Swift Trigger: 1215912

Presumed name: GRB 240218A

BAT	10^h 47^m 07.44^s, +01° 18′ 14.4″
position:	(161.781, +1.304 ± 180″)
XRT	10^h 47^m 11.36^s, +01° 16′ 45.8″
position:	(161.79732, 1.27938 ± 3.7″)
UVOT	No position available.
Galactic N_HI:	3.62×10²⁰ cm^-2
Galactic E(B-V):	0.046 mag

Best RA:	10^h 47^m 11.36^s	= 161.79732 d
Best Dec:	+01° 16′ 45.8″	= 1.27938 d

Gal Lat:	50.57
Gal Long:	248.63

Sun angle:	164.69°, 11.3 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.

There are 4 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 10 47 11.36 ( 161.79732)
- Dec (J2000): +01 16 45.8 ( 1.27938)
- Error (90%): 3.728"
- Counts in Source: 92

See the SPER page for details of how this position was produced.

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
37.3	161.7871	1.2777	SDSS J104708.90+011639.5	g=23.60, i=22.35, r=22.57, u=24.75, z=21.95
149.9	161.7602	1.2605	SDSS J104702.44+011537.8	g=20.981, i=19.708, r=20.266, u=21.44, z=19.63
185.5	161.7689	1.3224	SDSS J104704.53+011920.5	g=21.508, i=20.003, r=20.492, u=22.71, z=20.01
187.6	161.8437	1.3031	WiggleZ S11J104722499+01181104	g=22.51, i=21.58, r=21.65, z=20.85
192.6	161.8500	1.2700	WB 1044+0132
192.9	161.8289	1.2361	Gaia DR3 3808169212976277760	G=16.613323

There are 6 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
9.7	161.7969	1.2820	R=21.2, g=21.6, i=21.4, u=24.6, z=21.0	SDSS
9.7	161.7967	1.2819	Mag=21.5	NED
20.9	161.8012	1.2836		NED
22.0	161.7919	1.2821	R=20.7, g=21.6, i=20.5, u=22.5, z=20.4	SDSS
22.0	161.7917	1.2822	Mag=21.5	NED
28.6	161.7933	1.2725		NED
32.3	161.7892	1.2833	Mag=21.8	NED
32.3	161.7893	1.2835	R=21.8, g=22.8, i=21.6, u=26.4, z=21.5	SDSS
35.9	161.7921	1.2878		NED
36.2	161.8067	1.2758		NED

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

There are 439 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
22.1	161.7918	1.2822	B2=21.6, R2=20.7	USNO-B1
24.2	161.8001	1.2733	I=21.8, R=22.8, g=23.6, u=23.6, z=21.4	SDSS
37.3	161.7871	1.2777	I=22.2, R=22.4, g=23.4, u=24.5, z=21.7	SDSS
44.6	161.8067	1.2713	I=18.7, R1=19.9	USNO-B1
47.1	161.7845	1.2820	I=24.1, R=24.8, g=25.1, u=22.4, z=22.6	SDSS
50.1	161.7860	1.2875	I=21.4, R=22.5, g=23.0, u=23.2, z=20.7	SDSS
61.1	161.8141	1.2766	I=19.4, R=19.6, g=20.2, u=22.1, z=19.4	SDSS
63.4	161.7911	1.2959	B1=20.0, B2=20.7, I=18.8, R2=19.7	USNO-B1
66.7	161.8154	1.2755	I=21.7, R=24.1, g=24.8, u=23.7, z=21.9	SDSS
67.1	161.8160	1.2796	h=14.2, j=14.9, k=14.2	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 146 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.