MASTER Net MASTER Database: LIGO alert

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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Name IPN GRB20210925_T04810
Type 1
Trigger time 2021-09-25 01:20:10
Notice time 2021-09-25 18:21:48.890989
Distance ± Mpc
BNS BHH NSBH Gap Terr
Galaxy in: 50%
90%
FULL

This work was supported by RFBR BRICS 17-52-80133 grant.
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)

DAYS:
Coverage since triggertime up to

ALL PLOTS
datetime T - Trig [h] T - Not [h] Area [sq. deg]
Box 50% 90% FULL
[%] 100.0 88.9 99.5
2021-10-09 01:20:10 336.0 319.0 234.3

Map with WFC

Discoveries in this field
No discoveries yet!

Synchronous WFC images
datetime coord2000 observatory camera links
2021-09-25 01:17:56.622 00h 00m 00.00s +00d 00m 00.0s OAFA 29008 Database OAFA
2021-09-25 01:18:38.771 00h 00m 00.00s +00d 00m 00.0s OAFA 111342 Database OAFA
Errorbox center visibility at MASTER facilities
SELECT set_sphere_output('HMS'); select set_sphere_output_precision(1); select distinct on (gn) get_grb_name2 (grbtime, satel ) as gn, coord2000, satel, errorbox, 'now'::timestamp,'now'::timestamp+'1 hour'::interval,grbtime+'1 hour'::interval from grb where tabs(grbtime-'2021-09-25 01:20:10')<'10 minutes'::interval order by gn,seq desc,errorbox asc;
trigger notice notice+1hr now

2021-09-25 01:20:10 (JD 2459482.555671)

Siderial time 4.116771 h

Ra 03:11:57.60 Dec -51:24:36.00
( 47.990000d, -51.410000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -44.06 Azimuth: 57.51

Sun: Altitude: 32.82 Azimuth: 323.33

Moon: Altitude: 2.72 Azimuth: 111.97

Tunka

Object: Altitude: -32.83 Azimuth: 46.82

Sun: Altitude: 20.38 Azimuth: 299.67

Moon: Altitude: 17.95 Azimuth: 93.22

Kislovodsk

Object: Altitude: -6.52 Azimuth: 11.59

Sun: Altitude: -18.39 Azimuth: 252.61

Moon: Altitude: 57.20 Azimuth: 38.56

Tavrida

Object: Altitude: -6.54 Azimuth: 6.36

Sun: Altitude: -23.73 Azimuth: 245.48

Moon: Altitude: 59.50 Azimuth: 23.31

SAAO

Object: Altitude: 70.84 Azimuth: 354.20

Sun: Altitude: -37.48 Azimuth: 300.40

Moon: Altitude: 41.63 Azimuth: 181.48

IAC

Object: Altitude: 2.74 Azimuth: 336.14

Sun: Altitude: -61.89 Azimuth: 192.55

Moon: Altitude: 52.49 Azimuth: 280.84

Argentina

Object: Altitude: 22.49 Azimuth: 317.62

Sun: Altitude: -34.98 Azimuth: 63.08

Moon: Altitude: -9.40 Azimuth: 256.96

Mexico

Object: Altitude: -50.90 Azimuth: 314.89

Sun: Altitude: -2.11 Azimuth: 90.38

Moon: Altitude: -24.38 Azimuth: 231.28

Ural

Object: Altitude: -22.34 Azimuth: 23.16

Sun: Altitude: -5.02 Azimuth: 263.63

Moon: Altitude: 40.20 Azimuth: 50.15

Vostryakovo

Object: Altitude: -17.42 Azimuth: 9.07

Sun: Altitude: -17.05 Azimuth: 245.17

Moon: Altitude: 48.75 Azimuth: 23.47

Gal. latitude: -54.016523 Gal. longitude: 264.677502

Dist. to Sun: 114.898159

Dist. to Moon: 67.403713

Moon coord.: (46.090986 d, 15.973272 d)

Sun coord.: (181.746214 d, -0.757321 d)

Lunar disk: 0.846289

Lunar phase: 46.165483

Lunar bright limb: 75.244810

No SN in this field

2021-09-25 18:21:48 (JD 2459483.265139)

Siderial time 21.190612 h

Ra 03:11:57.60 Dec -51:24:36.00
( 47.990000d, -51.410000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -11.73 Azimuth: 359.83

Sun: Altitude: -27.56 Azimuth: 233.34

Moon: Altitude: 58.06 Azimuth: 347.91

Tunka

Object: Altitude: -15.30 Azimuth: 344.33

Sun: Altitude: -36.27 Azimuth: 206.29

Moon: Altitude: 48.99 Azimuth: 311.76

Kislovodsk

Object: Altitude: -30.20 Azimuth: 314.01

Sun: Altitude: -34.67 Azimuth: 129.17

Moon: Altitude: 11.72 Azimuth: 255.06

Tavrida

Object: Altitude: -35.38 Azimuth: 310.24

Sun: Altitude: -29.13 Azimuth: 121.54

Moon: Altitude: 6.21 Azimuth: 249.56

SAAO

Object: Altitude: 15.37 Azimuth: 321.77

Sun: Altitude: -23.29 Azimuth: 72.77

Moon: Altitude: -29.36 Azimuth: 265.30

IAC

Object: Altitude: -54.72 Azimuth: 320.89

Sun: Altitude: 7.12 Azimuth: 84.96

Moon: Altitude: -35.02 Azimuth: 214.42

Argentina

Object: Altitude: -5.44 Azimuth: 10.60

Sun: Altitude: 49.12 Azimuth: 133.15

Moon: Altitude: -65.17 Azimuth: 64.17

Mexico

Object: Altitude: -43.26 Azimuth: 46.67

Sun: Altitude: 55.78 Azimuth: 337.32

Moon: Altitude: -10.45 Azimuth: 119.62

Ural

Object: Altitude: -31.99 Azimuth: 316.93

Sun: Altitude: -31.16 Azimuth: 153.32

Moon: Altitude: 24.02 Azimuth: 272.15

Vostryakovo

Object: Altitude: -40.01 Azimuth: 305.48

Sun: Altitude: -24.91 Azimuth: 129.61

Moon: Altitude: 11.87 Azimuth: 253.97

Gal. latitude: -54.016523 Gal. longitude: 264.677502

Dist. to Sun: 114.973029

Dist. to Moon: 70.471301

Moon coord.: (54.449475 d, 18.833304 d)

Sun coord.: (182.383886 d, -1.033635 d)

Lunar disk: 0.794707

Lunar phase: 53.884616

Lunar bright limb: 77.049092

No SN in this field

2021-09-25 19:21:48 (JD 2459483.306806)

Siderial time 22.193350 h

Ra 03:11:57.60 Dec -51:24:36.00
( 47.990000d, -51.410000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -12.50 Azimuth: 9.38

Sun: Altitude: -19.27 Azimuth: 246.99

Moon: Altitude: 58.06 Azimuth: 14.07

Tunka

Object: Altitude: -13.54 Azimuth: 353.83

Sun: Altitude: -31.00 Azimuth: 223.19

Moon: Altitude: 54.69 Azimuth: 332.14

Kislovodsk

Object: Altitude: -22.81 Azimuth: 320.46

Sun: Altitude: -42.01 Azimuth: 145.91

Moon: Altitude: 22.15 Azimuth: 264.45

Tavrida

Object: Altitude: -27.59 Azimuth: 316.36

Sun: Altitude: -37.43 Azimuth: 136.53

Moon: Altitude: 16.26 Azimuth: 259.15

SAAO

Object: Altitude: 23.65 Azimuth: 317.11

Sun: Altitude: -34.98 Azimuth: 61.96

Moon: Altitude: -17.29 Azimuth: 258.10

IAC

Object: Altitude: -45.87 Azimuth: 316.05

Sun: Altitude: -6.09 Azimuth: 92.09

Moon: Altitude: -26.51 Azimuth: 227.03

Argentina

Object: Altitude: -6.77 Azimuth: 1.28

Sun: Altitude: 38.73 Azimuth: 118.02

Moon: Altitude: -74.85 Azimuth: 34.42

Mexico

Object: Altitude: -52.50 Azimuth: 44.43

Sun: Altitude: 57.81 Azimuth: 4.65

Moon: Altitude: -20.63 Azimuth: 129.24

Ural

Object: Altitude: -26.89 Azimuth: 325.96

Sun: Altitude: -33.68 Azimuth: 170.86

Moon: Altitude: 31.96 Azimuth: 284.90

Vostryakovo

Object: Altitude: -33.43 Azimuth: 313.81

Sun: Altitude: -30.68 Azimuth: 145.29

Moon: Altitude: 20.11 Azimuth: 265.44

Gal. latitude: -54.016523 Gal. longitude: 264.677502

Dist. to Sun: 114.977307

Dist. to Moon: 70.663376

Moon coord.: (54.946825 d, 18.989495 d)

Sun coord.: (182.421346 d, -1.049862 d)

Lunar disk: 0.791511

Lunar phase: 54.336581

Lunar bright limb: 77.176822

No SN in this field

2025-04-12 06:03:43 (JD 2460777.752581)

Siderial time 21.949767 h

Ra 03:11:57.60 Dec -51:24:36.00
( 47.990000d, -51.410000d)

Rise n/a

Transit n/a

Set n/a

Amur

Object: Altitude: -12.17 Azimuth: 7.07

Sun: Altitude: 37.56 Azimuth: 51.00

Moon: Altitude: -31.72 Azimuth: 238.42

Tunka

Object: Altitude: -13.83 Azimuth: 351.50

Sun: Altitude: 45.32 Azimuth: 20.08

Moon: Altitude: -41.43 Azimuth: 210.39

Kislovodsk

Object: Altitude: -24.52 Azimuth: 318.82

Sun: Altitude: 36.62 Azimuth: 296.85

Moon: Altitude: -40.37 Azimuth: 126.53

Tavrida

Object: Altitude: -29.41 Azimuth: 314.79

Sun: Altitude: 30.64 Azimuth: 289.90

Moon: Altitude: -34.70 Azimuth: 118.70

SAAO

Object: Altitude: 21.57 Azimuth: 318.12

Sun: Altitude: 13.32 Azimuth: 250.52

Moon: Altitude: -20.94 Azimuth: 66.72

IAC

Object: Altitude: -48.09 Azimuth: 316.81

Sun: Altitude: -9.23 Azimuth: 254.88

Moon: Altitude: 2.94 Azimuth: 80.54

Argentina

Object: Altitude: -6.64 Azimuth: 3.57

Sun: Altitude: -59.29 Azimuth: 314.19

Moon: Altitude: 52.52 Azimuth: 125.17

Mexico

Object: Altitude: -50.29 Azimuth: 45.33

Sun: Altitude: -46.18 Azimuth: 151.81

Moon: Altitude: 50.61 Azimuth: 342.65

Ural

Object: Altitude: -28.04 Azimuth: 323.74

Sun: Altitude: 36.51 Azimuth: 322.87

Moon: Altitude: -37.23 Azimuth: 153.38

Vostryakovo

Object: Altitude: -34.95 Azimuth: 311.77

Sun: Altitude: 28.45 Azimuth: 298.91

Moon: Altitude: -30.85 Azimuth: 128.23

Gal. latitude: -54.016523 Gal. longitude: 264.677502

Dist. to Sun: 64.557733

Dist. to Moon: 114.109913

Moon coord.: (192.230509 d, -6.906614 d)

Sun coord.: (20.560386 d, 8.661124 d)

Lunar disk: 0.994633

Lunar phase: 8.402610

Lunar bright limb: 282.548967

No SN in this field
Recent coverage and limits telegrams
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#######################################################################################

  ID = 5080
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 IPN GRB210925.06 errorbox 58323 sec after trigger time at 2021-09-25 17:32:13 UT, with upper limit up to  18.0 mag. Observations started at twilight.  The observations began at zenith distance = 79 deg. The sun  altitude  is -12.5 deg. 

The galactic latitude b = -50 deg., longitude l = 277 deg.


Real time updated cover map and OT discovered available here: 
https://master.sai.msu.ru/site/master2/ligo_1.php?id=11636

We obtain a following upper limits.  

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

   58353 | 2021-09-25 17:32:13 |         MASTER-SAAO | (03h 08m 19.72s , -54d 02m 23.9s) |   C |    60 | 17.1 |        
   58831 | 2021-09-25 17:40:11 |         MASTER-SAAO | (03h 17m 35.74s , -55d 55m 49.8s) |   C |    60 | 17.6 |        
   58911 | 2021-09-25 17:41:31 |         MASTER-SAAO | (03h 20m 38.86s , -54d 01m 35.2s) |   C |    60 | 17.3 |        
   59088 | 2021-09-25 17:44:27 |         MASTER-SAAO | (03h 11m 55.44s , -52d 08m 36.8s) |   C |    60 | 17.3 |        
   59167 | 2021-09-25 17:45:47 |         MASTER-SAAO | (03h 04m 13.38s , -50d 14m 48.9s) |   C |    60 | 17.3 |        
   59327 | 2021-09-25 17:48:26 |         MASTER-SAAO | (03h 08m 21.47s , -54d 00m 41.7s) |   C |    60 | 17.6 |        
   59814 | 2021-09-25 17:56:34 |         MASTER-SAAO | (03h 03m 20.62s , -55d 55m 30.4s) |   C |    60 | 17.9 |        
   59894 | 2021-09-25 17:57:53 |         MASTER-SAAO | (03h 17m 30.37s , -55d 55m 28.1s) |   C |    60 | 17.8 |        
   59974 | 2021-09-25 17:59:13 |         MASTER-SAAO | (03h 20m 36.49s , -54d 00m 25.0s) |   C |    60 | 17.6 |        
   60228 | 2021-09-25 18:03:28 |         MASTER-SAAO | (03h 12m 02.29s , -52d 08m 46.8s) |   C |    60 | 17.8 |        
   60308 | 2021-09-25 18:04:47 |         MASTER-SAAO | (03h 25m 00.86s , -52d 06m 48.4s) |   C |    60 | 17.6 |        
   60387 | 2021-09-25 18:06:07 |         MASTER-SAAO | (03h 04m 13.46s , -50d 14m 53.9s) |   C |    60 | 18.0 |        
   60467 | 2021-09-25 18:07:26 |         MASTER-SAAO | (03h 16m 46.77s , -50d 12m 56.0s) |   C |    60 | 17.6 |        
   60626 | 2021-09-25 18:10:06 |         MASTER-SAAO | (03h 08m 21.03s , -54d 01m 07.9s) |   C |    60 | 17.8 |        
Filter C is a clear (unfiltred) band. 


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

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