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Swift Trigger: 660671

Presumed name: GRB 151021A

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Related pages: Burst Analyser | Enhanced position | Light curve | Spectrum | Image | XRT Catalogue entry | Download obs data | GCN Notices

BAT	22h 30m 26.64s, -33° 11′ 56.4″
position:	(337.611, -33.199 ± 180″)
XRT	22h 30m 35.09s, -33° 11′ 56.7″
position:	(337.64619, -33.19907 ± 3.6″)
UVOT	No position available.
Galactic NHI:	1.09×100 cm-2
Galactic E(B-V):	0.012 mag

Best RA:	22h 30m 35.09s	= 337.64619 d
Best Dec:	-33° 11′ 56.7″	= -33.19907 d
Gal Lat:	-59.11
Gal Long:	12.94
Sun angle:	117.14°, -8.8 hr East of Sun

¹Sper #2 auto processing.

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GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

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Sun angle for this burst.

UVOT data

Blink images with DSS (link via GSFC)

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XRT SPER data

SPER results page for this trigger.

There are 2 SPER messages, and 1 objects have been found

• • Object 1
  • RA (J2000) : 22 30 35.09 ( 337.64619)
  • Dec (J2000): -33 11 56.7 ( -33.19907)
  • Error (90%): 3.629"
  • Counts in Source: 267

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

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Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Date reported	Source	Misc	Query
0.0′′	337.64619	-33.19907		GCN #18425	GRB 151021A: Swift detection of a burst
10.4′′	337.64347	-33.19731		GCN #18428	GRB 151021A: Enhanced Swift-XRT position
10.4′′	337.64346	-33.19731		GCN #18432	GRB 151021A: Swift/UVOT Detection
10.5′′	337.64342	-33.19731		GCN #18427	GRB 150921A: MASTER-NET bright OT detection
11.5′′	337.64320	-33.19707		GCN #18426	GRB 151021A: Optical counterpart and redshift from X-shooter
35.0′′	337.64708	-33.18939		GCN #18429	GRB 151021A: Swift-BAT refined analysis

There are 11 matches in total. See the full table for details.

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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
160.4	337.6946	-33.1805	TYC 7500-576-1	B=13.50, H=10.809, J=11.135, K=10.697, R=11.07, V=11.93

* 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*	Redshift		Catalogue	Query
20.6	337.6450	-33.2047		Mag=18.4	NED
21.5	337.6529	-33.2014		Mag=18.4	NED
21.9	337.6531	-33.2011		B=21.7, R2=20.6	SSS
30.4	337.6517	-33.2061		Mag=18.4	NED
40.7	337.6421	-33.1883		B=22.4, R2=21.2	SSS
41.1	337.6579	-33.1936		Mag=18.4	NED
53.2	337.6488	-33.2136		Mag=19.9	NED
57.0	337.6651	-33.2002		B=20.6, R2=19.4, i=19.3	SSS
57.8	337.6654	-33.2003		Mag=19.4	NED
74.1	337.6251	-33.2097		B=22.4	SSS

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

There are 95 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	Query
9.3	337.6443	-33.1970	B2=19.4, I=17.8	USNO-B1
20.7	337.6450	-33.2047	B2=20.4, I=18.7, R1=18.3, R2=18.9	USNO-B1
22.2	337.6532	-33.2008	B2=20.5, R1=19.6, R2=20.0	USNO-B1
32.4	337.6356	-33.2004	h=13.4, j=13.9, k=13.1	2MASS
32.7	337.6354	-33.2002	B2=18.8, I=14.8, R1=15.4, R2=15.5	USNO-B1
38.1	337.6410	-33.2087	B2=20.8, I=18.7, R1=19.6, R2=20.1	USNO-B1
41.9	337.6583	-33.1934	B2=19.5, I=18.4, R1=17.6, R2=18.0	USNO-B1
54.0	337.6484	-33.2140	B2=20.3, R1=19.6, R2=20.4	USNO-B1
57.3	337.6652	-33.2002	B2=20.8, R1=18.5, R2=19.4	USNO-B1
66.5	337.6283	-33.1883	B2=20.1, R2=20.5	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 74 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.