Swift Trigger: 539358

Presumed name: GRB 121123A

BAT	20^h 29^m 26.88^s, -11° 51′ 34.6″
position:	(307.362, -11.8596 ± 180″)
XRT	20^h 29^m 16.20^s, -11° 51′ 31.5″
position:	(307.31750, -11.85874 ± 3.6″)
UVOT	20^h 29^m 16.30^s, -11° 51′ 35.3″
position:	(307.3179, -11.8598 ± 0.7″)
Galactic N_HI:	4.01×10²⁰ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	20^h 29^m 16.30^s	= 307.3179 d
Best Dec:	-11° 51′ 35.3″	= -11.8598 d

Gal Lat:	-27.02
Gal Long:	33.05

Sun angle:	65.42°, -4.53 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

white image

Blink images with DSS (link via GSFC)

XRT SPER data

SPER results page for this trigger.

There are 4 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 20 29 16.20 ( 307.31750)
- Dec (J2000): -11 51 31.5 ( -11.85874)
- Error (90%): 3.581"
- Counts in Source: 220

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′′	307.31796	-11.85983	GCN #13982	GRB 121123A: Swift detection of a burst with optical counterpart
0.3′′	307.31792	-11.85989	GCN #14003	GRB 121123A: Swift/UVOT Observations
0.6′′	307.31787	-11.85996	GCN #13986	GRB 121123A: NOT optical observations
1.7′′	307.31813	-11.86022	GCN #13991	GRB 121123A: Enhanced Swift-XRT position
3.3′′	307.31830	-11.85898	GCN #13989	GRB 121123A: Swift-XRT refined Analysis
74.0′′	307.33400	-11.87300	GCN #13990	GRB 121123A: Swift-BAT refined analysis

There are 12 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
11.6	307.3213	-11.8592		NED
12.5	307.3210	-11.8591	h=0.0, j=15.3, k=14.1	2MASS
19.0	307.3132	-11.8555	B=21.9	SSS
21.3	307.3204	-11.8536	B2=21.4, R2=20.8	USNO-B1
23.6	307.3108	-11.8593	B=19.6, R2=18.3, i=17.9	SSS
25.1	307.3214	-11.8646	B2=20.9, I=18.7, R2=19.8	USNO-B1
30.5	307.3260	-11.8573	B=19.9, R2=18.8, i=18.0	SSS
31.5	307.3264	-11.8576	I=18.4, R1=19.2, R2=20.6	USNO-B1
37.0	307.3181	-11.8690	B1=19.9, B2=19.5, I=18.8, R2=18.8	USNO-B1
37.4	307.3259	-11.8650	B1=18.2, B2=17.9, I=17.3, R1=17.5, R2=17.3	USNO-B1

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

There are 86 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
13.1	307.3212	-11.8591	h=14.7, j=15.4, k=14.6	2MASS
13.2	307.3212	-11.8590	B2=21.2, I=17.1, R2=19.3	USNO-B1
15.7	307.3186	-11.8630	h=15.5, j=16.4, k=15.9	2MASS
15.8	307.3185	-11.8630	B1=19.0, B2=18.3, I=17.4, R1=17.9, R2=17.3	USNO-B1
18.7	307.3177	-11.8536	h=9.6, j=10.4, k=9.5	2MASS
18.9	307.3177	-11.8535	B1=14.6, B2=14.0, I=11.2, R1=12.5, R2=12.2	USNO-B1
22.5	307.3143	-11.8534	I=18.2, R2=19.9	USNO-B1
23.5	307.3109	-11.8593	h=15.9, j=17.2, k=15.5	2MASS
24.9	307.3105	-11.8593	B1=19.8, B2=18.8, I=16.6, R1=18.4, R2=17.6	USNO-B1
28.5	307.3178	-11.8508	B2=20.5, R2=19.3	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 275 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.