Swift Trigger: 639278

Presumed name: GRB 150428B

BAT	19^h 30^m 36.96^s, +04° 06′ 57.6″
position:	(292.654, +4.116 ± 180″)
XRT	19^h 30^m 33.03^s, +04° 07′ 31.0″
position:	(292.63764, 4.12529 ± 3.7″)
UVOT	No position available.
Galactic N_HI:	1.97×10⁰ cm^-2
Galactic E(B-V):	0.358 mag

Best RA:	19^h 30^m 33.03^s	= 292.63764 d
Best Dec:	+04° 07′ 31.0″	= 4.12529 d

Gal Lat:	-6.77
Gal Long:	41.11

Sun angle:	100.91°, 6.8 hr West

¹Sper #1 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

No UVOT images are currently available.

XRT SPER data

SPER results page for this trigger.

There are 7 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 19 30 33.07 ( 292.63778)
- Dec (J2000): +04 07 31.4 ( 4.12539)
- Error (90%): 3.581"
- Counts in Source: 170

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
0.0′′	292.63764	4.12529	GCN #17766	GRB 150428B: Swift detection of a burst
6.4′′	292.63941	4.12505	GCN #17773	GRB 150428B: Enhanced Swift-XRT position
93.2′′	292.66100	4.11400	GCN #17776	GRB 150428B: 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

* 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
4.8	292.6365	4.1247	B1=17.0, B2=17.0, I=15.8, R1=15.6, R2=15.3	USNO-B1
9.8	292.6403	4.1259	R1=14.6, R2=13.8	USNO-B1
12.1	292.6406	4.1269	B1=16.4, B2=17.0, I=16.3, R1=15.5, R2=15.4	USNO-B1
13.2	292.6351	4.1226	B1=17.6, B2=17.9, I=16.8, R1=16.5, R2=16.1	USNO-B1
22.0	292.6370	4.1314	B2=18.8, R1=18.3, R2=17.6	USNO-B1
26.3	292.6403	4.1321	R1=19.4, R2=20.9	USNO-B1
27.3	292.6409	4.1321	R1=19.2, R2=19.8	USNO-B1
28.2	292.6331	4.1189	B1=18.9, B2=19.2, R1=18.3, R2=17.9	USNO-B1
31.6	292.6408	4.1171	B1=15.3, B2=15.9, I=15.1, R1=15.1, R2=14.4	USNO-B1
31.9	292.6390	4.1165	B1=18.4, B2=18.4, R2=17.1	USNO-B1

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

There are 525 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
5.0	292.6364	4.1246	h=13.9, j=14.6, k=13.8	2MASS
5.4	292.6376	4.1238	B1=17.7, B2=18.3, I=17.6, R1=17.0	USNO-B1
5.7	292.6376	4.1237	h=15.9, j=16.0, k=14.8	2MASS
8.4	292.6400	4.1254	h=13.6, j=13.9, k=13.4	2MASS
8.8	292.6401	4.1255	B1=15.0, B2=15.8, I=15.4, R1=14.6, R2=14.9	USNO-B1
9.8	292.6379	4.1280	B1=16.2, B2=16.8, I=15.8, R1=15.6, R2=15.4	USNO-B1
9.9	292.6379	4.1280	h=14.1, j=14.5, k=13.9	2MASS
12.8	292.6408	4.1269	h=15.1, j=15.6, k=14.8	2MASS
13.6	292.6351	4.1225	h=14.5, j=15.2, k=14.3	2MASS
16.5	292.6349	4.1290	R1=18.9, R2=19.8	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 1065 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.