Swift Trigger: 433065

Presumed name: GRB 100901A

BAT	01^h 48^m 58.70^s, +22° 44′ 39.5″
position:	(27.2446, 22.7443 ± 180″)
XRT	01^h 49^m 03.41^s, +22° 45′ 30.2″
position:	(27.2642, 22.7584 ± 3.0″)
UVOT	No position available.
Galactic N_HI:	0.00×10⁰ cm^-2
Galactic E(B-V):	0.099 mag

Best RA:	01^h 49^m 03.41^s	= 27.2642 d
Best Dec:	+22° 45′ 30.2″	= 22.7584 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
0.0′′	27.26420	22.75840	GCN #11159	GRB 100901A: Swift detection of a burst with an optical afterglow
0.6′′	27.26438	22.75847	GCN #11173	GRB 100901A: THO optical observations
1.6′′	27.26371	22.75833	GCN #11162	GRB 100901A: confirmation of the afterglow
2.1′′	27.26483	22.75850	GCN #11167	GRB 100901A: Enhanced Swift-XRT position
48.5′′	27.25200	22.75100	GCN #11169	GRB 100901A: Swift-BAT refined analysis
48.8′′	27.27331	22.74777	GCN #11236	GRB 100901A: TLS observations� SDSS calibration� decay slope
48.8′′	27.27329	22.74774	GCN #11208	GRB 100901A: UKIRT zYJHK Observation
104.1′′	27.27825	22.78425	GCN #11166	GRB 100901A: optical observation at Mt.Terskol
104.1′′	27.27825	22.78425	GCN #11168	GRB 100901A: optical observation at Mt.Terskol

There are 19 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
2.1	27.2648	22.7585	GRB 100901A
48.5	27.2732	22.7478	USNO-B1.0 1127-00027229	B=18.1, R=16.4
104.1	27.2782	22.7842	USNO-B1.0 1127-00027231	B=16.4, R=15.4
128.5	27.2263	22.7512	USNO-B1.0 1127-00027192	B=19.7, R=17.6

There are 4 SIMBAD objects within the position error. The full list is here.

* 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
0.6	27.2642	22.7586		NED
16.3	27.2691	22.7590	I=18.9, R1=20.1	USNO-B1
28.8	27.2582	22.7642	B=21.2, R=18.0	APM-N
29.5	27.2589	22.7649	I=18.6, R1=18.9, R2=18.7	USNO-B1
43.0	27.2513	22.7578	B=21.4, R=19.7	APM-N
67.6	27.2562	22.7757	B=20.3, R=20.0	APM-N
70.9	27.2465	22.7695	B=21.4, R=19.7	APM-N
71.8	27.2537	22.7758	B=20.9, R=20.0	APM-N
85.6	27.2864	22.7705	B=21.4, R=20.0	APM-N
91.5	27.2848	22.7753	B=21.4, R=20.0	APM-N

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

There are 42 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
28.8	27.2587	22.7646	B2=19.8, R1=18.2, R2=18.2	USNO-B1
29.0	27.2582	22.7643	B1=20.5, B2=19.6, I=17.2, R1=17.9, R2=17.5	USNO-B1
29.0	27.2580	22.7641	h=16.0, j=16.8, k=15.5	2MASS
48.5	27.2732	22.7478	B1=18.5, B2=18.1, I=15.8, R1=16.2, R2=16.4	USNO-B1
48.8	27.2733	22.7477	h=14.2, j=14.9, k=14.0	2MASS
72.2	27.2859	22.7600	B1=20.9, R1=20.2	USNO-B1
72.4	27.2479	22.7718	h=15.2, j=15.4, k=15.0	2MASS
72.7	27.2479	22.7719	B1=16.7, B2=17.0, I=16.0, R1=15.9, R2=16.1	USNO-B1
86.3	27.2882	22.7491	B1=19.8, B2=20.7, I=18.8, R2=19.9	USNO-B1
103.7	27.2782	22.7841	h=14.1, j=14.5, k=13.9	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 79 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.