Swift Trigger: 1080859

Presumed name: GRB 211023B

BAT	11^h 21^m 12.48^s, +39° 08′ 13.2″
position:	(170.302, 39.137 ± 180″)
XRT	11^h 21^m 14.52^s, +39° 08′ 09.4″
position:	(170.31048, 39.13595 ± 3.7″)
UVOT	11^h 21^m 14.30^s, +39° 08′ 08.5″
position:	(170.3096, +39.1357 ± 0.8″)
Galactic N_HI:	2.15×10²⁰ cm^-2
Galactic E(B-V):	0.022 mag

Best RA:	11^h 21^m 14.30^s	= 170.3096 d
Best Dec:	+39° 08′ 08.5″	= +39.1357 d

Gal Lat:	67.72
Gal Long:	174.61

Sun angle:	61.83°, 2.5 hr West

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.

There are 7 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 11 21 14.58 ( 170.31074)
- Dec (J2000): +39 08 08.7 ( 39.13575)
- Error (90%): 3.595"
- Counts in Source: 213

See the SPER page for details of how this position was produced.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.3′′	170.30963	39.13578	GCN #30960	GRB 211023B: Swift detection of a possibly short burst with an optical counterpart
0.4′′	170.30971	39.13578	GCN #30975	GRB 211023B: Swift/UVOT Detection
2.8′′	170.30871	39.13534	GCN #30966	GRB 211023B: Enhanced Swift-XRT position
15.2′′	170.31375	39.13297	GCN #30979	GRB 211023B: Swift-BAT refined analysis
36.9′′	170.30172	39.14392	GCN #31003	GRB 211023B: Mondy optical afterglow confirmation

There are 12 matches in total. See the full table for details.

Catalogue Searches. Searched 200′ around XRT 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
190.7	170.3523	39.1778	SDSS J112124.54+391040.2	G=17.3486, g=17.347, i=17.465, r=17.373, u=18.600, z=17.569
194.1	170.2429	39.1234	TYC 3013-206-1	B=11.72, G=10.1354, H=7.726, J=8.386, K=7.599, V=10.42

* 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
5.0	170.3113	39.1364		NED
7.6	170.3128	39.1370	R=22.0, g=23.2, i=22.3, u=23.2, z=21.6	SDSS
10.1	170.3129	39.1369	Mag=22.2	NED
14.8	170.3157	39.1367	B=21.8, R=20.0	APM-N
16.3	170.3042	39.1342		NED
21.1	170.3121	39.1303		NED
21.7	170.3122	39.1301	R=22.2, g=26.0, i=21.3, u=22.0, z=21.2	SDSS
25.5	170.3106	39.1430	R=21.1, g=22.2, i=21.1, u=22.4, z=20.6	SDSS
26.5	170.3104	39.1431	Mag=22.3	NED
32.8	170.3212	39.1364		NED

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

There are 332 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
37.5	170.3017	39.1438	I=14.9, R=15.5, g=16.9, u=19.5, z=14.6	SDSS
37.7	170.3017	39.1439	B1=17.5, B2=17.3, I=14.6, R1=15.4, R2=15.3	USNO-B1
37.8	170.3017	39.1439	h=12.8, j=13.4, k=12.6	2MASS
38.5	170.2975	39.1323	I=22.1, R=22.2, g=23.5, u=26.2, z=22.2	SDSS
52.4	170.3029	39.1492	B2=20.8, R2=20.0	USNO-B1
57.9	170.3106	39.1520	I=24.7, R=22.5, g=24.2, u=23.0, z=23.2	SDSS
59.5	170.3009	39.1507	I=24.9, R=22.6, g=25.6, u=23.4, z=24.3	SDSS
65.1	170.2877	39.1320	I=21.9, R=22.3, g=22.8, u=23.2, z=21.3	SDSS
67.9	170.3003	39.1188	B2=20.0, R1=19.7, R2=20.2	USNO-B1
76.7	170.2945	39.1533	I=20.5, R=20.7, g=20.9, u=22.0, z=20.7	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 103 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.