Swift Trigger: 791201

Presumed name: GRB 171120A

BAT	10^h 55^m 08.88^s, +22° 27′ 00.0″
position:	(163.787, 22.450 ± 180″)
XRT	10^h 55^m 09.86^s, +22° 27′ 30.2″
position:	(163.7911, 22.4584 ± 2.5″)
UVOT	No position available.
Galactic N_HI:	1.12×10⁰ cm^-2
Galactic E(B-V):	0.018 mag

Best RA:	10^h 55^m 09.86^s	= 163.7911 d
Best Dec:	+22° 27′ 30.2″	= 22.4584 d

Gal Lat:	63.26
Gal Long:	216.54

Sun angle:	82.07°, 4.8 hr West

¹Sper #2 auto processing.

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

u image

white image

Blink images with DSS (link via GSFC)

XRT SPER data

SPER results page for this trigger.

There are 4 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 10 55 09.85 (22.4586)
- Dec (J2000): +22 27 31.1 ( 22.45873)
- Error (90%): 2.5
- Counts in Source: 173

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
0.0′′	163.79110	22.45840	GCN #22133	GRB 171120A: Swift detection of a burst
2.5′′	163.79042	22.45869	GCN #22135	GRB 171120A: Enhanced Swift-XRT position
265.9′′	163.84000	22.40000	GCN #22136	GRB 171120A: Fermi-LAT detection

Catalogue Searches. Searched 3.33′ 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
139.8	163.7751	22.4225	[SPD2011] 24424
175.8	163.7601	22.4188	SDSS J105502.42+222507.8	g=21.6, i=20.39, r=20.56, u=21.9, z=19.7
189.3	163.7915	22.4058	SDSS J105509.95+222420.9	g=22.1, i=20.2, r=20.59, u=21.9, z=19.6

There are 3 SIMBAD objects within the position error. The full list is here.

* 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
16.5	163.7912	22.4631	Mag=24.3	NED
17.0	163.7865	22.4563	R=21.8, g=23.6, i=21.4, u=23.3, z=22.4	SDSS
17.0	163.7862	22.4564	Mag=22.8	NED
20.7	163.7849	22.4586	R=21.3, g=23.3, i=20.7, u=24.9, z=20.3	SDSS
20.7	163.7850	22.4586	Mag=22.5	NED
21.9	163.7955	22.4539	R=21.7, g=22.6, i=21.2, u=24.4, z=20.6	SDSS
22.0	163.7954	22.4539	Mag=22.4	NED
30.1	163.7892	22.4667	Mag=22.0	NED
30.1	163.7891	22.4666	R=22.9, g=25.3, i=23.0, u=22.9, z=22.1	SDSS
35.8	163.7954	22.4493	R=23.1, g=23.7, i=21.7, u=23.0, z=22.6	SDSS

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

There are 485 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
16.5	163.7913	22.4630	I=23.5, R=23.0, g=24.2, u=24.8, z=23.1	SDSS
36.3	163.8015	22.4553	I=21.8, R=22.6, g=24.5, u=24.7, z=21.0	SDSS
37.7	163.7800	22.4607	B1=21.6, B2=20.1, I=19.0, R2=19.9	USNO-B1
38.3	163.7798	22.4606	I=19.7, R=20.2, g=21.5, u=23.5, z=19.4	SDSS
45.2	163.7820	22.4491	B1=20.6, B2=20.9, I=19.0, R2=19.7	USNO-B1
47.1	163.7894	22.4454	I=21.4, R=22.0, g=23.1, u=25.1, z=21.1	SDSS
48.1	163.7799	22.4669	B1=20.5, B2=20.9, R1=19.5, R2=20.0	USNO-B1
48.2	163.7798	22.4668	I=20.1, R=20.2, g=20.6, u=21.6, z=20.1	SDSS
59.1	163.8087	22.4606	I=18.8, R2=19.9	USNO-B1
61.9	163.8096	22.4599	I=18.8, R=18.9, g=19.3, u=20.2, z=18.8	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 161 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.