MASTER Net MASTER Database: GRB240809.35 page

Please use the reference to MASTER DataBase as Lipunov et al., 2010, MASTER Robotic Net, Advances in Astronomy, vol. 2010, p.30L

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

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

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

Search:

show search form
GRB coord: ErrorBox (deg): Sys Error (deg):
Sattel : Trigger: Notice:
GRB_Name: trignum: Nights after: FullSky


Name SWIFT GRB240809.35
Trignum 1247745
Trigger time 2024-08-09 08:30:29.59
Notice time 2024-08-09 08:30:45.079285
Coord, eb (15h 50m 12.24s , -02d 19m 15.6s) , 0.05
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

MASTER observatories and transients from them in error-field
Kislovodsk Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Amur Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tunka Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAFA Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
IAC Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
SAAO Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
Tavrida Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)
OAGH Transients (Undef)
(All)
(Yes)
Trans. Difference (Undef)
(All)
(Yes)
(Gal)

You are viewing outdated information, relevant error box is here

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2556149 2024-08-09 08:45:46.660308 15h 50m 11.14s -02d 19m 04.1s ANTARES 0.00333333 1247745
2564502 2024-08-15 10:49:31.364751 15h 50m 04.54s -02d 19m 11.6s SWIFT 0 pointdir 1247745 1163 83 pointdir
2556147 2024-08-09 08:37:24.441781 15h 50m 10.56s -02d 19m 01.2s SWIFT 0.000111111 alert 1247745 1 81 alert
2556139 2024-08-09 08:32:36.224853 15h 50m 11.04s -02d 19m 04.8s SWIFT 0 alert 1247745 1 78 alert
2556133 2024-08-09 08:32:35.382968 15h 50m 11.04s -02d 19m 04.8s SWIFT 0.00130556 alert 1247745 1 69 alert
2556150 2024-08-09 08:51:02.565701 15h 50m 11.28s -02d 19m 03.4s SWIFT 0 alert 1247745 2 68 alert
2556126 2024-08-09 08:32:25.609199 15h 50m 11.04s -02d 19m 04.8s SWIFT 0.00130556 alert 1247745 1 67 alert
2556117 2024-08-09 08:30:45.079285 15h 50m 12.24s -02d 19m 15.6s SWIFT 0.05 alert 1247745 1 61 alert

DAYS:

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

Synchronous WFC images
Distance datetime coord2000 observatory camera links
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2024-08-09 08:30:29 (JD 2460531.854502)

Siderial time 8.237958 h

Ra 15:50:12.24 Dec -2:19:15.60
(237.551000d, -2.321000d)

Rise 2024-08-09 13:15:44

Transit 2024-08-09 19:05:09

Set 2024-08-10 00:54:35

Amur

Object: Altitude: 33.45 Azimuth: 330.71

Sun: Altitude: 22.20 Azimuth: 88.16

Moon: Altitude: 31.43 Azimuth: 27.78

Tunka

Object: Altitude: 22.16 Azimuth: 306.05

Sun: Altitude: 36.79 Azimuth: 66.32

Moon: Altitude: 33.56 Azimuth: 358.92

Kislovodsk

Object: Altitude: -15.30 Azimuth: 258.24

Sun: Altitude: 60.53 Azimuth: 338.31

Moon: Altitude: 16.76 Azimuth: 293.88

Tavrida

Object: Altitude: -20.93 Azimuth: 251.47

Sun: Altitude: 56.74 Azimuth: 324.36

Moon: Altitude: 10.72 Azimuth: 287.64

SAAO

Object: Altitude: -31.98 Azimuth: 296.90

Sun: Altitude: 32.62 Azimuth: 218.00

Moon: Altitude: 8.25 Azimuth: 270.26

IAC

Object: Altitude: -61.65 Azimuth: 205.69

Sun: Altitude: 24.82 Azimuth: 264.77

Moon: Altitude: -28.91 Azimuth: 258.89

Argentina

Object: Altitude: -38.33 Azimuth: 56.56

Sun: Altitude: -35.84 Azimuth: 273.06

Moon: Altitude: -53.02 Azimuth: 348.85

Mexico

Object: Altitude: -8.06 Azimuth: 92.15

Sun: Altitude: -40.65 Azimuth: 200.73

Moon: Altitude: -48.29 Azimuth: 122.28

Ural

Object: Altitude: -3.07 Azimuth: 269.54

Sun: Altitude: 48.48 Azimuth: 8.91

Moon: Altitude: 18.64 Azimuth: 312.58

Vostryakovo

Object: Altitude: -15.21 Azimuth: 251.34

Sun: Altitude: 48.61 Azimuth: 336.95

Moon: Altitude: 9.35 Azimuth: 292.48

Gal. latitude: 37.252170 Gal. longitude: 6.159953

Dist. to Sun: 98.506046

Dist. to Moon: 47.588544

Moon coord.: (189.922150 d, -4.626722 d)

Sun coord.: (139.365477 d, 15.771932 d)

Lunar disk: 0.207102

Lunar phase: 125.859228

Lunar bright limb: 293.312977

No SN in this field

2024-08-09 08:30:45 (JD 2460531.854687)

Siderial time 8.242415 h

Ra 15:50:12.24 Dec -2:19:15.60
(237.551000d, -2.321000d)

Rise 2024-08-09 13:15:44

Transit 2024-08-09 19:05:09

Set 2024-08-10 00:54:35

Amur

Object: Altitude: 33.47 Azimuth: 330.78

Sun: Altitude: 22.16 Azimuth: 88.21

Moon: Altitude: 31.41 Azimuth: 27.85

Tunka

Object: Altitude: 22.20 Azimuth: 306.12

Sun: Altitude: 36.75 Azimuth: 66.39

Moon: Altitude: 33.56 Azimuth: 359.00

Kislovodsk

Object: Altitude: -15.26 Azimuth: 258.29

Sun: Altitude: 60.55 Azimuth: 338.43

Moon: Altitude: 16.80 Azimuth: 293.94

Tavrida

Object: Altitude: -20.88 Azimuth: 251.52

Sun: Altitude: 56.76 Azimuth: 324.46

Moon: Altitude: 10.76 Azimuth: 287.69

SAAO

Object: Altitude: -31.93 Azimuth: 296.85

Sun: Altitude: 32.66 Azimuth: 217.94

Moon: Altitude: 8.30 Azimuth: 270.23

IAC

Object: Altitude: -61.63 Azimuth: 205.82

Sun: Altitude: 24.88 Azimuth: 264.80

Moon: Altitude: -28.85 Azimuth: 258.93

Argentina

Object: Altitude: -38.38 Azimuth: 56.50

Sun: Altitude: -35.79 Azimuth: 273.02

Moon: Altitude: -53.00 Azimuth: 348.74

Mexico

Object: Altitude: -8.12 Azimuth: 92.19

Sun: Altitude: -40.63 Azimuth: 200.81

Moon: Altitude: -48.34 Azimuth: 122.35

Ural

Object: Altitude: -3.03 Azimuth: 269.59

Sun: Altitude: 48.47 Azimuth: 9.01

Moon: Altitude: 18.66 Azimuth: 312.64

Vostryakovo

Object: Altitude: -15.17 Azimuth: 251.40

Sun: Altitude: 48.63 Azimuth: 337.04

Moon: Altitude: 9.38 Azimuth: 292.54

Gal. latitude: 37.252170 Gal. longitude: 6.159953

Dist. to Sun: 98.505876

Dist. to Moon: 47.586635

Moon coord.: (189.924085 d, -4.627756 d)

Sun coord.: (139.365653 d, 15.771879 d)

Lunar disk: 0.207116

Lunar phase: 125.857221

Lunar bright limb: 293.312959

No SN in this field

2024-08-09 09:30:45 (JD 2460531.896354)

Siderial time 9.245153 h

Ra 15:50:12.24 Dec -2:19:15.60
(237.551000d, -2.321000d)

Rise 2024-08-09 13:15:44

Transit 2024-08-09 19:05:09

Set 2024-08-10 00:54:35

Amur

Object: Altitude: 36.80 Azimuth: 348.73

Sun: Altitude: 12.61 Azimuth: 99.57

Moon: Altitude: 25.78 Azimuth: 43.16

Tunka

Object: Altitude: 28.93 Azimuth: 321.03

Sun: Altitude: 27.88 Azimuth: 79.90

Moon: Altitude: 32.12 Azimuth: 16.26

Kislovodsk

Object: Altitude: -4.47 Azimuth: 268.93

Sun: Altitude: 61.79 Azimuth: 8.53

Moon: Altitude: 25.75 Azimuth: 306.28

Tavrida

Object: Altitude: -10.48 Azimuth: 262.81

Sun: Altitude: 60.80 Azimuth: 351.44

Moon: Altitude: 20.09 Azimuth: 299.30

SAAO

Object: Altitude: -20.12 Azimuth: 286.46

Sun: Altitude: 39.02 Azimuth: 201.91

Moon: Altitude: 20.73 Azimuth: 262.37

IAC

Object: Altitude: -53.43 Azimuth: 229.57

Sun: Altitude: 38.06 Azimuth: 271.71

Moon: Altitude: -16.21 Azimuth: 266.77

Argentina

Object: Altitude: -47.99 Azimuth: 40.56

Sun: Altitude: -23.04 Azimuth: 265.21

Moon: Altitude: -48.07 Azimuth: 327.09

Mexico

Object: Altitude: -20.92 Azimuth: 100.34

Sun: Altitude: -34.38 Azimuth: 217.25

Moon: Altitude: -57.93 Azimuth: 140.79

Ural

Object: Altitude: 5.09 Azimuth: 282.25

Sun: Altitude: 45.73 Azimuth: 29.90

Moon: Altitude: 23.55 Azimuth: 327.35

Vostryakovo

Object: Altitude: -6.84 Azimuth: 264.15

Sun: Altitude: 50.38 Azimuth: 359.19

Moon: Altitude: 16.42 Azimuth: 305.62

Gal. latitude: 37.252170 Gal. longitude: 6.159953

Dist. to Sun: 98.467787

Dist. to Moon: 47.157603

Moon coord.: (190.359630 d, -4.860394 d)

Sun coord.: (139.405226 d, 15.759811 d)

Lunar disk: 0.210319

Lunar phase: 125.405631

Lunar bright limb: 293.307605

No SN in this field

2024-11-08 18:49:10 (JD 2460623.284144)

Siderial time 0.557173 h

Ra 15:50:12.24 Dec -2:19:15.60
(237.551000d, -2.321000d)

Rise 2024-11-09 07:14:00

Transit 2024-11-09 13:03:26

Set 2024-11-09 18:52:52

Amur

Object: Altitude: -31.00 Azimuth: 229.44

Sun: Altitude: -35.45 Azimuth: 252.35

Moon: Altitude: -49.71 Azimuth: 121.97

Tunka

Object: Altitude: -38.68 Azimuth: 200.99

Sun: Altitude: -47.80 Azimuth: 225.02

Moon: Altitude: -34.89 Azimuth: 99.20

Kislovodsk

Object: Altitude: -33.00 Azimuth: 123.70

Sun: Altitude: -52.54 Azimuth: 126.31

Moon: Altitude: 5.30 Azimuth: 53.06

Tavrida

Object: Altitude: -27.24 Azimuth: 116.48

Sun: Altitude: -46.85 Azimuth: 117.55

Moon: Altitude: 9.32 Azimuth: 46.52

SAAO

Object: Altitude: -18.75 Azimuth: 74.58

Sun: Altitude: -19.73 Azimuth: 53.80

Moon: Altitude: 55.38 Azimuth: 98.66

IAC

Object: Altitude: 10.57 Azimuth: 81.53

Sun: Altitude: -8.02 Azimuth: 75.21

Moon: Altitude: 40.08 Azimuth: 359.81

Argentina

Object: Altitude: 52.93 Azimuth: 137.89

Sun: Altitude: 53.02 Azimuth: 105.00

Moon: Altitude: 42.06 Azimuth: 271.40

Mexico

Object: Altitude: 52.83 Azimuth: 330.73

Sun: Altitude: 42.03 Azimuth: 355.23

Moon: Altitude: -14.24 Azimuth: 286.91

Ural

Object: Altitude: -31.15 Azimuth: 147.66

Sun: Altitude: -48.43 Azimuth: 159.91

Moon: Altitude: -10.71 Azimuth: 66.58

Vostryakovo

Object: Altitude: -23.94 Azimuth: 124.40

Sun: Altitude: -42.87 Azimuth: 130.65

Moon: Altitude: 0.34 Azimuth: 48.91

Gal. latitude: 37.252170 Gal. longitude: 6.159953

Dist. to Sun: 19.628390

Dist. to Moon: 76.909767

Moon coord.: (314.385668 d, -21.620894 d)

Sun coord.: (224.051393 d, -16.781201 d)

Lunar disk: 0.450684

Lunar phase: 95.660370

Lunar bright limb: 254.196108

No SN in this field

Recent coverage and limits telegrams

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

  ID = 11055
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) was pointed to the SWIFT GRB 240809A ( P. A. Evans et al., GCN 37110) errorbox  32075 sec after notice time and 32089 sec after trigger time at 2024-08-09 17:25:19 UT, with upper limit up to  19.2 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -16.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the SWIFT GRB 240809A errorbox  33847 sec after notice time and 33861 sec after trigger time at 2024-08-09 17:54:50 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 51 deg. The sun  altitude  is -10.2 deg. 

The galactic latitude b = 37 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2556110

We obtain a following upper limits.  

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

   32180 |         MASTER-SAAO |   C |   180 | 16.4 |        
   33951 |      MASTER-Tavrida |   C |   180 | 16.3 |        
   33951 |      MASTER-Tavrida |   C |   180 | 16.8 |        
   34143 |      MASTER-Tavrida |   C |   180 | 16.8 |        
   34143 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34342 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34342 |      MASTER-Tavrida |   C |   180 | 17.5 |        
   34561 |      MASTER-Tavrida |   C |   180 | 17.0 |        
   34562 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34754 |      MASTER-Tavrida |   C |   180 | 17.6 |        
   34754 |      MASTER-Tavrida |   C |   180 | 17.7 |        
   34945 |      MASTER-Tavrida |   C |   180 | 18.0 |        
   34946 |      MASTER-Tavrida |   C |   180 | 18.3 |        
   35138 |      MASTER-Tavrida |   C |   180 | 18.3 |        
   35138 |      MASTER-Tavrida |   C |   180 | 18.5 |        
   35908 |      MASTER-Tavrida |   C |    60 | 18.1 |        
   35908 |      MASTER-Tavrida |   C |    60 | 18.2 |        
   35982 |      MASTER-Tavrida |   C |    60 | 18.1 |        
   35982 |      MASTER-Tavrida |   C |    60 | 18.3 |        
   36358 |      MASTER-Tavrida |   C |   180 | 18.8 |        
   36358 |      MASTER-Tavrida |   C |   180 | 18.9 |        
   36657 |      MASTER-Tavrida |   C |    60 | 18.3 |        
   36657 |      MASTER-Tavrida |   C |    60 | 18.0 |        
   37635 |      MASTER-Tavrida |   C |   180 | 19.0 |        
   37636 |      MASTER-Tavrida |   C |   180 | 18.7 |        
   37767 |      MASTER-Tavrida |   C |    60 | 18.4 |        
   37767 |      MASTER-Tavrida |   C |    60 | 18.4 |        
   41971 |         MASTER-SAAO |   C |   180 | 15.9 |        
   44575 |         MASTER-SAAO |   C |   180 | 18.6 |        
   44779 |         MASTER-SAAO |   C |   180 | 18.8 |        
   44959 |         MASTER-SAAO |   C |   540 | 19.2 |  Coadd 
   45437 |         MASTER-SAAO |   C |   180 | 18.3 |        
   45637 |         MASTER-SAAO |   C |   180 | 17.8 |        
   45836 |         MASTER-SAAO |   C |   180 | 18.7 |        
   46035 |         MASTER-SAAO |   C |   180 | 17.3 |        
   46234 |         MASTER-SAAO |   C |   180 | 15.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 11052
TYPE = 35
DAYS = 0.5


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) was pointed to the SWIFT GRB 240809A ( P. A. Evans et al., GCN 37110) errorbox  32075 sec after notice time and 32089 sec after trigger time at 2024-08-09 17:25:19 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -16.8 deg. 

MASTER-Tavrida robotic telescope  located in Russia (Lomonosov MSU, SAI Crimea astronomical station) was pointed to the SWIFT GRB 240809A errorbox  33847 sec after notice time and 33861 sec after trigger time at 2024-08-09 17:54:50 UT, with upper limit up to  19.0 mag. Observations started at twilight.  The observations began at zenith distance = 51 deg. The sun  altitude  is -10.2 deg. 

The galactic latitude b = 37 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2556110

We obtain a following upper limits.  

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

   32180 |         MASTER-SAAO |   C |   180 | 16.4 |        
   33951 |      MASTER-Tavrida |   C |   180 | 16.3 |        
   33951 |      MASTER-Tavrida |   C |   180 | 16.8 |        
   34143 |      MASTER-Tavrida |   C |   180 | 16.8 |        
   34143 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34342 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34342 |      MASTER-Tavrida |   C |   180 | 17.5 |        
   34561 |      MASTER-Tavrida |   C |   180 | 17.0 |        
   34562 |      MASTER-Tavrida |   C |   180 | 17.1 |        
   34754 |      MASTER-Tavrida |   C |   180 | 17.6 |        
   34754 |      MASTER-Tavrida |   C |   180 | 17.7 |        
   34945 |      MASTER-Tavrida |   C |   180 | 18.0 |        
   34946 |      MASTER-Tavrida |   C |   180 | 18.3 |        
   35138 |      MASTER-Tavrida |   C |   180 | 18.3 |        
   35138 |      MASTER-Tavrida |   C |   180 | 18.5 |        
   35908 |      MASTER-Tavrida |   C |    60 | 18.1 |        
   35908 |      MASTER-Tavrida |   C |    60 | 18.2 |        
   35982 |      MASTER-Tavrida |   C |    60 | 18.1 |        
   35982 |      MASTER-Tavrida |   C |    60 | 18.3 |        
   36358 |      MASTER-Tavrida |   C |   180 | 18.8 |        
   36358 |      MASTER-Tavrida |   C |   180 | 18.9 |        
   36657 |      MASTER-Tavrida |   C |    60 | 18.3 |        
   36657 |      MASTER-Tavrida |   C |    60 | 18.0 |        
   37635 |      MASTER-Tavrida |   C |   180 | 19.0 |        
   37636 |      MASTER-Tavrida |   C |   180 | 18.7 |        
   37767 |      MASTER-Tavrida |   C |    60 | 18.4 |        
   37767 |      MASTER-Tavrida |   C |    60 | 18.4 |        
   41971 |         MASTER-SAAO |   C |   180 | 15.9 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 11051
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) was pointed to the SWIFT GRB 240809A ( P. A. Evans et al., GCN 37110) errorbox  32075 sec after notice time and 32089 sec after trigger time at 2024-08-09 17:25:19 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -16.8 deg. 

The galactic latitude b = 37 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2556110

We obtain a following upper limits.  

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

   32180 |         MASTER-SAAO |   C |   180 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 11050
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) was pointed to the SWIFT GRB 240809A ( P. A. Evans et al., GCN 37110) errorbox  32075 sec after notice time and 32089 sec after trigger time at 2024-08-09 17:25:19 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -16.8 deg. 

The galactic latitude b = 37 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2556110

We obtain a following upper limits.  

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

   32180 |         MASTER-SAAO |   C |   180 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 11049
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) was pointed to the SWIFT GRB 240809A ( P. A. Evans et al., GCN 37110) errorbox  32075 sec after notice time and 32089 sec after trigger time at 2024-08-09 17:25:19 UT, with upper limit up to  16.4 mag. Observations started at twilight.  The observations began at zenith distance = 30 deg. The sun  altitude  is -16.8 deg. 

The galactic latitude b = 37 deg., longitude l =  6 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=2556110

We obtain a following upper limits.  

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

   32180 |         MASTER-SAAO |   C |   180 | 16.4 |        
Filter C is a clear (unfiltred) band. 


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



 

MASTER, 2002-2024