Swift Trigger: 1270788

Presumed name: GRB 241127A

BAT	21^h 51^m 41.28^s, -56° 41′ 06.0″
position:	(327.922, -56.685 ± 180″)
XRT	21^h 51^m 32.05^s, -56° 39′ 52.5″
position:	(327.88355, -56.66459 ± 4.0″)
UVOT	No position available.
Galactic N_HI:	2.46×10²⁰ cm^-2
Galactic E(B-V):	0.028 mag

Best RA:	21^h 51^m 32.05^s	= 327.88355 d
Best Dec:	-56° 39′ 52.5″	= -56.66459 d

Gal Lat:	-46.63
Gal Long:	337.38

Sun angle:	69.12°, -5.6 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 2 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 21 51 32.05 ( 327.88355)
- Dec (J2000): -56 39 52.5 ( -56.66459)
- Error (90%): 3.973"
- Counts in Source: 33

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
44.6	327.8621	-56.6608	APMCC 719
52.5	327.8581	-56.6687	LEHPM 4252	G=19.111219
73.4	327.9127	-56.6520	Gaia DR3 6460460673880109696	G=20.692404
84.1	327.9241	-56.6716	PMN J2151-5640
91.8	327.8401	-56.6735	Gaia DR3 6460460948759909760	G=20.613592
119.2	327.8636	-56.6334	Gaia DR3 6460461120558601472	G=20.217461
133.4	327.9459	-56.6787	UCAC4 167-205185	B=14.417, G=13.177428, H=11.124, J=11.736, K=11.060, R=13.263, V=13.475, g=13.965, i=12.842, r=13.124
157.0	327.8958	-56.7077	TYC 8816-490-1	B=13.14, G=11.759126, H=10.087, J=10.484, K=9.993, V=11.67
173.9	327.8012	-56.6477	Gaia DR3 6460461257997555456	G=20.657862
183.4	327.8613	-56.7140	UCAC2 7184670	B=12.943, G=11.996646, H=10.364, I=11.33, J=10.815, K=10.304, R=12.13, V=12.175, g=12.522, i=11.775, r=11.961

There are 11 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
89.3	327.9258	-56.6733	0.0656627044 +/- 0.03068584017	SRG-EROSIT

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

¹Energy band for count-rate is mission specific.

Galaxies

	RA*	Dec*		Catalogue
6.1	327.8808	-56.6639		NED
8.4	327.8801	-56.6660	I=18.9, R2=24.3	USNO-B1
10.1	327.8787	-56.6655	B=22.2, R2=20.7	SSS
10.9	327.8846	-56.6675		NED
14.9	327.8796	-56.6611		NED
18.5	327.8883	-56.6690	B=21.9, R2=20.2	SSS
18.6	327.8755	-56.6619	B2=20.9, I=19.6, R2=20.7	USNO-B1
23.5	327.8742	-56.6606	B2=20.7, R1=19.7, R2=20.0	USNO-B1
23.7	327.8741	-56.6605	B=21.3, R2=20.3	SSS
24.5	327.8733	-56.6606		NED

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

There are 362 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
6.2	327.8807	-56.6639	B2=23.1, R1=19.8, R2=23.6	USNO-B1
16.6	327.8774	-56.6615	B2=20.9, I=19.2, R2=20.1	USNO-B1
16.9	327.8880	-56.6686	B2=20.7, R2=21.2	USNO-B1
24.8	327.8738	-56.6602	B2=20.8, R1=19.8, R2=20.6	USNO-B1
26.9	327.8972	-56.6643	B2=20.8, R2=20.1	USNO-B1
29.1	327.8727	-56.6701	B2=21.1, I=18.9, R1=19.4, R2=19.8	USNO-B1
41.1	327.8675	-56.6718	B2=18.0, I=16.8, R1=16.4, R2=16.6	USNO-B1
41.1	327.8754	-56.6751	B2=20.9, R2=20.1	USNO-B1
41.2	327.8673	-56.6718	h=14.5, j=15.2, k=14.5	2MASS
44.2	327.8857	-56.6524	B2=20.8, R2=20.0	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 232 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.