m 02.9s) |   C |    60 | 19.3 |        
   25154 | 2024-04-28 22:01:38 |         MASTER-SAAO | (11h 59m 18.59s , +22d 18m 23.6s) |   C |    60 | 18.8 |        
   25154 | 2024-04-28 22:01:38 |         MASTER-SAAO | (12h 01m 18.53s , +22d 05m 23.2s) |   C |    60 | 18.7 |        
   25234 | 2024-04-28 22:02:58 |         MASTER-SAAO | (11h 57m 55.77s , +18d 29m 00.2s) |   C |    60 | 19.0 |        
   25234 | 2024-04-28 22:02:58 |         MASTER-SAAO | (11h 59m 52.97s , +18d 15m 60.0s) |   C |    60 | 18.9 |        
   25314 | 2024-04-28 22:04:18 |         MASTER-SAAO | (12h 06m 22.06s , +20d 24m 07.4s) |   C |    60 | 19.3 |        
   25314 | 2024-04-28 22:04:18 |         MASTER-SAAO | (12h 08m 20.61s , +20d 11m 07.2s) |   C |    60 | 19.2 |        
   25394 | 2024-04-28 22:05:38 |         MASTER-SAAO | (11h 50m 27.37s , +16d 36m 02.3s) |   C |    60 | 19.1 |        
   25394 | 2024-04-28 22:05:38 |         MASTER-SAAO | (11h 52m 23.43s , +16d 23m 02.4s) |   C |    60 | 19.0 |        
   25554 | 2024-04-28 22:08:18 |         MASTER-SAAO | (12h 06m 25.41s , +16d 35m 34.6s) |   C |    60 | 19.2 |        
   32504 | 2024-04-29 00:04:08 |      MASTER-Tavrida | (11h 41m 49.06s , +22d 47m 58.0s) |   C |    60 | 13.2 |        
   32577 | 2024-04-29 00:05:21 |      MASTER-Tavrida | (11h 58m 17.10s , +22d 47m 27.7s) |   C |    60 | 16.4 |        
   95327 | 2024-04-29 17:31:10 |         MASTER-SAAO | (11h 51m 14.61s , +20d 04m 17.6s) |   C |    60 | 18.9 |        
   95327 | 2024-04-29 17:31:10 |         MASTER-SAAO | (11h 49m 21.81s , +20d 17m 16.9s) |   C |    60 | 19.0 |        
   95620 | 2024-04-29 17:36:04 |         MASTER-SAAO | (11h 41m 02.64s , +18d 23m 29.7s) |   C |    60 | 19.4 |        
   95620 | 2024-04-29 17:36:04 |         MASTER-SAAO | (11h 42m 55.32s , +18d 10m 30.9s) |   C |    60 | 19.2 |        
   95779 | 2024-04-29 17:38:43 |         MASTER-SAAO | (11h 37m 27.18s , +23d 51m 38.4s) |   C |    60 | 18.7 |        
   96115 | 2024-04-29 17:44:19 |         MASTER-SAAO | (11h 53m 56.47s , +23d 52m 30.4s) |   C |    60 | 18.6 |        
   96115 | 2024-04-29 17:44:19 |         MASTER-SAAO | (11h 51m 59.43s , +24d 05m 27.9s) |   C |    60 | 18.9 |        
   96286 | 2024-04-29 17:47:10 |         MASTER-SAAO | (11h 51m 09.43s , +20d 04m 36.5s) |   C |    60 | 19.1 |        
   96286 | 2024-04-29 17:47:10 |         MASTER-SAAO | (11h 49m 14.81s , +20d 17m 34.3s) |   C |    60 | 19.3 |        
   96366 | 2024-04-29 17:48:30 |         MASTER-SAAO | (11h 34m 53.35s , +20d 03m 46.7s) |   C |    60 | 19.3 |        
   96366 | 2024-04-29 17:48:30 |         MASTER-SAAO | (11h 32m 58.56s , +20d 16m 43.0s) |   C |    60 | 19.5 |        
   96950 | 2024-04-29 17:58:14 |         MASTER-SAAO | (11h 41m 04.42s , +18d 23m 35.1s) |   C |    60 | 19.4 |        
   96950 | 2024-04-29 17:58:14 |         MASTER-SAAO | (11h 42m 59.01s , +18d 10m 37.6s) |   C |    60 | 19.2 |        
   97859 | 2024-04-29 18:13:23 |         MASTER-SAAO | (11h 37m 23.15s , +23d 53m 36.9s) |   C |    60 | 18.7 |        
   98459 | 2024-04-29 18:23:23 |         MASTER-SAAO | (11h 54m 05.27s , +23d 52m 09.8s) |   C |    60 | 19.0 |        
   98459 | 2024-04-29 18:23:23 |         MASTER-SAAO | (11h 52m 06.31s , +24d 05m 04.4s) |   C |    60 | 19.1 |        
   98631 | 2024-04-29 18:26:14 |         MASTER-SAAO | (11h 51m 09.55s , +20d 04m 09.7s) |   C |    60 | 19.2 |        
   98631 | 2024-04-29 18:26:14 |         MASTER-SAAO | (11h 49m 13.19s , +20d 17m 04.5s) |   C |    60 | 19.5 |        
   98711 | 2024-04-29 18:27:35 |         MASTER-SAAO | (11h 35m 00.25s , +20d 06m 19.8s) |   C |    60 | 19.5 |        
   98711 | 2024-04-29 18:27:35 |         MASTER-SAAO | (11h 33m 03.75s , +20d 19m 13.5s) |   C |    60 | 19.6 |        
   98791 | 2024-04-29 18:28:54 |         MASTER-SAAO | (11h 42m 53.78s , +18d 11m 16.9s) |   C |    60 | 19.4 |        
   98791 | 2024-04-29 18:28:54 |         MASTER-SAAO | (11h 40m 58.54s , +18d 24m 11.1s) |   C |    60 | 19.6 |        
   98950 | 2024-04-29 18:31:34 |         MASTER-SAAO | (11h 37m 27.51s , +23d 53m 26.9s) |   C |    60 | 18.8 |        
   99551 | 2024-04-29 18:41:35 |         MASTER-SAAO | (11h 51m 59.52s , +24d 07m 07.8s) |   C |    60 | 19.0 |        
   99551 | 2024-04-29 18:41:35 |         MASTER-SAAO | (11h 53m 59.71s , +23d 54m 11.4s) |   C |    60 | 18.9 |        
  101085 | 2024-04-29 19:07:09 |         MASTER-SAAO | (11h 33m 14.89s , +20d 19m 18.2s) |   C |    60 | 19.3 |        
  101085 | 2024-04-29 19:07:09 |         MASTER-SAAO | (11h 35m 13.24s , +20d 06m 29.2s) |   C |    60 | 19.1 |        
  109124 | 2024-04-29 21:21:08 |         MASTER-SAAO | (11h 44m 59.03s , +22d 04m 56.7s) |   C |    60 | 18.4 |        
  109124 | 2024-04-29 21:21:08 |         MASTER-SAAO | (11h 43m 00.70s , +22d 17m 33.5s) |   C |    60 | 18.4 |        
  109819 | 2024-04-29 21:32:43 |         MASTER-SAAO | (12h 01m 16.81s , +22d 02m 51.0s) |   C |    60 | 18.7 |        
  109819 | 2024-04-29 21:32:43 |         MASTER-SAAO | (11h 59m 18.39s , +22d 15m 25.4s) |   C |    60 | 18.8 |        
  109899 | 2024-04-29 21:34:03 |         MASTER-SAAO | (11h 58m 02.15s , +18d 27m 44.0s) |   C |    60 | 19.1 |        
  109899 | 2024-04-29 21:34:03 |         MASTER-SAAO | (11h 59m 57.92s , +18d 15m 08.4s) |   C |    60 | 19.0 |        
  109979 | 2024-04-29 21:35:22 |         MASTER-SAAO | (12h 08m 19.35s , +20d 10m 22.1s) |   C |    60 | 19.1 |        
  109979 | 2024-04-29 21:35:22 |         MASTER-SAAO | (12h 06m 22.21s , +20d 22m 58.2s) |   C |    60 | 19.3 |        
  110058 | 2024-04-29 21:36:42 |         MASTER-SAAO | (11h 44m 54.72s , +22d 03m 51.1s) |   C |    60 | 18.5 |        
  110058 | 2024-04-29 21:36:42 |         MASTER-SAAO | (11h 42m 56.42s , +22d 16m 26.9s) |   C |    60 | 18.5 |        
  110138 | 2024-04-29 21:38:02 |         MASTER-SAAO | (11h 52m 31.69s , +16d 22m 57.1s) |   C |    60 | 19.1 |        
  110138 | 2024-04-29 21:38:02 |         MASTER-SAAO | (11h 50m 36.93s , +16d 35m 34.2s) |   C |    60 | 19.3 |        
  110218 | 2024-04-29 21:39:22 |         MASTER-SAAO | (12h 06m 22.17s , +16d 34m 27.0s) |   C |    60 | 19.3 |        
  110739 | 2024-04-29 21:48:03 |         MASTER-SAAO | (12h 01m 20.46s , +22d 05m 08.9s) |   C |    60 | 18.8 |        
  110739 | 2024-04-29 21:48:03 |         MASTER-SAAO | (11h 59m 22.03s , +22d 17m 45.4s) |   C |    60 | 18.8 |        
  110819 | 2024-04-29 21:49:23 |         MASTER-SAAO | (11h 59m 55.17s , +18d 15m 56.2s) |   C |    60 | 19.0 |        
  110819 | 2024-04-29 21:49:23 |         MASTER-SAAO | (11h 57m 59.37s , +18d 28m 32.9s) |   C |    60 | 19.1 |        
  110899 | 2024-04-29 21:50:42 |         MASTER-SAAO | (12h 08m 21.76s , +20d 11m 04.1s) |   C |    60 | 19.1 |        
  110899 | 2024-04-29 21:50:42 |         MASTER-SAAO | (12h 06m 24.65s , +20d 23m 41.2s) |   C |    60 | 19.2 |        
  110978 | 2024-04-29 21:52:02 |         MASTER-SAAO | (11h 44m 51.65s , +22d 05m 15.1s) |   C |    60 | 18.3 |        
  110978 | 2024-04-29 21:52:02 |         MASTER-SAAO | (11h 42m 53.38s , +22d 17m 51.8s) |   C |    60 | 18.5 |        
  111058 | 2024-04-29 21:53:22 |         MASTER-SAAO | (11h 52m 25.82s , +16d 23m 53.9s) |   C |    60 | 18.8 |        
  111058 | 2024-04-29 21:53:22 |         MASTER-SAAO | (11h 50m 31.17s , +16d 36m 31.2s) |   C |    60 | 19.1 |        
  111137 | 2024-04-29 21:54:41 |         MASTER-SAAO | (12h 06m 29.67s , +16d 35m 00.5s) |   C |    60 | 19.2 |        
  111782 | 2024-04-29 22:05:26 |         MASTER-SAAO | (12h 01m 22.66s , +22d 05m 06.8s) |   C |    60 | 18.7 |        
  111782 | 2024-04-29 22:05:26 |         MASTER-SAAO | (11h 59m 24.39s , +22d 17m 47.7s) |   C |    60 | 18.8 |        
  111862 | 2024-04-29 22:06:46 |         MASTER-SAAO | (11h 59m 49.69s , +18d 16m 06.9s) |   C |    60 | 18.8 |        
  111862 | 2024-04-29 22:06:46 |         MASTER-SAAO | (11h 57m 54.10s , +18d 28m 47.9s) |   C |    60 | 19.0 |        
  111942 | 2024-04-29 22:08:06 |         MASTER-SAAO | (12h 08m 22.52s , +20d 10m 17.8s) |   C |    60 | 19.0 |        
  111942 | 2024-04-29 22:08:06 |         MASTER-SAAO | (12h 06m 25.65s , +20d 22m 58.8s) |   C |    60 | 19.0 |        
  112022 | 2024-04-29 22:09:25 |         MASTER-SAAO | (11h 52m 25.88s , +16d 23m 58.1s) |   C |    60 | 19.0 |        
  112022 | 2024-04-29 22:09:25 |         MASTER-SAAO | (11h 50m 31.58s , +16d 36m 39.2s) |   C |    60 | 19.1 |        
  112101 | 2024-04-29 22:10:45 |         MASTER-SAAO | (12h 06m 24.57s , +16d 34m 57.5s) |   C |    60 | 19.2 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 10027
TYPE = 35
DAYS = 1


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 240428A ( Fermi GBM team, GCN 36338) errorbox  8392 sec after notice time and 8401 sec after trigger time at 2024-04-28 17:22:55 UT, with upper limit up to  19.3 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -17.4 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) started inspect of the FERMI GRB 240428A errorbox  32465 sec after notice time and 32473 sec after trigger time at 2024-04-29 00:04:08 UT, with upper limit up to  16.4 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -23.0 deg. 

The galactic latitude b = 75 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2438460

We obtain a following upper limits.  

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

    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 49m 40.27s , +20d 18m 15.1s) |   C |    60 | 18.5 |        
    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 51m 32.76s , +20d 05m 07.8s) |   C |    60 | 18.3 |        
    8723 | 2024-04-28 17:27:47 |         MASTER-SAAO | (11h 41m 04.10s , +18d 22m 24.3s) |   C |    60 | 18.7 |        
    8723 | 2024-04-28 17:27:47 |         MASTER-SAAO | (11h 42m 56.30s , +18d 09m 17.2s) |   C |    60 | 18.6 |        
    8803 | 2024-04-28 17:29:07 |         MASTER-SAAO | (11h 52m 14.41s , +24d 04m 33.9s) |   C |    60 | 18.0 |        
    8803 | 2024-04-28 17:29:07 |         MASTER-SAAO | (11h 54m 09.99s , +23d 51m 26.9s) |   C |    60 | 18.0 |        
    8882 | 2024-04-28 17:30:26 |         MASTER-SAAO | (11h 33m 02.71s , +20d 18m 10.3s) |   C |    60 | 18.8 |        
    8882 | 2024-04-28 17:30:26 |         MASTER-SAAO | (11h 34m 55.76s , +20d 05m 04.8s) |   C |    60 | 18.7 |        
    9122 | 2024-04-28 17:34:25 |         MASTER-SAAO | (11h 37m 19.28s , +23d 52m 22.2s) |   C |    60 | 18.3 |        
    9682 | 2024-04-28 17:43:46 |         MASTER-SAAO | (11h 49m 17.21s , +20d 18m 13.4s) |   C |    60 | 18.6 |        
    9683 | 2024-04-28 17:43:46 |         MASTER-SAAO | (11h 51m 10.77s , +20d 05m 06.4s) |   C |    60 | 18.6 |        
    9843 | 2024-04-28 17:46:27 |         MASTER-SAAO | (11h 40m 59.23s , +18d 24m 34.2s) |   C |    60 | 19.0 |        
    9843 | 2024-04-28 17:46:27 |         MASTER-SAAO | (11h 42m 51.76s , +18d 11m 27.7s) |   C |    60 | 18.8 |        
    9922 | 2024-04-28 17:47:46 |         MASTER-SAAO | (11h 52m 05.48s , +24d 05m 26.9s) |   C |    60 | 18.3 |        
    9922 | 2024-04-28 17:47:46 |         MASTER-SAAO | (11h 54m 01.74s , +23d 52m 20.3s) |   C |    60 | 18.1 |        
   10002 | 2024-04-28 17:49:06 |         MASTER-SAAO | (11h 33m 00.10s , +20d 16m 39.9s) |   C |    60 | 18.9 |        
   10002 | 2024-04-28 17:49:06 |         MASTER-SAAO | (11h 34m 53.72s , +20d 03m 34.2s) |   C |    60 | 18.9 |        
   10242 | 2024-04-28 17:53:05 |         MASTER-SAAO | (11h 37m 22.16s , +23d 52m 06.9s) |   C |    60 | 18.3 |        
   10807 | 2024-04-28 18:02:30 |         MASTER-SAAO | (11h 49m 13.93s , +20d 18m 15.6s) |   C |    60 | 18.8 |        
   10807 | 2024-04-28 18:02:30 |         MASTER-SAAO | (11h 51m 08.34s , +20d 05m 07.9s) |   C |    60 | 18.7 |        
   11605 | 2024-04-28 18:15:48 |         MASTER-SAAO | (11h 41m 03.58s , +18d 24m 32.7s) |   C |    60 | 19.0 |        
   11605 | 2024-04-28 18:15:48 |         MASTER-SAAO | (11h 42m 57.89s , +18d 11m 25.3s) |   C |    60 | 18.8 |        
   11685 | 2024-04-28 18:17:09 |         MASTER-SAAO | (11h 52m 01.44s , +24d 05m 51.1s) |   C |    60 | 18.1 |        
   11685 | 2024-04-28 18:17:09 |         MASTER-SAAO | (11h 53m 59.18s , +23d 52m 43.4s) |   C |    60 | 18.1 |        
   11764 | 2024-04-28 18:18:28 |         MASTER-SAAO | (11h 32m 58.98s , +20d 19m 05.3s) |   C |    60 | 18.8 |        
   11765 | 2024-04-28 18:18:28 |         MASTER-SAAO | (11h 34m 54.00s , +20d 05m 58.7s) |   C |    60 | 18.8 |        
   12004 | 2024-04-28 18:22:28 |         MASTER-SAAO | (11h 37m 26.14s , +23d 52m 10.9s) |   C |    60 | 18.1 |        
   22591 | 2024-04-28 21:18:55 |         MASTER-SAAO | (11h 42m 53.09s , +22d 17m 08.3s) |   C |    60 | 18.5 |        
   22591 | 2024-04-28 21:18:55 |         MASTER-SAAO | (11h 44m 53.18s , +22d 04m 11.8s) |   C |    60 | 18.5 |        
   23234 | 2024-04-28 21:29:38 |         MASTER-SAAO | (11h 59m 18.24s , +22d 17m 16.7s) |   C |    60 | 18.9 |        
   23234 | 2024-04-28 21:29:38 |         MASTER-SAAO | (12h 01m 18.40s , +22d 04m 19.5s) |   C |    60 | 18.8 |        
   23314 | 2024-04-28 21:30:58 |         MASTER-SAAO | (11h 57m 56.11s , +18d 27m 37.0s) |   C |    60 | 19.2 |        
   23314 | 2024-04-28 21:30:58 |         MASTER-SAAO | (11h 59m 53.55s , +18d 14m 39.7s) |   C |    60 | 19.0 |        
   23394 | 2024-04-28 21:32:18 |         MASTER-SAAO | (12h 06m 20.60s , +20d 22m 58.9s) |   C |    60 | 19.3 |        
   23394 | 2024-04-28 21:32:18 |         MASTER-SAAO | (12h 08m 19.34s , +20d 10m 00.8s) |   C |    60 | 19.2 |        
   23474 | 2024-04-28 21:33:37 |         MASTER-SAAO | (11h 50m 29.27s , +16d 34m 48.3s) |   C |    60 | 19.3 |        
   23474 | 2024-04-28 21:33:37 |         MASTER-SAAO | (11h 52m 25.57s , +16d 21m 50.2s) |   C |    60 | 19.1 |        
   23553 | 2024-04-28 21:34:57 |         MASTER-SAAO | (11h 42m 50.87s , +22d 18m 16.6s) |   C |    60 | 18.6 |        
   23553 | 2024-04-28 21:34:57 |         MASTER-SAAO | (11h 44m 50.85s , +22d 05m 18.0s) |   C |    60 | 18.5 |        
   23633 | 2024-04-28 21:36:17 |         MASTER-SAAO | (12h 06m 24.48s , +16d 34m 23.6s) |   C |    60 | 19.3 |        
   24193 | 2024-04-28 21:45:37 |         MASTER-SAAO | (11h 59m 15.13s , +22d 18m 09.9s) |   C |    60 | 19.0 |        
   24193 | 2024-04-28 21:45:37 |         MASTER-SAAO | (12h 01m 15.07s , +22d 05m 10.2s) |   C |    60 | 18.9 |        
   24273 | 2024-04-28 21:46:57 |         MASTER-SAAO | (11h 57m 59.17s , +18d 29m 08.7s) |   C |    60 | 19.1 |        
   24273 | 2024-04-28 21:46:57 |         MASTER-SAAO | (11h 59m 56.41s , +18d 16m 09.0s) |   C |    60 | 19.0 |        
   24353 | 2024-04-28 21:48:17 |         MASTER-SAAO | (12h 06m 16.64s , +20d 21m 57.4s) |   C |    60 | 19.3 |        
   24353 | 2024-04-28 21:48:17 |         MASTER-SAAO | (12h 08m 15.22s , +20d 08m 57.7s) |   C |    60 | 19.2 |        
   24433 | 2024-04-28 21:49:37 |         MASTER-SAAO | (11h 50m 33.93s , +16d 34m 53.5s) |   C |    60 | 19.1 |        
   24433 | 2024-04-28 21:49:37 |         MASTER-SAAO | (11h 52m 30.08s , +16d 21m 54.1s) |   C |    60 | 18.8 |        
   24513 | 2024-04-28 21:50:57 |         MASTER-SAAO | (11h 44m 52.67s , +22d 05m 45.2s) |   C |    60 | 18.4 |        
   24513 | 2024-04-28 21:50:57 |         MASTER-SAAO | (11h 42m 52.83s , +22d 18m 44.6s) |   C |    60 | 18.5 |        
   24594 | 2024-04-28 21:52:17 |         MASTER-SAAO | (12h 06m 22.97s , +16d 34m 02.9s) |   C |    60 | 19.3 |        
   25154 | 2024-04-28 22:01:38 |         MASTER-SAAO | (11h 59m 18.59s , +22d 18m 23.6s) |   C |    60 | 18.8 |        
   25154 | 2024-04-28 22:01:38 |         MASTER-SAAO | (12h 01m 18.53s , +22d 05m 23.2s) |   C |    60 | 18.7 |        
   25234 | 2024-04-28 22:02:58 |         MASTER-SAAO | (11h 57m 55.77s , +18d 29m 00.2s) |   C |    60 | 19.0 |        
   25234 | 2024-04-28 22:02:58 |         MASTER-SAAO | (11h 59m 52.97s , +18d 15m 60.0s) |   C |    60 | 18.9 |        
   25314 | 2024-04-28 22:04:18 |         MASTER-SAAO | (12h 06m 22.06s , +20d 24m 07.4s) |   C |    60 | 19.3 |        
   25314 | 2024-04-28 22:04:18 |         MASTER-SAAO | (12h 08m 20.61s , +20d 11m 07.2s) |   C |    60 | 19.2 |        
   25394 | 2024-04-28 22:05:38 |         MASTER-SAAO | (11h 50m 27.37s , +16d 36m 02.3s) |   C |    60 | 19.1 |        
   25394 | 2024-04-28 22:05:38 |         MASTER-SAAO | (11h 52m 23.43s , +16d 23m 02.4s) |   C |    60 | 19.0 |        
   25554 | 2024-04-28 22:08:18 |         MASTER-SAAO | (12h 06m 25.41s , +16d 35m 34.6s) |   C |    60 | 19.2 |        
   32504 | 2024-04-29 00:04:08 |      MASTER-Tavrida | (11h 41m 49.06s , +22d 47m 58.0s) |   C |    60 | 13.2 |        
   32577 | 2024-04-29 00:05:21 |      MASTER-Tavrida | (11h 58m 17.10s , +22d 47m 27.7s) |   C |    60 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 10026
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 240428A ( Fermi GBM team, GCN 36338) errorbox  8392 sec after notice time and 8401 sec after trigger time at 2024-04-28 17:22:55 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -17.4 deg. 

The galactic latitude b = 75 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2438479

We obtain a following upper limits.  

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

    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 49m 40.27s , +20d 18m 15.1s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 10025
TYPE = 35
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 240428A ( Fermi GBM team, GCN 36338) errorbox  8392 sec after notice time and 8401 sec after trigger time at 2024-04-28 17:22:55 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -17.4 deg. 

The galactic latitude b = 75 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2438479

We obtain a following upper limits.  

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

    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 49m 40.27s , +20d 18m 15.1s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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



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  ID = 10024
TYPE = 34
DAYS = 0


MASTER-SAAO robotic telescope  (Global MASTER-Net: http://observ.pereplet.ru, Lipunov et al., 2010, Advances in Astronomy, vol. 2010, 30L)  located in South Africa (South African Astronomical Observatory) started inspect of the FERMI GRB 240428A ( Fermi GBM team, GCN 36338) errorbox  8392 sec after notice time and 8401 sec after trigger time at 2024-04-28 17:22:55 UT, with upper limit up to  18.5 mag. The observations began at zenith distance = 65 deg. The sun  altitude  is -17.4 deg. 

The galactic latitude b = 75 deg., longitude l = 238 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2438479

We obtain a following upper limits.  

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

    8431 | 2024-04-28 17:22:55 |         MASTER-SAAO | (11h 49m 40.27s , +20d 18m 15.1s) |   C |    60 | 18.5 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2024