Swift Trigger: 1205744

Presumed name: GRB 240101B

BAT	23^h 28^m 12.48^s, +51° 38′ 42.0″
position:	(352.052, +51.645 ± 180″)
XRT	23^h 28^m 23.18^s, +51° 38′ 16.4″
position:	(352.0966, 51.6379 ± 5.1″)
UVOT	No position available.
Galactic N_HI:	1.80×10²¹ cm^-2
Galactic E(B-V):	0.246 mag

Best RA:	23^h 28^m 23.18^s	= 352.0966 d
Best Dec:	+51° 38′ 16.4″	= 51.6379 d

Gal Lat:	-9.15
Gal Long:	110.06

Sun angle:	96.68°, -4.7 hr East of Sun

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.

There are 3 SPER messges, but no object has been found.

See the SPER page for details of how the SPER image is searched for objects.

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
32.0	352.1107	51.6364	2MASX J23282660+5138115	G=19.732115, H=12.052, J=12.768, K=11.612
111.5	352.0521	51.6519	LEDA 2397669
153.1	352.0580	51.6730	TYC 3649-826-1	B=13.35, G=11.450421, H=8.6, J=9.342, K=8.459, V=12.02
189.5	352.1811	51.6337	TYC 3649-618-1	B=13.48, G=12.065500, V=12.35

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*	Redshift		Catalogue
19.3	352.0946	51.6328			NED
25.4	352.1079	51.6389			NED
30.9	352.1067	51.6320		B2=19.8, R2=17.7	USNO-B1
31.1	352.1067	51.6436			NED
31.5	352.1067	51.6317			NED
31.7	352.0933	51.6294			NED
32.1	352.1108	51.6364	0.045445	Mag=11.5	NED
32.2	352.1108	51.6365		h=12.2, j=13.0, k=11.8	2MASS
37.8	352.0819	51.6431		B2=20.4, R1=19.2, R2=19.3	USNO-B1
38.0	352.0886	51.6472		B2=20.0, I=18.6, R1=18.3, R2=18.8	USNO-B1

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

There are 332 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
11.2	352.1002	51.6401	B1=20.9, B2=19.1, I=18.6, R1=19.1, R2=18.9	USNO-B1
19.2	352.0948	51.6327	h=15.7, j=16.1, k=15.7	2MASS
19.5	352.0946	51.6326	B1=18.6, B2=17.6, I=16.9, R1=17.1, R2=16.9	USNO-B1
21.3	352.1035	51.6420	B1=20.1, B2=19.9, I=18.5, R1=18.9, R2=18.4	USNO-B1
25.4	352.1079	51.6388	h=13.5, j=13.9, k=13.4	2MASS
26.7	352.1085	51.6384	B1=15.8, B2=14.2, I=12.5, R1=13.6, R2=13.0	USNO-B1
29.0	352.0837	51.6389	B1=19.7, B2=18.6, I=18.1, R1=18.1, R2=17.9	USNO-B1
31.1	352.1069	51.6437	h=14.2, j=14.6, k=14.1	2MASS
31.3	352.1068	51.6438	B1=17.2, B2=16.3, I=15.3, R1=15.6, R2=15.6	USNO-B1
31.3	352.0935	51.6294	B1=18.6, B2=17.5, I=17.0, R1=17.0, R2=16.9	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 385 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.