Swift Trigger: 813721

Presumed name: GRB 180311A

BAT	00^h 13^m 43.92^s, -54° 28′ 44.4″
position:	(3.433, -54.479 ± 180″)
XRT	00^h 13^m 33.02^s, -54° 29′ 29.0″
position:	(3.3876, -54.4914 ± 2.1″)
UVOT	No position available.
Galactic N_HI:	1.53×10⁰ cm^-2
Galactic E(B-V):	0.014 mag

Best RA:	00^h 13^m 33.02^s	= 3.3876 d
Best Dec:	-54° 29′ 29.0″	= -54.4914 d

Gal Lat:	-61.77
Gal Long:	314.59

Sun angle:	51.76°, -0.8 hr East of Sun

¹Sper #5 auto processing.

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

white image

Blink images with DSS (link via GSFC)

XRT SPER data

SPER results page for this trigger.

There are 10 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 00 13 32.93 (-54.4913)
- Dec (J2000): -54 29 28.6 ( -54.49174)
- Error (90%): 2.1
- Counts in Source: 188

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′′	3.38762	-54.49144	GCN #22470	GRB 180311A: Enhanced Swift-XRT position
0.8′′	3.38721	-54.49139	GCN #22469	GRB 180311A: Prompt enhanced Swift-XRT position
5.6′′	3.39025	-54.49161	GCN #22468	GRB 180311A: Swift detection of a burst
17.8′′	3.37917	-54.49072	GCN #22474	GRB 180311A� Swift-BAT refined analysis

Catalogue Searches. Searched 3.33′ 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
153.8	3.4569	-54.5058	TYC 8464-307-1	B=12.57, G=11.519, H=10.014, J=10.393, K=9.896, V=11.95

* 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
28.4	3.3918	-54.4989	B=21.7	SSS
29.0	3.3912	-54.4992		NED
30.4	3.3994	-54.4865	B=21.4, R2=20.9	SSS
42.3	3.3677	-54.4935	B=22.3	SSS
62.8	3.4113	-54.4808	Mag=19.99	NED
65.8	3.4142	-54.4817	B=20.1, R2=19.1	SSS
66.5	3.4146	-54.4817	Mag=19.0	NED
71.3	3.3669	-54.4757	B=20.7	SSS
72.4	3.4217	-54.4880	B2=20.4, R2=23.4	USNO-B1
73.0	3.3649	-54.4760	B=21.0	SSS

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

There are 61 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
10.3	3.3863	-54.4942	R1=20.4, R2=20.7	USNO-B1
43.6	3.3979	-54.4809	B2=20.2, R2=21.8	USNO-B1
65.7	3.4142	-54.4817	B2=20.0, R1=19.4, R2=19.7	USNO-B1
81.2	3.4263	-54.4933	B2=19.2, I=18.5, R1=18.5, R2=18.7	USNO-B1
83.5	3.4275	-54.4903	B2=21.6, I=18.8, R1=19.8, R2=20.1	USNO-B1
84.7	3.3521	-54.5027	R1=20.1, R2=20.7	USNO-B1
91.2	3.4306	-54.4873	B2=21.1, I=18.8, R1=19.5, R2=19.2	USNO-B1
92.2	3.3532	-54.5074	I=18.7, R2=16.6	USNO-B1
92.7	3.3552	-54.5090	h=15.4, j=16.2, k=15.2	2MASS
92.9	3.3547	-54.5088	B2=20.3, I=16.3, R1=18.9	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 69 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.