Swift Trigger: 537195

Presumed name: GRB 121031A

BAT	11^h 23^m 05.04^s, -03° 30′ 38.2″
position:	(170.771, -3.5106 ± 180″)
XRT	11^h 23^m 04.92^s, -03° 31′ 01.9″
position:	(170.7705, -3.5172 ± 2.0″)
UVOT	No position available.
Galactic N_HI:	3.98×10²⁰ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	11^h 23^m 04.92^s	= 170.7705 d
Best Dec:	-03° 31′ 01.9″	= -3.5172 d

Gal Lat:	52.67
Gal Long:	264.69

Sun angle:	46.41°, 3.05 hr West

¹Sper #8 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 8 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 11 23 04.91 (-3.5172)
- Dec (J2000): -03 31 01.9 ( -3.51603)
- Error (90%): 2.0
- Counts in Source: 820

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′′	170.77050	-3.51720	GCN #13935	GRB 121031A: Prompt enhanced Swift-XRT position
1.2′′	170.77021	-3.51703	GCN #13944	GRB 121031A: Enhanced Swift-XRT position
7.9′′	170.76940	-3.51530	GCN #13934	GRB 121031A: Swift detection of a burst
14.8′′	170.77167	-3.51325	GCN #13936	GRB 121031A: Swift-BAT refined analysis

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
86.7	170.7938	-3.5233	2dFGRS TGN169Z185	B=19.310, R=17.888
87.5	170.7473	-3.5247	2dFGRS TGN169Z199	B=16.714, H=12.562, J=13.273, K=12.202, R=15.160
137.4	170.7658	-3.5551	2dFGRS TGN235Z079	B=19.459, R=18.058
141.2	170.7699	-3.4780	2dFGRS TGN235Z078	B=16.665, H=12.345, J=13.211, K=11.991, R=15.399
150.2	170.7889	-3.4798	2dFGRS TGN235Z077	B=19.395, R=18.139

There are 5 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
7.4	170.7705	-3.5151	B=20.8, R2=19.1, i=18.6	SSS
29.8	170.7780	-3.5137	B=21.7, R2=19.8	SSS
30.0	170.7779	-3.5134	B2=24.1, R2=20.0	USNO-B1
34.1	170.7784	-3.5225	B=22.1	SSS
43.2	170.7712	-3.5292	B2=23.8, I=18.6	USNO-B1
48.8	170.7617	-3.5068	B=19.8, R2=18.8, i=18.8	SSS
48.8	170.7617	-3.5069	Mag=19.95	NED
49.0	170.7615	-3.5069	B=21.5, R=18.9	APM-N
51.9	170.7573	-3.5231	I=18.6, R1=19.8, R2=19.7	USNO-B1
71.9	170.7617	-3.4993	B=22.3	SSS

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

There are 115 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
7.7	170.7706	-3.5151	B1=23.6, B2=22.5, I=18.7, R2=19.0	USNO-B1
31.4	170.7783	-3.5134	B1=23.5, I=18.7, R2=20.0	USNO-B1
32.9	170.7749	-3.5252	B1=20.1, B2=20.0, I=17.4, R1=17.6, R2=17.5	USNO-B1
33.2	170.7749	-3.5253	h=15.6, j=16.3, k=15.4	2MASS
34.9	170.7654	-3.5254	B2=23.8, R1=19.8	USNO-B1
44.6	170.7714	-3.5296	B1=23.4, B2=22.2, I=18.6, R2=19.8	USNO-B1
47.7	170.7589	-3.5236	B2=23.8, I=18.2, R1=19.4, R2=19.7	USNO-B1
48.5	170.7619	-3.5068	B1=21.3, B2=20.1, I=18.5, R1=19.4, R2=18.4	USNO-B1
53.4	170.7646	-3.5036	B1=21.4, B2=23.9, R2=20.1	USNO-B1
70.7	170.7901	-3.5185	I=18.5, R2=20.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 82 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.