Swift Trigger: 1091101

Presumed name: GRB 211227A

BAT	08^h 48^m 30.24^s, -02° 42′ 07.2″
position:	(132.126, -2.702 ± 180″)
XRT	08^h 48^m 35.75^s, -02° 44′ 08.2″
position:	(132.14894, -2.73560 ± 3.8″)
UVOT	No position available.
Galactic N_HI:	2.22×10²⁰ cm^-2
Galactic E(B-V):	0.022 mag

Best RA:	08^h 48^m 35.75^s	= 132.14894 d
Best Dec:	-02° 44′ 08.2″	= -2.73560 d

Gal Lat:	24.4
Gal Long:	229.87

Sun angle:	136.79°, 9.6 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) : 08 48 35.75 ( 132.14894)
- Dec (J2000): -02 44 08.2 ( -2.73560)
- Error (90%): 3.826"
- Counts in Source: 84

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	Source	Misc
0.2′′	132.14898	-2.73556	GCN #31316	GRB 211227A: Swift detection of a burst
1.1′′	132.14889	-2.73531	GCN #31322	GRB 211227A: Enhanced Swift-XRT position
3.7′′	132.14990	-2.73526	GCN #31320	GRB 211227A: Nanshan/NEXT optical observations and host galaxy candidate
17.8′′	132.14400	-2.73600	GCN #31326	GRB 211227A: Swift-BAT refined analysis
146.4′′	132.12600	-2.70200	GCN #31315	Swift GRB211227.98: Global MASTER-Net observations report

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		Query
115.0	132.1571	-2.7047	NVSS J084837-024216

* 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
4.3	132.1499	-2.7349	B=21.5, R=19.4	APM-N
11.5	132.1516	-2.7338	B=21.5, R=19.5	APM-N
11.8	132.1517	-2.7339		NED
15.3	132.1529	-2.7358		NED
17.9	132.1475	-2.7308		NED
18.1	132.1479	-2.7306		NED
18.6	132.1479	-2.7305	B=17.2, R=16.3	APM-N
19.1	132.1542	-2.7369		NED
28.6	132.1558	-2.7317		NED
30.9	132.1409	-2.7387	B2=20.7, R2=19.3	USNO-B1

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

There are 255 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
3.5	132.1499	-2.7354	B2=20.6, I=16.9, R1=19.0, R2=19.2	USNO-B1
4.1	132.1499	-2.7350	B1=19.8, B2=20.1, R2=18.7	USNO-B1
11.8	132.1518	-2.7340	h=16.0, j=16.8, k=15.6	2MASS
12.5	132.1519	-2.7338	B1=20.4, B2=20.7, R2=18.9	USNO-B1
13.4	132.1523	-2.7341	B1=20.1, R2=19.1	USNO-B1
17.9	132.1475	-2.7308	h=16.1, j=16.4, k=15.1	2MASS
18.2	132.1479	-2.7307	B2=16.7, I=16.9, R1=15.8, R2=15.9	USNO-B1
18.6	132.1481	-2.7305	B1=16.1, B2=16.2, I=16.5, R1=16.0, R2=15.4	USNO-B1
19.1	132.1541	-2.7370	h=11.6, j=11.8, k=11.6	2MASS
19.2	132.1541	-2.7370	B1=12.9, B2=12.8, I=12.1, R1=12.2, R2=12.4	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 185 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.