MASTER Net MASTER Database: GRB210517.23 page

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

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


Name SWIFT GRB210517.23
Trignum 1048783
Trigger time 2021-05-17 05:28:01.57
Notice time 2021-05-17 05:33:55.589809
Coord, eb (23h 52m 41.76s , -39d 06m 18.0s) , 0.05
Max dist: 1 sigma 3 sigma
AGN candidates: Milliquas
r90wise
wiseXgaia
BL Lac candidates: 1 Sigma
3 Sigma

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

All alerts for this trigger
id noticetime coord2000 satel errorbox type trigger seq trig_type links
2382961 2024-02-21 00:04:21.825442 23h 52m 41.76s -39d 06m 18.0s SWIFT 0.05 retraction 1048783 1 4044 retraction
1614671 2021-05-17 06:00:24.85082 23h 52m 54.00s -39d 06m 07.2s SWIFT 0.000611111 alert 1048783 2 67 alert
1614662 2021-05-17 05:34:10.89267 23h 52m 41.76s -39d 06m 18.0s SWIFT 0.05 alert 1048783 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
111.4 2021-05-17 05:26:31.471 02h 40m 10.00s +67d 42m 00.0s IAC 100627 Database IAC
109.5 2021-05-17 05:25:02.987 02h 00m 10.00s +67d 41m 09.0s IAC 111343 Database IAC
Errorbox center visibility at MASTER facilities
trigger notice notice+1hr now

2021-05-17 05:28:01 (JD 2459351.727789)

Siderial time 23.650927 h

Ra 23:52:41.76 Dec -39:06:18.00
(358.174000d, -39.105000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -27.05 Azimuth: 60.42

Sun: Altitude: 50.60 Azimuth: 49.37

Moon: Altitude: 53.30 Azimuth: 301.56

Tunka

Object: Altitude: -15.71 Azimuth: 45.40

Sun: Altitude: 57.14 Azimuth: 10.96

Moon: Altitude: 38.43 Azimuth: 278.46

Kislovodsk

Object: Altitude: 7.14 Azimuth: 1.17

Sun: Altitude: 38.82 Azimuth: 280.51

Moon: Altitude: -1.73 Azimuth: 232.64

Tavrida

Object: Altitude: 5.93 Azimuth: 354.54

Sun: Altitude: 32.65 Azimuth: 274.69

Moon: Altitude: -5.73 Azimuth: 226.40

SAAO

Object: Altitude: 72.32 Azimuth: 298.02

Sun: Altitude: 0.91 Azimuth: 246.30

Moon: Altitude: -54.87 Azimuth: 272.44

IAC

Object: Altitude: 3.88 Azimuth: 318.99

Sun: Altitude: -9.89 Azimuth: 241.62

Moon: Altitude: -37.01 Azimuth: 182.19

Argentina

Object: Altitude: 5.91 Azimuth: 312.99

Sun: Altitude: -72.35 Azimuth: 311.68

Moon: Altitude: -45.00 Azimuth: 94.26

Mexico

Object: Altitude: -65.38 Azimuth: 296.96

Sun: Altitude: -33.27 Azimuth: 148.97

Moon: Altitude: 13.99 Azimuth: 110.61

Ural

Object: Altitude: -7.40 Azimuth: 14.39

Sun: Altitude: 43.34 Azimuth: 308.25

Moon: Altitude: 14.30 Azimuth: 246.53

Vostryakovo

Object: Altitude: -4.53 Azimuth: 357.49

Sun: Altitude: 33.27 Azimuth: 284.71

Moon: Altitude: 3.24 Azimuth: 229.18

Gal. latitude: -73.439453 Gal. longitude: 344.463062

Dist. to Sun: 78.264710

Dist. to Moon: 128.427021

Moon coord.: (118.712411 d, 24.662331 d)

Sun coord.: (53.933652 d, 19.317481 d)

Lunar disk: 0.249254

Lunar phase: 120.098694

Lunar bright limb: 278.909289

No SN in this field

2021-05-17 05:33:55 (JD 2459351.731887)

Siderial time 23.749530 h

Ra 23:52:41.76 Dec -39:06:18.00
(358.174000d, -39.105000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -27.88 Azimuth: 61.32

Sun: Altitude: 49.88 Azimuth: 51.23

Moon: Altitude: 54.06 Azimuth: 303.33

Tunka

Object: Altitude: -16.37 Azimuth: 46.38

Sun: Altitude: 56.94 Azimuth: 13.50

Moon: Altitude: 39.29 Azimuth: 279.69

Kislovodsk

Object: Altitude: 7.11 Azimuth: 2.33

Sun: Altitude: 39.87 Azimuth: 281.70

Moon: Altitude: -0.91 Azimuth: 233.65

Tavrida

Object: Altitude: 6.02 Azimuth: 355.69

Sun: Altitude: 33.70 Azimuth: 275.79

Moon: Altitude: -5.00 Azimuth: 227.47

SAAO

Object: Altitude: 73.41 Azimuth: 299.17

Sun: Altitude: 2.05 Azimuth: 245.50

Moon: Altitude: -53.67 Azimuth: 271.63

IAC

Object: Altitude: 4.73 Azimuth: 319.76

Sun: Altitude: -8.75 Azimuth: 242.42

Moon: Altitude: -36.95 Azimuth: 183.81

Argentina

Object: Altitude: 6.84 Azimuth: 312.31

Sun: Altitude: -71.39 Azimuth: 308.44

Moon: Altitude: -46.20 Azimuth: 93.59

Mexico

Object: Altitude: -64.25 Azimuth: 296.51

Sun: Altitude: -33.91 Azimuth: 150.46

Moon: Altitude: 12.85 Azimuth: 111.23

Ural

Object: Altitude: -7.61 Azimuth: 15.53

Sun: Altitude: 43.96 Azimuth: 309.97

Moon: Altitude: 15.01 Azimuth: 247.65

Vostryakovo

Object: Altitude: -4.50 Azimuth: 358.65

Sun: Altitude: 34.08 Azimuth: 286.07

Moon: Altitude: 3.85 Azimuth: 230.32

Gal. latitude: -73.439453 Gal. longitude: 344.463062

Dist. to Sun: 78.267923

Dist. to Moon: 128.466449

Moon coord.: (118.767619 d, 24.655860 d)

Sun coord.: (53.937719 d, 19.318406 d)

Lunar disk: 0.249607

Lunar phase: 120.051997

Lunar bright limb: 278.931146

No SN in this field

2021-05-17 06:33:55 (JD 2459351.773553)

Siderial time 0.752268 h

Ra 23:52:41.76 Dec -39:06:18.00
(358.174000d, -39.105000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -36.63 Azimuth: 70.44

Sun: Altitude: 41.63 Azimuth: 67.80

Moon: Altitude: 60.68 Azimuth: 324.60

Tunka

Object: Altitude: -23.61 Azimuth: 56.11

Sun: Altitude: 52.95 Azimuth: 37.29

Moon: Altitude: 47.81 Azimuth: 293.60

Kislovodsk

Object: Altitude: 5.56 Azimuth: 13.95

Sun: Altitude: 50.14 Azimuth: 295.56

Moon: Altitude: 7.95 Azimuth: 243.39

Tavrida

Object: Altitude: 5.73 Azimuth: 7.40

Sun: Altitude: 44.12 Azimuth: 288.16

Moon: Altitude: 3.13 Azimuth: 237.83

SAAO

Object: Altitude: 82.64 Azimuth: 337.01

Sun: Altitude: 13.13 Azimuth: 236.61

Moon: Altitude: -41.43 Azimuth: 264.40

IAC

Object: Altitude: 12.50 Azimuth: 328.56

Sun: Altitude: 3.34 Azimuth: 249.81

Moon: Altitude: -34.40 Azimuth: 199.72

Argentina

Object: Altitude: 16.76 Azimuth: 306.04

Sun: Altitude: -60.04 Azimuth: 287.22

Moon: Altitude: -58.47 Azimuth: 85.73

Mexico

Object: Altitude: -52.61 Azimuth: 295.13

Sun: Altitude: -38.58 Azimuth: 167.05

Moon: Altitude: 1.54 Azimuth: 118.02

Ural

Object: Altitude: -10.57 Azimuth: 26.95

Sun: Altitude: 49.27 Azimuth: 329.15

Moon: Altitude: 22.49 Azimuth: 259.09

Vostryakovo

Object: Altitude: -5.17 Azimuth: 10.33

Sun: Altitude: 41.88 Azimuth: 301.09

Moon: Altitude: 10.61 Azimuth: 241.71

Gal. latitude: -73.439453 Gal. longitude: 344.463062

Dist. to Sun: 78.300601

Dist. to Moon: 128.866787

Moon coord.: (119.328960 d, 24.588880 d)

Sun coord.: (53.979086 d, 19.327799 d)

Lunar disk: 0.253204

Lunar phase: 119.576900

Lunar bright limb: 279.153170

No SN in this field

2025-05-06 05:38:56 (JD 2460801.735370)

Siderial time 23.112616 h

Ra 23:52:41.76 Dec -39:06:18.00
(358.174000d, -39.105000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -22.68 Azimuth: 55.47

Sun: Altitude: 46.87 Azimuth: 50.56

Moon: Altitude: 14.71 Azimuth: 269.63

Tunka

Object: Altitude: -12.33 Azimuth: 39.96

Sun: Altitude: 53.99 Azimuth: 14.78

Moon: Altitude: -0.11 Azimuth: 251.04

Kislovodsk

Object: Altitude: 6.94 Azimuth: 354.86

Sun: Altitude: 38.85 Azimuth: 285.40

Moon: Altitude: -33.24 Azimuth: 196.80

Tavrida

Object: Altitude: 5.07 Azimuth: 348.30

Sun: Altitude: 32.69 Azimuth: 279.22

Moon: Altitude: -33.53 Azimuth: 186.79

SAAO

Object: Altitude: 66.18 Azimuth: 294.39

Sun: Altitude: 4.64 Azimuth: 247.09

Moon: Altitude: -68.03 Azimuth: 19.81

IAC

Object: Altitude: -0.97 Azimuth: 315.02

Sun: Altitude: -9.32 Azimuth: 245.44

Moon: Altitude: -31.21 Azimuth: 126.22

Argentina

Object: Altitude: 1.06 Azimuth: 316.96

Sun: Altitude: -68.54 Azimuth: 311.52

Moon: Altitude: 0.27 Azimuth: 103.74

Mexico

Object: Altitude: -71.44 Azimuth: 301.32

Sun: Altitude: -36.94 Azimuth: 150.23

Moon: Altitude: 47.13 Azimuth: 72.15

Ural

Object: Altitude: -6.54 Azimuth: 8.14

Sun: Altitude: 41.94 Azimuth: 313.07

Moon: Altitude: -16.76 Azimuth: 212.11

Vostryakovo

Object: Altitude: -4.98 Azimuth: 351.23

Sun: Altitude: 32.45 Azimuth: 289.14

Moon: Altitude: -22.64 Azimuth: 190.16

Gal. latitude: -73.439453 Gal. longitude: 344.463062

Dist. to Sun: 69.693951

Dist. to Moon: 146.754427

Moon coord.: (157.317168 d, 11.499150 d)

Sun coord.: (43.140036 d, 16.518757 d)

Lunar disk: 0.665187

Lunar phase: 70.708525

Lunar bright limb: 292.206924

No SN in this field
Recent coverage and limits telegrams

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

  ID = 4266
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 SWIFT GRB 210517A ( V. D'Elia et al., GCN 30032) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  20.5 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614653

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     415 |         MASTER-OAFA |   C |   320 | 17.1 |  Coadd 
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
     974 |         MASTER-OAFA |   C |   180 | 12.9 |        
    1187 |         MASTER-OAFA |   C |   180 | 17.3 |        
    1997 |         MASTER-OAFA |   C |  1800 | 19.6 |  Coadd 
    1386 |         MASTER-OAFA |   C |   180 | 17.8 |        
    1566 |         MASTER-OAFA |   C |   540 | 18.9 |  Coadd 
    1585 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1785 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1984 |         MASTER-OAFA |   C |   180 | 18.5 |        
    2164 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
    2184 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2383 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2583 |         MASTER-OAFA |   C |   180 | 18.7 |        
    2763 |         MASTER-OAFA |   C |   540 | 18.7 |  Coadd 
    2782 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2982 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3181 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3361 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3991 |         MASTER-OAFA |   C |  1800 | 20.1 |  Coadd 
    3381 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3580 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3780 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3960 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3979 |         MASTER-OAFA |   C |   180 | 18.5 |        
    4179 |         MASTER-OAFA |   C |   180 | 18.6 |        
    4378 |         MASTER-OAFA |   C |   180 | 18.8 |        
    4558 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
    4578 |         MASTER-OAFA |   C |   180 | 19.0 |        
    4777 |         MASTER-OAFA |   C |   180 | 18.9 |        
    4977 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5157 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5176 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5986 |         MASTER-OAFA |   C |  1800 | 20.5 |  Coadd 
    5376 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5576 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5756 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5775 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5975 |         MASTER-OAFA |   C |   180 | 19.0 |        
    6174 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6354 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6374 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6573 |         MASTER-OAFA |   C |   180 | 18.9 |        
    6773 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6953 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6972 |         MASTER-OAFA |   C |   180 | 19.1 |        
    7172 |         MASTER-OAFA |   C |   180 | 19.1 |        
    7371 |         MASTER-OAFA |   C |   180 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4261
TYPE = 35
DAYS = 0.5


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 SWIFT GRB 210517A ( V. D'Elia et al., GCN 30032) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  20.5 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614653

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     415 |         MASTER-OAFA |   C |   320 | 17.1 |  Coadd 
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
     974 |         MASTER-OAFA |   C |   180 | 12.9 |        
    1187 |         MASTER-OAFA |   C |   180 | 17.3 |        
    1997 |         MASTER-OAFA |   C |  1800 | 19.6 |  Coadd 
    1386 |         MASTER-OAFA |   C |   180 | 17.8 |        
    1566 |         MASTER-OAFA |   C |   540 | 18.9 |  Coadd 
    1585 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1785 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1984 |         MASTER-OAFA |   C |   180 | 18.5 |        
    2164 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
    2184 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2383 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2583 |         MASTER-OAFA |   C |   180 | 18.7 |        
    2763 |         MASTER-OAFA |   C |   540 | 18.7 |  Coadd 
    2782 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2982 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3181 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3361 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3991 |         MASTER-OAFA |   C |  1800 | 20.1 |  Coadd 
    3381 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3580 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3780 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3960 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3979 |         MASTER-OAFA |   C |   180 | 18.5 |        
    4179 |         MASTER-OAFA |   C |   180 | 18.6 |        
    4378 |         MASTER-OAFA |   C |   180 | 18.8 |        
    4558 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
    4578 |         MASTER-OAFA |   C |   180 | 19.0 |        
    4777 |         MASTER-OAFA |   C |   180 | 18.9 |        
    4977 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5157 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5176 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5986 |         MASTER-OAFA |   C |  1800 | 20.5 |  Coadd 
    5376 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5576 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5756 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5775 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5975 |         MASTER-OAFA |   C |   180 | 19.0 |        
    6174 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6354 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6374 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6573 |         MASTER-OAFA |   C |   180 | 18.9 |        
    6773 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6953 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6972 |         MASTER-OAFA |   C |   180 | 19.1 |        
    7172 |         MASTER-OAFA |   C |   180 | 19.1 |        
    7371 |         MASTER-OAFA |   C |   180 | 19.1 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4257
TYPE = 35
DAYS = 0.1


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 SWIFT GRB 210517A ( V. D'Elia et al., GCN 30032) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  20.1 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614658

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     415 |         MASTER-OAFA |   C |   320 | 17.1 |  Coadd 
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
     974 |         MASTER-OAFA |   C |   180 | 12.9 |        
    1187 |         MASTER-OAFA |   C |   180 | 17.3 |        
    1997 |         MASTER-OAFA |   C |  1800 | 19.6 |  Coadd 
    1386 |         MASTER-OAFA |   C |   180 | 17.8 |        
    1566 |         MASTER-OAFA |   C |   540 | 18.9 |  Coadd 
    1585 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1785 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1984 |         MASTER-OAFA |   C |   180 | 18.5 |        
    2164 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
    2184 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2383 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2583 |         MASTER-OAFA |   C |   180 | 18.7 |        
    2763 |         MASTER-OAFA |   C |   540 | 18.7 |  Coadd 
    2782 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2982 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3181 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3361 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3991 |         MASTER-OAFA |   C |  1800 | 20.1 |  Coadd 
    3381 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3580 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3780 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3960 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3979 |         MASTER-OAFA |   C |   180 | 18.5 |        
    4179 |         MASTER-OAFA |   C |   180 | 18.6 |        
    4378 |         MASTER-OAFA |   C |   180 | 18.8 |        
    4558 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
    4578 |         MASTER-OAFA |   C |   180 | 19.0 |        
    4777 |         MASTER-OAFA |   C |   180 | 18.9 |        
    4977 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5157 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5176 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5376 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5576 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5756 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5775 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5975 |         MASTER-OAFA |   C |   180 | 19.0 |        
    6174 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6354 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6374 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6573 |         MASTER-OAFA |   C |   180 | 18.9 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4256
TYPE = 35
DAYS = 0.085


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 SWIFT GRB 210517A ( V. D'Elia et al., GCN 30032) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  20.1 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614658

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     415 |         MASTER-OAFA |   C |   320 | 17.1 |  Coadd 
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
     974 |         MASTER-OAFA |   C |   180 | 12.9 |        
    1187 |         MASTER-OAFA |   C |   180 | 17.3 |        
    1997 |         MASTER-OAFA |   C |  1800 | 19.6 |  Coadd 
    1386 |         MASTER-OAFA |   C |   180 | 17.8 |        
    1566 |         MASTER-OAFA |   C |   540 | 18.9 |  Coadd 
    1585 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1785 |         MASTER-OAFA |   C |   180 | 18.3 |        
    1984 |         MASTER-OAFA |   C |   180 | 18.5 |        
    2164 |         MASTER-OAFA |   C |   540 | 19.3 |  Coadd 
    2184 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2383 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2583 |         MASTER-OAFA |   C |   180 | 18.7 |        
    2763 |         MASTER-OAFA |   C |   540 | 18.7 |  Coadd 
    2782 |         MASTER-OAFA |   C |   180 | 18.6 |        
    2982 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3181 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3361 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3991 |         MASTER-OAFA |   C |  1800 | 20.1 |  Coadd 
    3381 |         MASTER-OAFA |   C |   180 | 18.6 |        
    3580 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3780 |         MASTER-OAFA |   C |   180 | 18.7 |        
    3960 |         MASTER-OAFA |   C |   540 | 19.4 |  Coadd 
    3979 |         MASTER-OAFA |   C |   180 | 18.5 |        
    4179 |         MASTER-OAFA |   C |   180 | 18.6 |        
    4378 |         MASTER-OAFA |   C |   180 | 18.8 |        
    4558 |         MASTER-OAFA |   C |   540 | 19.5 |  Coadd 
    4578 |         MASTER-OAFA |   C |   180 | 19.0 |        
    4777 |         MASTER-OAFA |   C |   180 | 18.9 |        
    4977 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5157 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5176 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5376 |         MASTER-OAFA |   C |   180 | 19.0 |        
    5576 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5756 |         MASTER-OAFA |   C |   540 | 19.7 |  Coadd 
    5775 |         MASTER-OAFA |   C |   180 | 19.1 |        
    5975 |         MASTER-OAFA |   C |   180 | 19.0 |        
    6174 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6354 |         MASTER-OAFA |   C |   540 | 19.6 |  Coadd 
    6374 |         MASTER-OAFA |   C |   180 | 19.1 |        
    6573 |         MASTER-OAFA |   C |   180 | 18.9 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4255
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 SWIFT GRB210517.23 (trigger No 1048783,23h 52m 41.76s , -39d 06m 18.0s, R=0.05) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614656

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4254
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 SWIFT GRB210517.23 (trigger No 1048783,23h 52m 41.76s , -39d 06m 18.0s, R=0.05) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614656

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
Filter C is a clear (unfiltred) band. 


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



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

  ID = 4253
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 SWIFT GRB210517.23 (trigger No 1048783,23h 52m 41.76s , -39d 06m 18.0s, R=0.05) errorbox  40 sec after notice time and 254 sec after trigger time at 2021-05-17 05:32:16 UT, with upper limit up to  16.2 mag. The observations began at zenith distance = 83 deg. The sun  altitude  is -71.9 deg. 

The galactic latitude b = -73 deg., longitude l = 344 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/observ.php?id=1614656

We obtain a following upper limits.  

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

     280 |         MASTER-OAFA |   C |    50 | 16.2 |        
     486 |         MASTER-OAFA |   C |    90 | 15.4 |        
     784 |         MASTER-OAFA |   C |   140 | 15.8 |        
Filter C is a clear (unfiltred) band. 


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

MASTER, 2002-2025