Swift Trigger: 653838

Presumed name: GRB 150831A

BAT	14^h 44^m 05.52^s, -25° 38′ 56.4″
position:	(221.023, -25.649 ± 180″)
XRT	14^h 44^m 05.83^s, -25° 38′ 08.5″
position:	(221.0243, -25.6357 ± 2.3″)
UVOT	No position available.
Galactic N_HI:	8.10×10⁰ cm^-2
Galactic E(B-V):	0.114 mag

Best RA:	14^h 44^m 05.83^s	= 221.0243 d
Best Dec:	-25° 38′ 08.5″	= -25.6357 d

Gal Lat:	30.67
Gal Long:	332.59

Sun angle:	69.22°, -4.1 hr East of Sun

¹Sper #7 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 7 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 14 44 05.82 (-25.6356)
- Dec (J2000): -25 38 08.0 ( -25.63466)
- Error (90%): 2.4
- Counts in Source: 44

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
0.6′′	221.02446	-25.63561	GCN #18209	GRB 150831A: Swift detection of a short burst
2.5′′	221.02421	-25.63500	GCN #18212	GRB 150831A: Enhanced Swift-XRT position
67.5′′	221.03375	-25.61900	GCN #18214	GRB 150831A: 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		Query

* 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
9.4	221.0219	-25.6372	B=21.7, R2=19.7, i=18.6	SSS
19.7	221.0205	-25.6400	B=21.2, R2=19.7, i=18.5	SSS
19.8	221.0204	-25.6399	I=18.4, R2=19.4	USNO-B1
22.1	221.0202	-25.6406	I=18.5, R1=19.7, R2=19.4	USNO-B1
39.0	221.0131	-25.6395	B=21.5, R2=20.2	SSS
50.1	221.0310	-25.6232	B2=21.0, R2=19.4	USNO-B1
50.4	221.0363	-25.6446	B2=20.6, I=18.3, R2=19.2	USNO-B1
50.4	221.0361	-25.6448	B=20.8, R2=19.3, i=18.2	SSS
68.0	221.0233	-25.6546	B1=20.8, B2=21.4, R1=19.6	USNO-B1
85.2	221.0191	-25.6589	B=20.3, R2=18.8, i=18.0	SSS

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

There are 38 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
9.7	221.0219	-25.6374	B2=21.3, I=18.8, R1=19.5, R2=19.4	USNO-B1
18.5	221.0275	-25.6399	B1=16.6, B2=16.2, I=14.9, R1=15.3, R2=15.4	USNO-B1
18.6	221.0275	-25.6400	h=14.1, j=14.4, k=13.9	2MASS
40.3	221.0175	-25.6451	B2=21.2, I=18.9, R1=19.6, R2=19.4	USNO-B1
41.6	221.0354	-25.6415	B2=20.9, R2=19.4	USNO-B1
49.6	221.0323	-25.6474	B2=21.5, R1=19.6, R2=19.4	USNO-B1
55.0	221.0277	-25.6207	h=15.7, j=16.3, k=15.6	2MASS
55.4	221.0278	-25.6206	B1=18.6, B2=18.1, I=17.1, R1=17.5, R2=17.3	USNO-B1
57.7	221.0403	-25.6287	h=15.6, j=16.1, k=15.5	2MASS
57.8	221.0403	-25.6287	B1=18.9, B2=18.0, I=16.9, R1=17.1, R2=17.2	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 157 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.