Swift Trigger: 1351008

Presumed name: GRB 250920B

BAT	12^h 29^m 20.88^s, +47° 50′ 38.4″
position:	(187.337, +47.844 ± 180″)
XRT	12^h 29^m 16.30^s, +47° 50′ 13.9″
position:	(187.3179, 47.8372 ± 4.7″)
UVOT	12^h 29^m 16.06^s, +47° 50′ 14.3″
position:	(187.3169, +47.8373 ± 0.7″)
Galactic N_HI:	1.08×10²⁰ cm^-2
Galactic E(B-V):	0.013 mag

Best RA:	12^h 29^m 16.06^s	= 187.3169 d
Best Dec:	+47° 50′ 14.3″	= +47.8373 d

Gal Lat:	68.84
Gal Long:	133.28

Sun angle:	47.54°, -0.7 hr East of Sun

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

No UVOT images are currently available.

XRT SPER data

SPER results page for this trigger.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Date reported	Source	Misc	Query

Catalogue Searches. Searched 200′ around UVOT position

Click on the distance to view the full details (not available for sources from the SSS catalogue). Click on the column headers to sort the table on that column (click again to invert sort order).

SIMBAD

	RA*	Dec*	SIMBAD name		Query
152.1	187.3725	47.8570	SDSS J122929.41+475125.3	G=20.080093, g=21.0721, i=20.6625, r=20.8172, u=21.1884, z=20.7439

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
9.0	187.3200	47.8386		NED
9.1	187.3198	47.8389	R=22.8, g=22.9, i=21.2, u=25.0, z=24.3	SDSS
11.9	187.3179	47.8406		NED
12.5	187.3129	47.8350		NED
18.8	187.3150	47.8425		NED
19.3	187.3125	47.8417	Mag=24.2	NED
20.3	187.3171	47.8429	R=21.1, g=22.4, i=20.9, u=22.9, z=20.2	SDSS
20.3	187.3171	47.8431	Mag=22.4	NED
21.0	187.3168	47.8431	B2=19.9, R1=19.9	USNO-B1
24.6	187.3084	47.8336	R=23.0, g=22.7, i=22.9, u=22.7, z=23.4	SDSS

Queried APM-N, SDSS, PSCz, SSS, NED, 2MASSX, USNO-B1.

There are 552 galaxies within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example

Stars

	RA*	Dec*		Catalogue
19.3	187.3124	47.8417	I=22.9, R=22.6, g=24.1, u=24.6, z=22.0	SDSS
27.4	187.3251	47.8426	h=16.0, j=16.7, k=14.9	2MASS
27.9	187.3252	47.8427	B1=20.6, B2=20.6, I=17.6, R1=18.5, R2=18.2	USNO-B1
32.5	187.3047	47.8410	B1=20.6, I=18.8	USNO-B1
50.1	187.3245	47.8503	R1=19.4, R2=20.4	USNO-B1
56.8	187.3397	47.8411	B1=20.8, B2=20.8, R2=19.8	USNO-B1
60.8	187.3123	47.8539	B2=21.4, I=18.6	USNO-B1
61.3	187.2960	47.8470	I=17.8, R=18.0, g=18.5, u=19.7, z=17.7	SDSS
63.8	187.3269	47.8537	B2=21.2, R1=18.8	USNO-B1
68.7	187.3249	47.8190	B2=20.5, R1=19.1	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 160 stars within the position error. The full list is here.

* RA/Dec in equinox J2000

Magnitudes depend on the catalogue. e.g. For Sloan, R is the Sloan r mag, not the Johnson R from APM, for example.