Swift Trigger: 1257556

Presumed name: GRB 241002A

BAT	09^h 23^m 49.20^s, +39° 51′ 14.4″
position:	(140.955, +39.854 ± 180″)
XRT	09^h 23^m 48.00^s, +39° 49′ 56.6″
position:	(140.9500, 39.8324 ± 5.8″)
UVOT	No position available.
Galactic N_HI:	1.30×10²⁰ cm^-2
Galactic E(B-V):	0.014 mag

Best RA:	09^h 23^m 48.00^s	= 140.9500 d
Best Dec:	+39° 49′ 56.6″	= 39.8324 d

Gal Lat:	45.54
Gal Long:	182.57

Sun angle:	61.33°, 3.1 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.

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	Date reported	Source	Misc	Query

Catalogue Searches. Searched 200′ 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
144.7	140.9318	39.8701	Gaia DR3 812454400468706176	G=20.563122
147.9	140.9842	39.8008	LEDA 2155877
176.2	140.9380	39.7843	SDSS J092345.10+394703.7	G=21.797361, g=20.73, i=19.06, r=19.47, u=22.5, z=18.72
176.6	140.8933	39.8098	SDSS J092334.39+394835.2	G=19.941965, g=20.2615, i=20.0575, r=19.9965, u=20.3688, z=20.1644
184.8	140.8875	39.8506	2MASS J09233299+3951021	H=15.936, J=16.416, K=15.376
198.4	141.0002	39.7930	TYC 2991-463-1	B=12.53, G=11.472816, H=9.862, J=10.249, K=9.761, V=11.19
199.2	140.9931	39.7881	2MASS J09235834+3947170	H=10.909, J=11.545, K=10.719, V=14.303
199.4	140.9932	39.7881	SDSS J092358.37+394717.0	g=15.456, i=13.224, r=14.020, u=18.02, z=12.793

There are 8 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
180.6	140.9248	39.7861	0 +/- 0	ROSAT
180.6	140.9248	39.7861	0.0273 +/- 0.011	ROSAT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
4.1	140.9486	39.8322	B=21.8, R=20.0	APM-N
7.3	140.9475	39.8317		NED
8.4	140.9496	39.8347	R=22.4, g=22.7, i=21.2, u=22.7, z=20.7	SDSS
8.4	140.9496	39.8347	R=21.9, g=22.5, i=21.5, u=23.1, z=21.4	SDSS
15.7	140.9446	39.8336		NED
16.0	140.9445	39.8338	B=21.2, R=20.0	APM-N
17.9	140.9439	39.8340	R=23.0, g=22.7, i=22.2, u=23.8, z=21.9	SDSS
19.4	140.9467	39.8278	Mag=22.0	NED
25.8	140.9529	39.8392	Mag=23.1	NED
25.8	140.9531	39.8392	R=21.3, g=22.5, i=21.3, u=23.4, z=24.2	SDSS

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

There are 446 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
14.4	140.9450	39.8314	I=22.0, R=22.5, g=24.3, u=23.8, z=22.9	SDSS
18.7	140.9467	39.8279	I=19.0, R1=19.6, R2=20.1	USNO-B1
19.4	140.9466	39.8277	I=20.8, R=21.1, g=21.9, u=23.0, z=20.9	SDSS
25.1	140.9566	39.8277	I=18.7, R1=19.8, R2=20.4	USNO-B1
26.6	140.9569	39.8273	I=19.8, R=20.7, g=22.3, u=23.9, z=19.3	SDSS
32.8	140.9441	39.8245	I=21.6, R=22.5, g=23.2, u=23.0, z=21.4	SDSS
35.8	140.9440	39.8412	I=22.8, R=23.2, g=22.8, u=25.1, z=22.1	SDSS
35.9	140.9441	39.8413	I=23.2, R=23.0, g=23.4, u=23.7, z=22.2	SDSS
44.8	140.9634	39.8394	I=22.2, R=22.3, g=22.9, u=24.7, z=21.2	SDSS
52.0	140.9575	39.8457	I=23.3, R=22.7, g=23.0, u=24.8, z=22.2	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 213 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.