Swift Trigger: 554635

Presumed name: GRB 130427B

BAT	20^h 59^m 33.84^s, -22° 31′ 48.0″
position:	(314.891, -22.530 ± 180″)
XRT	20^h 59^m 35.76^s, -22° 32′ 46.7″
position:	(314.8990, -22.5463 ± 2.2″)
UVOT	20^h 59^m 35.62^s, -22° 32′ 46.3″
position:	(314.8984, -22.5462 ± 1.1″)
Galactic N_HI:	4.40×10²⁰ cm^-2
Galactic E(B-V):	NED unavailable

Best RA:	20^h 59^m 35.62^s	= 314.8984 d
Best Dec:	-22° 32′ 46.3″	= -22.5462 d

Gal Lat:	-37.65
Gal Long:	24.37

Sun angle:	86.38°, 5.3 hr West

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 6 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 20 59 35.77 (-22.5464)
- Dec (J2000): -22 32 47.1 ( -22.54609)
- Error (90%): 2.1
- Counts in Source: 270

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
0.4′′	314.89850	-22.54625	GCN #14460	GRB 130427B: Swift detection of a burst with optical counterpart
0.6′′	314.89842	-22.54636	GCN #14461	GRB 130427B: Faulkes Telescope North afterglow detection
1.8′′	314.89850	-22.54669	GCN #14467	GRB 130427B: Enhanced Swift-XRT position
7.5′′	314.90000	-22.54767	GCN #14469	GRB 130427B: Swift-BAT refined analysi

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
7.5	314.8982	-22.5443	B2=20.8, R2=19.6	USNO-B1
30.9	314.8902	-22.5435	B2=20.6, I=18.5, R1=19.3, R2=20.1	USNO-B1
40.9	314.8968	-22.5351	I=18.6, R2=19.9	USNO-B1
45.0	314.9117	-22.5467	Mag=19.3	NED
48.1	314.8934	-22.5586	B1=19.7, B2=21.8, I=18.8	USNO-B1
91.4	314.8837	-22.5252	B2=21.5, R1=19.9	USNO-B1
92.9	314.8704	-22.5467	Mag=18.3	NED
106.6	314.9234	-22.5655	B2=21.7, I=18.5, R1=19.8, R2=20.1	USNO-B1
110.1	314.8761	-22.5242	B2=21.1, R2=20.1	USNO-B1
117.8	314.9125	-22.5160	B2=21.8, I=18.0, R1=19.9, R2=20.3	USNO-B1

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

There are 29 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
5.9	314.8990	-22.5479	B1=16.7, B2=16.4, I=15.9, R1=16.2, R2=16.0	USNO-B1
6.0	314.8990	-22.5480	h=15.1, j=15.4, k=15.1	2MASS
28.4	314.9049	-22.5406	B2=21.9, I=18.7, R1=19.7, R2=20.4	USNO-B1
29.5	314.9033	-22.5392	B1=17.2, B2=17.2, I=14.7, R1=15.7, R2=15.6	USNO-B1
29.6	314.9033	-22.5391	h=13.1, j=13.7, k=12.9	2MASS
32.5	314.8895	-22.5442	B1=20.4, B2=21.2, I=18.9	USNO-B1
32.8	314.8897	-22.5433	B2=20.8, R1=19.6	USNO-B1
32.8	314.8983	-22.5554	B2=21.0, R1=19.9, R2=20.4	USNO-B1
42.6	314.9118	-22.5463	h=16.4, j=16.7, k=16.2	2MASS
42.7	314.9118	-22.5464	B2=20.2, I=18.0, R1=19.5, R2=19.4	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 148 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.