Swift Trigger: 1275005

Presumed name: GRB 241218A

BAT	12^h 22^m 43.68^s, +29° 59′ 27.6″
position:	(185.682, 29.991 ± 180″)
XRT	12^h 22^m 43.55^s, +29° 58′ 22.5″
position:	(185.68146, 29.97293 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	2.08×10²⁰ cm^-2
Galactic E(B-V):	0.022 mag

Best RA:	12^h 22^m 43.55^s	= 185.68146 d
Best Dec:	+29° 58′ 22.5″	= 29.97293 d

Gal Lat:	83.09
Gal Long:	186.96

Sun angle:	93.61°, 5.4 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 3 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 12 22 43.55 (29.97293)
- Dec (J2000): +29 58 22.5 ( 29.97397)
- Error (90%): 1.9
- Counts in Source: 82

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
74.0	185.6693	29.9553	2XMM J122240.6+295718	g=22.197, i=21.241, r=21.785, u=22.712, z=20.758
150.7	185.7072	30.0083	2XMM J122249.6+300031	g=21.866, i=21.203, r=21.515, u=22.079, z=20.885
187.9	185.6366	30.0077	SMDG J1222328+300028	g=21.6, r=20.9, z=20.6
190.7	185.7299	29.9406	2XMM J122255.2+295625	G=20.606644, H=15.554, J=16.163, K=15.197, g=18.192, i=16.956, r=17.374, u=19.944, z=16.648

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
47.0	185.6951	29.9784	0.00459949 +/- 0.00124455	XMM-NEWTON
47.1	185.6949	29.9788	0 +/- 0	CHANDRA
47.2	185.6951	29.9787	0.000524534378201 +/- 0.000206726050237	CHANDRA
47.3	185.6952	29.9785	0.00444681 +/- 0.00121247	XMM-NEWTON
48.2	185.6953	29.9789	0 +/- 0	CHANDRA
48.2	185.6891	29.9613	0 +/- 0	CHANDRA
73.6	185.6694	29.9554	0 +/- 0	CHANDRA
73.8	185.6694	29.9553	0.00851618969798 +/- 0.000824209524379	CHANDRA
73.8	185.6694	29.9553	0 +/- 0	CHANDRA
73.8	185.6693	29.9553	0 +/- 0	CHANDRA

Queried the X-ray MASTER catalogue.

There are 52 X-ray sources within the position error. The full list is here.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
11.1	185.6779	29.9733		NED
11.2	185.6850	29.9739		NED
13.2	185.6829	29.9764	Mag=25.5	NED
16.5	185.6762	29.9736	Mag=23.5	NED
23.9	185.6750	29.9692	Mag=24.5	NED
24.8	185.6869	29.9679	I=15.5, R2=18.5	USNO-B1
25.8	185.6867	29.9675	Mag=20.3	NED
31.8	185.6725	29.9772		NED
35.8	185.6717	29.9678	B=21.8, R=20.0	APM-N
37.6	185.6721	29.9794		NED

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

There are 380 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
13.2	185.6832	29.9763	I=23.7, R=22.7, g=25.4, u=25.9, z=23.0	SDSS
16.5	185.6762	29.9736	I=22.7, R=22.5, g=23.5, u=25.1, z=21.4	SDSS
23.6	185.6870	29.9684	B2=19.6, R1=19.0	USNO-B1
23.9	185.6752	29.9691	I=21.8, R=22.1, g=24.3, u=24.7, z=21.2	SDSS
25.1	185.6868	29.9677	h=14.1, j=14.8, k=13.9	2MASS
25.5	185.6869	29.9676	I=17.2, R=18.9, g=20.3, u=22.8, z=16.2	SDSS
51.3	185.6723	29.9611	B2=20.6, R2=20.6	USNO-B1
51.8	185.6810	29.9873	I=22.0, R=22.7, g=22.8, u=22.2, z=22.3	SDSS
52.5	185.6827	29.9584	B2=21.3, I=18.1, R2=20.1	USNO-B1
52.9	185.6827	29.9583	I=19.4, R=20.1, g=21.6, u=23.3, z=19.1	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 110 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.