Swift Trigger: 783479

Presumed name: GRB 171027A

BAT	04^h 06^m 43.27^s, -02° 36′ 21.6″
position:	(61.6803, -2.606 ± 180″)
XRT	04^h 06^m 45.79^s, -02° 37′ 20.3″
position:	(61.6908, -2.6223 ± 2.1″)
UVOT	No position available.
Galactic N_HI:	7.33×10⁰ cm^-2
Galactic E(B-V):	0.132 mag

Best RA:	04^h 06^m 45.79^s	= 61.6908 d
Best Dec:	-02° 37′ 20.3″	= -2.6223 d

Gal Lat:	-37.31
Gal Long:	193.92

Sun angle:	146.58°, 10.01 hr West

¹Sper #4 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

u image

white image

Blink images with DSS (link via GSFC)

XRT SPER data

SPER results page for this trigger.

There are 5 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 04 06 45.80 (-2.6223)
- Dec (J2000): -02 37 20.4 ( -2.62131)
- Error (90%): 2.1
- Counts in Source: 489

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′′	61.69075	-2.62233	GCN #22054	GRB 171027A: Prompt enhanced Swift-XRT position
0.8′′	61.69071	-2.62208	GCN #22062	GRB 171027A: Enhanced Swift-XRT position
1.4′′	61.69071	-2.62192	GCN #22057	GRB 171027A: RATIR Detection of a NIR Afterglow Candidate
5.7′′	61.68989	-2.62100	GCN #22053	GRB 171027A: Swift detection of a burst
81.6′′	61.68300	-2.60100	GCN #22066	GRB 171027A� Swift-BAT refined analysis

There are 11 matches in total. See the full table for details.

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
39.4	61.7012	-2.6189	IRAS 04042-0245

* 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
11.6	61.6938	-2.6212	B=21.5	SSS
15.2	61.6919	-2.6264	B=21.0, R2=19.7	SSS
15.8	61.6917	-2.6180	B=22.0	SSS
24.0	61.6975	-2.6223	B=21.9	SSS
27.2	61.6907	-2.6147	B=21.6, i=19.1	SSS
40.4	61.6796	-2.6232	B=22.1	SSS
80.7	61.7102	-2.6110	I=18.6, R1=18.6, R2=19.4	USNO-B1
81.1	61.7103	-2.6109	B=22.1, R2=20.0, i=17.8	SSS
84.3	61.6684	-2.6154	R1=19.0, R2=19.9	USNO-B1
85.1	61.6680	-2.6162	B=21.3, R2=20.1	SSS

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

There are 64 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
14.1	61.6919	-2.6261	B2=19.9, R1=19.0, R2=19.2	USNO-B1
14.2	61.6917	-2.6261	B1=19.6, B2=20.5, R1=19.3, R2=19.3	USNO-B1
18.4	61.6858	-2.6234	B1=20.3, R1=19.5	USNO-B1
23.7	61.6972	-2.6207	B1=19.6, R1=16.0	USNO-B1
27.8	61.6915	-2.6300	B1=20.6, I=19.2, R2=19.5	USNO-B1
47.7	61.6994	-2.6122	B1=20.2, B2=20.7, R1=18.6	USNO-B1
47.9	61.6775	-2.6209	B1=20.6, I=23.5	USNO-B1
58.7	61.6930	-2.6385	B1=19.6, B2=19.9, I=19.1, R1=18.9, R2=19.4	USNO-B1
81.1	61.7103	-2.6110	h=15.5, j=16.4, k=15.6	2MASS
86.8	61.6677	-2.6153	B1=20.0, B2=20.6, R2=19.9	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 93 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.