Swift Trigger: 1205319

Presumed name: GRB 231230A

BAT	16^h 20^m 47.28^s, +58° 07′ 12.0″
position:	(245.197, +58.120 ± 180″)
XRT	16^h 20^m 51.24^s, +58° 07′ 35.7″
position:	(245.21352, 58.12658 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	1.27×10²⁰ cm^-2
Galactic E(B-V):	0.012 mag

Best RA:	16^h 20^m 51.24^s	= 245.21352 d
Best Dec:	+58° 07′ 35.7″	= 58.12658 d

Gal Lat:	42.4
Gal Long:	88.45

Sun angle:	85.90°, 2.2 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 11 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 16 20 51.22 (58.12628)
- Dec (J2000): +58 07 34.6 ( 58.12454)
- Error (90%): 1.9
- Counts in Source: 311

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
50.0	245.2385	58.1310	SDSS J162057.22+580751.5	G=19.083839, g=19.5878, i=19.4610, r=19.5011, u=20.1438, z=19.4958
86.9	245.2400	58.1069	LEDA 2574626
90.1	245.2442	58.1075	LEDA 2574633

There are 3 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
5.9	245.2129	58.1283	Mag=22.3	NED
5.9	245.2130	58.1282	R=22.2, g=22.7, i=21.9, u=23.9, z=21.5	SDSS
11.0	245.2108	58.1239	Mag=23.9	NED
15.3	245.2168	58.1227	R=25.7, g=22.1, i=25.0, u=26.6, z=24.2	SDSS
17.3	245.2200	58.1300	Mag=23.4	NED
24.3	245.2060	58.1321	R=23.5, g=24.2, i=21.9, u=23.7, z=22.5	SDSS
24.9	245.2246	58.1303	R=22.5, g=23.6, i=22.7, u=23.7, z=21.6	SDSS
25.0	245.2246	58.1303	Mag=23.0	NED
25.8	245.2013	58.1297	Mag=24.5	NED
28.6	245.1991	58.1243	R=22.1, g=23.4, i=20.9, u=27.5, z=22.4	SDSS

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

There are 556 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
11.1	245.2107	58.1239	I=21.3, R=22.6, g=23.9, u=24.8, z=20.4	SDSS
17.3	245.2201	58.1299	I=21.9, R=22.3, g=23.4, u=25.3, z=21.2	SDSS
25.8	245.2012	58.1296	I=22.2, R=22.7, g=24.3, u=23.8, z=21.7	SDSS
31.2	245.2002	58.1316	I=23.8, R=22.8, g=24.9, u=23.9, z=22.0	SDSS
35.1	245.2320	58.1263	B1=21.0, B2=20.0, I=18.7, R1=19.6, R2=19.2	USNO-B1
37.8	245.2078	58.1366	I=21.8, R=25.1, g=25.1, u=24.8, z=22.7	SDSS
39.5	245.2338	58.1289	I=18.9, R=20.1, g=21.3, u=23.6, z=18.3	SDSS
42.1	245.2354	58.1249	I=19.5, R=19.9, g=21.1, u=22.7, z=19.2	SDSS
44.7	245.2344	58.1209	B2=20.6, I=18.5, R1=20.0, R2=19.7	USNO-B1
44.7	245.1940	58.1197	I=20.7, R=20.9, g=21.2, u=22.1, z=20.5	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.