Swift Trigger: 541371

Presumed name: GRB 121212A

BAT	11^h 51^m 21.84^s, +78° 02′ 02.4″
position:	(177.841, 78.034 ± 180″)
XRT	11^h 51^m 10.18^s, +78° 02′ 14.6″
position:	(177.7924, 78.0374 ± 2.0″)
UVOT	No position available.
Galactic N_HI:	3.67×10²⁰ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	11^h 51^m 10.18^s	= 177.7924 d
Best Dec:	+78° 02′ 14.6″	= 78.0374 d

Gal Lat:	38.62
Gal Long:	126.89

Sun angle:	110.89°, 5.5 hr West

¹Sper #10 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 10 SPER messages, and 2 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 11 51 10.08 (78.0374)
- Dec (J2000): +78 02 14.7 ( 78.03731)
- Error (90%): 2.0
- Counts in Source: 920
- Object 2
- RA (J2000) : 11 52 02.87 ( 178.01194)
- Dec (J2000): +78 02 04.2 ( 78.03451)
- Error (90%): 6.334"
- Counts in Source: 15

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
0.2′′	177.79258	78.03736	GCN #14082	GRB121212A: NOT optical imaging
0.5′′	177.79292	78.03731	GCN #14069	GRB121212A: Swift/UVOT Detection
0.7′′	177.79152	78.03739	GCN #14066	GRB 121212A: Enhanced Swift-XRT position
1.0′′	177.79333	78.03758	GCN #14071	GRB 121212A: optical observations in ISON-NM observatory
1.0′′	177.79346	78.03758	GCN #14070	GRB 121212A: Keck observations
7.4′′	177.78252	78.03720	GCN #14064	GRB 121212A: Swift detection of a burst
21.5′′	177.77125	78.03336	GCN #14079	GRB 121212A: Maidanak optical observations
50.9′′	177.78667	78.05150	GCN #14068	GRB 121212A: Swift-BAT refined analysis

There are 14 matches in total. See the full table for details.

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
17.5	177.8092	78.0408	B1=19.8, R1=19.7	USNO-B1
21.9	177.7710	78.0332	B=20.2, R=19.3	APM-N
48.4	177.8271	78.0488	B=22.0, R=19.4	APM-N
60.4	177.8618	78.0460	I=18.7, R1=19.7	USNO-B1
75.3	177.8918	78.0337	I=18.7, R1=19.7	USNO-B1
84.8	177.8008	78.0609	B1=21.0, I=18.3	USNO-B1
94.5	177.9151	78.0439	B=19.5, R=18.3	APM-N
101.5	177.9276	78.0342	B=21.9, R=20.0	APM-N
104.1	177.8451	78.0106	B=21.4, R=20.0	APM-N
106.9	177.8020	78.0670	B=20.4, R=18.7	APM-N

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

There are 52 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
14.6	177.7840	78.0337	R1=19.4, R2=19.2	USNO-B1
15.3	177.7841	78.0335	B1=21.0, I=17.7, R1=19.9	USNO-B1
15.9	177.7837	78.0334	h=15.5, j=16.1, k=15.3	2MASS
21.4	177.7713	78.0334	B1=20.3, B2=20.6, R1=19.6, R2=19.4	USNO-B1
36.2	177.7439	78.0376	h=15.4, j=15.6, k=15.3	2MASS
36.2	177.7439	78.0377	B1=17.8, B2=17.3, I=16.0, R1=16.7, R2=16.7	USNO-B1
49.8	177.8287	78.0490	B2=21.8, R1=19.9	USNO-B1
59.0	177.8610	78.0455	h=15.8, j=16.6, k=15.5	2MASS
93.3	177.7923	78.0115	B1=17.9, I=18.2, R1=16.4, R2=20.5	USNO-B1
94.3	177.9149	78.0439	B1=19.5, B2=20.3, R1=18.9, R2=19.6	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 59 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.