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Swift Trigger: 709357

Presumed name: GRB 160821B

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

BAT	18h 39m 56.88s, +62° 23′ 34.8″
position:	(279.987, +62.393 ± 180″)
XRT	18h 39m 54.72s, +62° 23′ 31.2″
position:	(279.9780, 62.3920 ± 2.5″)
UVOT	No position available.
Galactic NHI:	4.87×100 cm-2
Galactic E(B-V):	0.051 mag

Best RA:	18h 39m 54.72s	= 279.9780 d
Best Dec:	+62° 23′ 31.2″	= 62.3920 d
Gal Lat:	25.14
Gal Long:	92.18
Sun angle:	95.91°, -8.6 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 - enhanced position.
  • RA (J2000) : 18 39 54.71 (62.3920)
  • Dec (J2000): +62 23 31.3 ( 62.39171)
  • Error (90%): 2.5
  • Counts in Source: 47

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′′	279.97800	62.39200		GCN #19833	GRB 160821B: Swift detection of a short burst
1.3′′	279.97733	62.39181		GCN #19834	GRB 160821B: NOT optical afterglow candidate
1.4′′	279.97733	62.39175		GCN #19854	GRB 160821B: VLA 5.0 GHz observations
3.5′′	279.97653	62.39129		GCN #19837	GRB 160821B: Enhanced Swift-XRT position
48.5′′	280.00500	62.38700		GCN #19844	GRB 160821B: 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

* 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
6.4	279.9750	62.3931		B1=20.8, B2=19.5, R2=19.6	USNO-B1
6.4	279.9747	62.3929		B1=20.3, B2=19.7, R2=19.1	USNO-B1
30.1	279.9636	62.3870		B=18.2, R=16.4	APM-N
30.6	279.9633	62.3869			NED
30.6	279.9632	62.3870		h=0.0, j=15.5, k=14.3	2MASS
36.6	279.9572	62.3952		B1=20.5, I=18.3, R2=20.4	USNO-B1
36.8	279.9661	62.4006		B=20.3, R=20.0	APM-N
37.2	279.9655	62.4006		B=20.6, R=18.6	APM-N
37.2	279.9658	62.4006		B1=19.1, B2=18.7, I=17.9, R1=18.8, R2=18.7	USNO-B1
37.9	279.9567	62.3957		B=21.9, R=19.5	APM-N

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

There are 151 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
5.6	279.9755	62.3930	B1=20.4, B2=19.9, R1=19.7	USNO-B1
21.8	279.9796	62.3860	I=18.5, R1=17.9	USNO-B1
30.5	279.9633	62.3870	B1=17.9, B2=17.7, I=16.3, R1=16.4, R2=16.4	USNO-B1
30.7	279.9633	62.3868	h=15.2, j=15.8, k=15.0	2MASS
31.7	279.9638	62.3861	B2=20.8, R1=19.0, R2=19.0	USNO-B1
38.5	279.9565	62.3959	B2=21.0, I=18.2, R1=19.4, R2=19.6	USNO-B1
45.5	279.9781	62.3793	h=13.4, j=13.7, k=13.4	2MASS
45.7	279.9781	62.3793	B1=15.4, B2=15.7, I=13.8, R1=14.4, R2=14.9	USNO-B1
49.2	279.9652	62.4043	B1=17.4, B2=17.6, I=17.2, R1=17.4, R2=17.2	USNO-B1
49.2	279.9648	62.4042	h=16.3, j=16.6, k=15.9	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 167 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.