Swift Trigger: 373458

Presumed name: GRB 091020

BAT	11 42 51.6 +50 58 19.2
position:	(175.7150, 50.9720 +/-180")
XRT	11 42 55.2 +50 58 41.9
position:	(175.7300, 50.9783 +/-2.1")
UVOT
position:	(Unknown)
Galactic Nh:	cm^-2
Galactic E(B-V):	0.017 mag

Best RA:	11 42 55.2	= 175.7300 d
Best Dec:	+50 58 41.9	= 50.9783 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.

DSS - Blue DSS FITS file

2MASS - J 2MASS FITS file

UVOT data

unknown image
No trigger time found!
Exposure: 0 s

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
0.1′′	175.73000	50.97833	GCN #10054	GRB091020 Swift/UVOT observations
0.1′′	175.73000	50.97833	GCN #10054	GRB091020 Swift/UVOT observations
0.2′′	175.72992	50.97831	GCN #10048	GRB 091020: Swift detection of a burst with an optical afterglow
0.3′′	175.73004	50.97839	GCN #10050	GRB 091020: Enhanced Swift-XRT position
0.3′′	175.73005	50.97839	GCN #10050	GRB 091020: Enhanced Swift-XRT position
0.8′′	175.73028	50.97816	GCN #10088	Radio afterglow detection from GRB 091020
4.0′′	175.72840	50.97880	GCN #10048	GRB 091020: Swift detection of a burst with an optical afterglow
4.1′′	175.72837	50.97878	GCN #10048	GRB 091020: Swift detection of a burst with an optical afterglow
8.3′′	175.72700	50.97700	GCN #10051	GRB 091020� Swift-BAT refined analysis
9.2′′	175.72667	50.97683	GCN #10051	GRB 091020� Swift-BAT refined analysis
37.9′′	175.71667	50.97194	GCN #10048	GRB 091020: Swift detection of a burst with an optical afterglow

There are 13 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
0.1	175.7300	50.9783	GRB 091020
172.6	175.6590	50.9610	2MASS J11423814+5057396	B=19.8, H=13.48, I=15.5, J=14.08, K=13.26, R=18.0

* 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
0.2	175.7300	50.9783		NED
11.2	175.7337	50.9761	Mag=20.9	NED
11.3	175.7256	50.9797	B2=18.7, I=19.3	USNO-B1
18.2	175.7379	50.9783	Mag=21.9	NED
18.3	175.7381	50.9782	R=20.6, g=21.8, i=20.1, u=22.3, z=19.9	SDSS
23.8	175.7237	50.9728	Mag=23.1	NED
27.3	175.7326	50.9709	R=24.5, g=24.2, i=21.7, u=25.8, z=22.9	SDSS
29.0	175.7208	50.9842	Mag=23.3	NED
31.5	175.7163	50.9772	Mag=23.9	NED
31.5	175.7162	50.9773	R=21.7, g=24.6, i=20.7, u=24.6, z=20.0	SDSS

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

There are 426 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
7.8	175.7318	50.9801	I=21.3, R=23.2, g=25.6, u=25.8, z=20.4	SDSS
10.5	175.7334	50.9763	B1=20.6, B2=21.0, R1=20.2, R2=19.9	USNO-B1
11.2	175.7336	50.9762	I=20.5, R=20.6, g=20.9, u=21.5, z=20.3	SDSS
18.0	175.7379	50.9783	B2=20.4, R2=20.0	USNO-B1
23.8	175.7240	50.9729	I=21.8, R=22.1, g=23.1, u=23.2, z=21.3	SDSS
24.4	175.7194	50.9797	I=22.4, R=24.8, g=26.2, u=25.8, z=23.1	SDSS
28.3	175.7298	50.9862	I=22.1, R=24.0, g=25.7, u=24.9, z=23.6	SDSS
29.0	175.7211	50.9841	I=21.9, R=22.8, g=23.4, u=25.1, z=21.8	SDSS
30.1	175.7428	50.9805	I=18.3, R1=19.8	USNO-B1
35.7	175.7410	50.9712	B2=21.0, I=19.2, R1=19.7	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 166 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.