Swift Trigger: 370846

Presumed name: GRB 090927

BAT	22^h 55^m 48.72^s, -70° 58′ 40.8″
position:	(343.953, -70.978 ± 180″)
XRT	22^h 55^m 53.70^s, -70° 58′ 44.7″
position:	(343.97377, -70.97907 ± 3.8″)
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.034 mag

Best RA:	22^h 55^m 53.70^s	= 343.97377 d
Best Dec:	-70° 58′ 44.7″	= -70.97907 d

Gal Lat:
Gal Long:

Sun angle:	not found

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

unknown 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
4.6′′	343.97291	-70.98032	GCN #9950	GRB 090927: Enhanced Swift-XRT position
4.7′′	343.97292	-70.98033	GCN #9952	GRB 090927: Swift XRT refined analysis
4.9′′	343.97254	-70.98036	GCN #9946	GRB 090927: Swift/UVOT detection of an optical afterglow
5.1′′	343.97258	-70.98043	GCN #9960	GRB 090927: Faulkes Telescope South Detection of the Optical Afterglow
23.9′′	343.95417	-70.97722	GCN #9945	GRB 090927: Swift detection of a short burst
56.6′′	343.92875	-70.97339	GCN #9955	GRB 090927� Swift-BAT refined analysis of the possibly short burst

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
4.9	343.9725	-70.9804	GRB 090927

* 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
4.7	343.9729	-70.9803		NED
36.9	343.9720	-70.9893	B=22.2, R2=20.6	SSS
46.8	343.9608	-70.9668	B=22.2	SSS
53.7	344.0115	-70.9875	B=22.0	SSS
56.3	343.9505	-70.9927	B=20.9, R2=19.3	SSS
56.7	343.9386	-70.9899	B=20.6, R2=19.6	SSS
61.0	343.9665	-70.9623	B=22.6	SSS
67.9	343.9274	-70.9678	B=21.2, R2=19.1, i=19.0	SSS
68.4	343.9256	-70.9684	I=19.6, R2=19.7	USNO-B1
70.4	343.9386	-70.9949	B=21.1, R2=20.4	SSS

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
10.1	343.9815	-70.9779	B2=21.2, R1=19.9, R2=20.1	USNO-B1
12.3	343.9817	-70.9768	B2=21.6, R2=19.8	USNO-B1
30.9	343.9480	-70.9808	B2=21.4, I=18.8, R1=19.9, R2=20.1	USNO-B1
32.5	343.9472	-70.9816	B2=20.6, R2=20.1	USNO-B1
35.4	343.9597	-70.9704	h=14.4, j=14.9, k=14.1	2MASS
35.5	343.9596	-70.9703	B2=18.1, I=15.6, R1=16.2, R2=16.0	USNO-B1
37.5	343.9725	-70.9895	B2=21.3, R2=20.1	USNO-B1
39.0	343.9728	-70.9899	B2=21.8, I=23.5, R1=20.5, R2=20.1	USNO-B1
45.4	343.9635	-70.9669	B2=21.5, R2=20.1	USNO-B1
45.9	344.0099	-70.9839	B2=15.2, I=13.7, R1=13.9, R2=14.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 116 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.