Swift Trigger: 750298

Presumed name: GRB 170428A

BAT	22^h 00^m 15.12^s, +26° 55′ 03.0″
position:	(330.063, 26.9175 ± 180″)
XRT	No position available.
UVOT	No position available.
Galactic N_HI:	5.61×10⁰ cm^-2
Galactic E(B-V):	0.065 mag

Best RA:	22^h 00^m 15.12^s	= 330.063 d
Best Dec:	+26° 55′ 03.0″	= 26.9175 d

Gal Lat:	-22.08
Gal Long:	82.11

Sun angle:	62.10°, 4.4 hr West

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 3 SPER messges, but no object has been found.

See the SPER page for details of how the SPER image is searched for objects.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
1.6′′	330.06250	26.91750	GCN #21042	GRB 170428A: Swift detection of a short burst
40.6′′	330.05125	26.91331	GCN #21046	GRB 170428A: Swift-BAT refined analysis
48.9′′	330.07812	26.91581	GCN #21047	GRB 170428A: Swift-XRT refined Analysis
49.3′′	330.07823	26.91584	GCN #21050	GRB 170428A: GROND detection of the afterglow

Catalogue Searches. Searched 3.33′ around BAT 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
26.4	330.0698	26.9134	B1=20.9, I=18.0, R2=19.8	USNO-B1
30.1	330.0567	26.9118	B=21.7, R=20.0	APM-N
35.7	330.0657	26.9271	I=18.5, R1=20.1	USNO-B1
36.5	330.0564	26.9098	B=21.3, R=20.0	APM-N
36.6	330.0550	26.9103	B1=20.9, B2=20.9, R1=19.7, R2=19.9	USNO-B1
41.6	330.0671	26.9065	B2=21.0, I=18.5	USNO-B1
65.5	330.0811	26.9091	B2=21.2, R1=19.5, R2=19.8	USNO-B1
70.6	330.0664	26.8986	B=21.7, R=19.6	APM-N
74.6	330.0414	26.9098	I=17.7, R1=19.5, R2=19.8	USNO-B1
79.2	330.0829	26.9305	I=18.3, R1=20.1	USNO-B1

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

There are 73 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
18.4	330.0573	26.9173	I=18.6, R1=19.7	USNO-B1
27.3	330.0550	26.9149	B2=21.2, R1=19.7, R2=19.9	USNO-B1
37.3	330.0639	26.9072	B1=21.1, B2=21.2	USNO-B1
38.7	330.0522	26.9223	B1=19.9, B2=19.3, I=16.7, R1=17.9, R2=18.1	USNO-B1
50.8	330.0472	26.9194	h=13.6, j=14.4, k=13.4	2MASS
51.1	330.0472	26.9195	B1=19.8, B2=19.1, I=14.9, R1=16.8, R2=16.7	USNO-B1
53.8	330.0476	26.9234	B1=20.9, B2=21.2, I=18.5, R1=19.5, R2=19.5	USNO-B1
54.6	330.0563	26.9319	h=14.4, j=14.8, k=14.1	2MASS
55.2	330.0494	26.9081	B1=21.1, I=18.6, R2=19.9	USNO-B1
56.7	330.0563	26.9321	B1=17.9, B2=17.5, I=15.1, R1=15.8, R2=15.7	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 194 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.