Swift Trigger: 709351

Presumed name: GRB 160821A

BAT	11^h 24^m 59.52^s, +42° 20′ 34.8″
position:	(171.248, +42.343 ± 180″)
XRT	No position available.
UVOT	No position available.
Galactic N_HI:	2.71×10⁰ cm^-2
Galactic E(B-V):	0.020 mag

Best RA:	11^h 24^m 59.52^s	= 171.248 d
Best Dec:	+42° 20′ 34.8″	= +42.343 d

Gal Lat:	66.74
Gal Long:	166.51

Sun angle:	35.19°, -1.3 hr East of Sun

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

No UVOT images are currently available.

XRT SPER data

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.0′′	171.24800	42.34300	GCN #19830	GRB 160821A: Swift detection of a bright burst
17.4′′	171.25375	42.34528	GCN #19840	GRB 160821A: Swift-BAT refined analysis
207.7′′	171.30000	42.30000	GCN #19836	GRB 160821A: Fermi-LAT refined analysis

Catalogue Searches. Searched 3.33′ around BAT 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
140.1	171.1954	42.3414	TYC 3015-3-1	B=12.93, H=10.799, J=11.107, K=10.721, V=12.77
151.9	171.2545	42.3011	TYC 3015-14-1	B=12.95, H=10.761, J=11.067, K=10.69, V=12.11

* 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
10.6	171.2475	42.3458	Mag=24.9	NED
10.6	171.2476	42.3459	R=22.3, g=25.2, i=24.5, u=24.7, z=22.5	SDSS
17.1	171.2441	42.3468	R=18.1, g=19.2, i=17.6, u=20.9, z=17.3	SDSS
17.1	171.2442	42.3467	Mag=19.3	NED
17.2	171.2439	42.3467	B=19.7, R=17.2	APM-N
22.8	171.2398	42.3412	R=22.3, g=23.4, i=21.9, u=23.3, z=21.1	SDSS
22.9	171.2396	42.3411	Mag=20.4	NED
25.8	171.2558	42.3472	Mag=23.6	NED
25.8	171.2559	42.3472	R=21.9, g=23.5, i=20.4, u=24.8, z=19.8	SDSS
26.7	171.2400	42.3385	R=21.8, g=22.6, i=21.0, u=23.1, z=20.3	SDSS

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

There are 490 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
17.3	171.2440	42.3468	B1=18.6, B2=18.6, R1=18.0, R2=17.6	USNO-B1
17.4	171.2441	42.3469	h=16.0, j=16.9, k=15.5	2MASS
23.7	171.2410	42.3471	B2=21.3, I=18.9, R1=19.0	USNO-B1
27.3	171.2563	42.3386	I=23.5, R=24.6, g=25.9, u=22.0, z=22.5	SDSS
27.5	171.2552	42.3485	B1=18.7, B2=18.9, I=18.1, R1=18.2, R2=17.9	USNO-B1
28.8	171.2522	42.3504	B1=18.8, B2=21.6, R1=18.8, R2=20.4	USNO-B1
30.8	171.2532	42.3354	I=19.8, R=21.3, g=22.8, u=25.8, z=19.0	SDSS
49.5	171.2294	42.3427	B2=20.6, I=18.2, R1=19.1, R2=19.0	USNO-B1
54.6	171.2575	42.3564	h=16.3, j=16.9, k=15.7	2MASS
54.9	171.2576	42.3565	B2=19.3, I=17.6, R1=19.5, R2=18.4	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 162 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.