Swift Trigger: 843211

Presumed name: GRB 180620B

BAT	23^h 50^m 04.08^s, -57° 57′ 25.2″
position:	(357.517, -57.957 ± 180″)
XRT	23^h 50^m 05.09^s, -57° 57′ 46.1″
position:	(357.5212, -57.9628 ± 2.3″)
UVOT	23^h 50^m 05.09^s, -57° 57′ 43.9″
position:	(357.5212, -57.9622 ± 0.8″)
Galactic N_HI:	1.34×10⁰ cm^-2
Galactic E(B-V):	0.013 mag

Best RA:	23^h 50^m 05.09^s	= 357.5212 d
Best Dec:	-57° 57′ 43.9″	= -57.9622 d

Gal Lat:	-57.33
Gal Long:	318

Sun angle:	110.43°, 6.1 hr West

¹Sper #3 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

No UVOT images are currently available.

XRT SPER data

SPER results page for this trigger.

There are 3 SPER messages, and 1 objects have been found

- Object 1
- RA (J2000) : 23 50 05.18 ( 357.52160)
- Dec (J2000): -57 57 46.3 ( -57.96287)
- Error (90%): 3.715"
- Counts in Source: 151

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′′	357.52125	-57.96225	GCN #22807	GRB 180620B: Swift detection of a burst with an optical counterpart
0.8′′	357.52122	-57.96243	GCN #22814	GRB 180620B: Enhanced Swift-XRT position
32.6′′	357.51400	-57.95400	GCN #22821	GRB 180620B: 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
68.9	357.5571	-57.9608	LEDA 383688
83.9	357.4779	-57.9589	LEDA 383708
117.2	357.4988	-57.9931	UCAC2 6713406	B=13.37, H=10.626, I=11.66, J=11.017, K=10.538, R=12.34, V=12.57, g=12.93, i=12.08, r=12.30

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
12.5	357.5215	-57.9663	I=18.9, R2=24.1	USNO-B1
31.8	357.5362	-57.9583		NED
34.4	357.5033	-57.9614		NED
41.1	357.5217	-57.9742	I=18.9, R1=19.6, R2=20.0	USNO-B1
53.9	357.5232	-57.9777	B=22.0, R2=21.2	SSS
54.1	357.5025	-57.9508		NED
56.3	357.5396	-57.9500		NED
56.8	357.5184	-57.9785	B=21.6, R2=19.0, i=18.6	SSS
57.8	357.5181	-57.9788	B2=20.7, I=19.0, R2=20.0	USNO-B1
58.6	357.5187	-57.9783	Mag=19.1	NED

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

There are 86 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
32.5	357.5360	-57.9584	B2=19.3, I=16.4, R1=16.9, R2=17.1	USNO-B1
32.8	357.5362	-57.9584	h=14.7, j=15.3, k=14.4	2MASS
34.6	357.5033	-57.9614	h=16.1, j=16.7, k=15.8	2MASS
34.8	357.5032	-57.9614	B2=19.3, I=17.7, R1=17.1, R2=17.6	USNO-B1
55.2	357.5027	-57.9510	B2=20.6, I=17.8, R2=20.3	USNO-B1
55.7	357.5025	-57.9509	h=14.9, j=15.6, k=14.7	2MASS
56.0	357.5025	-57.9508	B2=20.6, I=17.6, R1=19.1, R2=19.8	USNO-B1
56.2	357.5182	-57.9783	B2=20.6, I=18.5, R2=19.9	USNO-B1
57.1	357.5184	-57.9786	B2=20.7, I=19.0, R1=19.1, R2=19.5	USNO-B1
58.0	357.5395	-57.9500	B2=20.4, I=18.4, R1=18.6, R2=19.1	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 80 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.