Swift Trigger: 531223

Presumed name: GRB 120816A

BAT	18^h 48^m 30.24^s, -06° 58′ 44.0″
position:	(282.126, -6.9789 ± 180″)
XRT	18^h 48^m 34.30^s, -06° 56′ 17.5″
position:	(282.1429, -6.9382 ± 2.2″)
UVOT	No position available.
Galactic N_HI:	3.74×10²¹ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	18^h 48^m 34.30^s	= 282.1429 d
Best Dec:	-06° 56′ 17.5″	= -6.9382 d

Gal Lat:	-2.52
Gal Long:	26.43

Sun angle:	135.80°, -9.03 hr East of Sun

¹Sper #4 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) : 18 48 34.33 (-6.9381)
- Dec (J2000): -06 56 17.2 ( -6.93748)
- Error (90%): 2.1
- Counts in Source: 320

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
1.0′′	282.14296	-6.93792	GCN #13660	GRB 120816A: Enhanced Swift-XRT position
2.2′′	282.14333	-6.93778	GCN #13657	GRB120816A: OPTIMA discovery of optical counterpart
5.5′′	282.14429	-6.93753	GCN #13654	GRB 120816A: Swift detection of a burst
157.8′′	282.13333	-6.98100	GCN #13659	GRB 120816A: 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
130.4	282.1605	-6.9699	TYC 5126-1042-1	B=12.28, V=12.14
195.8	282.0884	-6.9329	TYC 5126-1139-1	B=11.41, V=11.14

* RA/Dec in equinox J2000

X-ray sources

	RA*	Dec*		Source table²	Observatory	Query
149.4	282.1554	-6.9778	5.670e-3 +/- 1.300e-3	8.500e-14	WGACAT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
3.8	282.1429	-6.9393	B1=20.3, B2=19.8, R2=19.9	USNO-B1
7.0	282.1447	-6.9389	B1=20.3, B2=19.9, I=26.2, R1=19.3, R2=19.3	USNO-B1
11.2	282.1423	-6.9351	B1=20.3, B2=19.6, I=19.4, R2=20.0	USNO-B1
11.9	282.1408	-6.9408	B1=20.2, B2=18.7	USNO-B1
13.1	282.1457	-6.9406	B1=18.9, B2=16.7, I=14.9, R1=16.1, R2=15.5	USNO-B1
13.3	282.1462	-6.9399	B1=20.1, B2=17.8, I=17.3	USNO-B1
14.1	282.1457	-6.9410	B1=20.0, B2=17.4, I=15.6	USNO-B1
17.5	282.1405	-6.9424	B1=19.0, B2=19.9, I=16.5, R2=19.8	USNO-B1
17.9	282.1397	-6.9344	B2=19.8, R2=21.6	USNO-B1
18.0	282.1429	-6.9332	B1=20.3, I=17.8, R2=17.1	USNO-B1

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

There are 1139 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
7.5	282.1410	-6.9372	B1=19.5, B2=18.6, I=17.1, R1=18.2	USNO-B1
9.8	282.1403	-6.9373	I=17.6, R1=18.1	USNO-B1
11.9	282.1438	-6.9350	h=11.9, j=12.6, k=11.7	2MASS
12.4	282.1443	-6.9351	B1=16.6, I=13.0, R2=15.3	USNO-B1
12.5	282.1456	-6.9404	h=14.1, j=14.6, k=14.0	2MASS
13.0	282.1393	-6.9374	B1=20.1, B2=18.2, I=16.2, R1=17.5, R2=17.0	USNO-B1
13.3	282.1418	-6.9417	B1=20.1, B2=18.6, R2=15.8	USNO-B1
13.4	282.1392	-6.9374	h=14.3, j=15.0, k=14.2	2MASS
13.7	282.1420	-6.9419	B1=18.4, B2=17.5, I=14.8, R1=16.0, R2=16.5	USNO-B1
13.7	282.1421	-6.9419	h=12.5, j=13.1, k=12.3	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 1996 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.