Swift Trigger: 820513

Presumed name: GRB 180331B

BAT	13^h 07^m 16.80^s, +61° 43′ 30.0″
position:	(196.820, 61.725 ± 180″)
XRT	13^h 07^m 07.90^s, +61° 43′ 35.0″
position:	(196.7829, 61.7264 ± 2.0″)
UVOT	No position available.
Galactic N_HI:	1.52×10⁰ cm^-2
Galactic E(B-V):	0.016 mag

Best RA:	13^h 07^m 07.90^s	= 196.7829 d
Best Dec:	+61° 43′ 35.0″	= 61.7264 d

Gal Lat:	55.3
Gal Long:	119.67

Sun angle:	113.85°, 11.5 hr West

¹Sper #10 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) : 13 07 07.88 (61.7265)
- Dec (J2000): +61 43 35.3 ( 61.72626)
- Error (90%): 2.0
- Counts in Source: 212

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
1.0′′	196.78337	61.72625	GCN #22575	GRB 180331B: Enhanced Swift-XRT position
2.5′′	196.78296	61.72708	GCN #22573	GRB 180331B: Swift detection of a burst
30.9′′	196.78167	61.73497	GCN #22576	GRB 180331B: 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
146.0	196.8050	61.7656	SDSS J130713.20+614556.0	g=22.1, i=19.44, r=20.36, u=23.3, z=18.95
158.9	196.8014	61.7696	SDSS J130712.34+614610.7	g=21.12, i=18.296, r=19.287, u=22.7, z=17.85
162.5	196.7988	61.7709	[SPD2011] 15787

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
9.0	196.7789	61.7280	R=20.3, g=21.3, i=19.9, u=22.6, z=19.4	SDSS
9.0	196.7788	61.7281	Mag=21.2	NED
12.4	196.7812	61.7231	Mag=22.9	NED
12.4	196.7815	61.7230	R=21.5, g=22.8, i=20.5, u=26.7, z=20.1	SDSS
14.0	196.7750	61.7272	Mag=22.7	NED
15.9	196.7829	61.7308	R=22.1, g=23.0, i=21.9, u=22.8, z=22.0	SDSS
18.0	196.7884	61.7221	B2=21.3, I=18.1, R1=19.2, R2=19.3	USNO-B1
23.6	196.7693	61.7277	R=22.2, g=22.7, i=22.1, u=23.4, z=22.2	SDSS
23.6	196.7692	61.7278	Mag=22.7	NED
26.1	196.7946	61.7311	Mag=22.8	NED

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

There are 402 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
9.0	196.7790	61.7281	B2=21.6, I=18.7, R1=20.0, R2=19.9	USNO-B1
14.0	196.7749	61.7273	I=22.3, R=22.5, g=22.7, u=24.8, z=21.5	SDSS
18.2	196.7882	61.7220	h=15.9, j=16.4, k=15.7	2MASS
18.4	196.7883	61.7220	I=18.4, R=19.3, g=20.8, u=24.4, z=17.9	SDSS
30.8	196.7769	61.7345	I=20.5, R=20.6, g=20.7, u=21.0, z=20.4	SDSS
31.3	196.7767	61.7346	B1=20.7, B2=20.7, R1=20.2, R2=20.3	USNO-B1
32.8	196.7857	61.7354	B2=21.4, I=19.1, R1=20.0, R2=20.0	USNO-B1
33.3	196.7634	61.7273	I=22.1, R=22.7, g=23.7, u=23.3, z=22.2	SDSS
34.2	196.7960	61.7192	I=20.6, R=22.1, g=23.4, u=24.3, z=20.0	SDSS
38.5	196.7645	61.7326	I=17.0, R=17.1, g=17.4, u=18.5, z=16.9	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 166 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.