Swift Trigger: 652603

Presumed name: GRB 150818A

BAT	15^h 21^m 47.04^s, +68° 20′ 31.2″
position:	(230.446, 68.342 ± 180″)
XRT	15^h 21^m 26.90^s, +68° 20′ 40.6″
position:	(230.3621, 68.3446 ± 6.1″)
UVOT	No position available.
Galactic N_HI:	2.30×10⁰ cm^-2
Galactic E(B-V):	0.024 mag

Best RA:	15^h 21^m 26.90^s	= 230.3621 d
Best Dec:	+68° 20′ 40.6″	= 68.3446 d

Gal Lat:	43.18
Gal Long:	104.99

Sun angle:	75.24°, -5.5 hr East of Sun

¹Sper #0 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.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.0′′	230.36210	68.34460	GCN #18152	GRB 150818A: Swift detection of a burst
0.1′′	230.36208	68.34458	GCN #18154	GRB 150818A: Planned XMM-Newton observation
10.3′′	230.35617	68.34278	GCN #18155	GRB 150818A: Swift/UVOT candidate afterglow
11.1′′	230.35596	68.34250	GCN #18161	GRB 150818A: Swift/UVOT Detection
11.3′′	230.35650	68.34222	GCN #18175	GRB 150818A: Mondy optical observations
12.3′′	230.35596	68.34206	GCN #18159	GRB 150818A: Enhanced Swift-XRT position
30.2′′	230.34042	68.34208	GCN #18157	GRB 150818A: Swift-BAT refined analysis

There are 11 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
7.4	230.3652	68.3429	B=20.6, R=20.0	APM-N
33.6	230.3576	68.3354	B=21.5, R=18.3	APM-N
34.2	230.3576	68.3352	B1=20.6, B2=20.7, I=17.6, R1=18.8, R2=19.0	USNO-B1
42.8	230.3889	68.3512	B=21.5, R=17.4	APM-N
46.9	230.3540	68.3573	B2=20.5, R2=20.1	USNO-B1
51.4	230.3235	68.3455	B=21.7, R=19.4	APM-N
60.1	230.3276	68.3338	B2=20.3, I=19.1, R2=20.1	USNO-B1
64.7	230.3474	68.3275	B2=20.7, I=18.3, R1=19.2, R2=19.7	USNO-B1
64.8	230.3479	68.3274	B=21.7, R=19.0	APM-N
65.5	230.3137	68.3478		NED

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

There are 66 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
8.3	230.3658	68.3428	B1=20.8, B2=20.7, R2=19.9	USNO-B1
34.3	230.3576	68.3352	h=15.3, j=16.3, k=15.4	2MASS
41.5	230.3697	68.3334	B2=20.7, I=18.7, R1=19.6, R2=19.4	USNO-B1
43.2	230.3889	68.3514	h=15.2, j=15.7, k=14.9	2MASS
43.4	230.3890	68.3514	B2=20.6, I=16.8, R1=17.8, R2=18.3	USNO-B1
46.6	230.3465	68.3562	B2=20.6, I=19.1, R1=19.6, R2=19.9	USNO-B1
57.7	230.3195	68.3478	B1=13.0, I=18.2, R1=11.2	USNO-B1
57.9	230.3199	68.3487	R1=19.7, R2=19.0	USNO-B1
59.5	230.3185	68.3483	I=18.4, R1=18.5, R2=17.4	USNO-B1
65.0	230.3139	68.3477	B1=12.8, B2=12.8, I=10.7, R1=11.2, R2=11.1	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 88 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.