Swift Trigger: 769567

Presumed name: GRB 170827A

BAT	18^h 24^m 43.20^s, -40° 13′ 12.0″
position:	(276.180, -40.220 ± 180″)
XRT	18^h 24^m 36.19^s, -40° 12′ 05.8″
position:	(276.1508, -40.2016 ± 4.9″)
UVOT	No position available.
Galactic N_HI:	8.75×10⁰ cm^-2
Galactic E(B-V):	0.102 mag

Best RA:	18^h 24^m 36.19^s	= 276.1508 d
Best Dec:	-40° 12′ 05.8″	= -40.2016 d

Gal Lat:	-12.41
Gal Long:	353.89

Sun angle:	119.56°, -8.0 hr East of Sun

¹Sper #0 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.

No SPER data received yet. Refresh this page to check again.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)	RA	Dec	Source	Misc
0.0′′	276.15080	-40.20160	GCN #21718	GRB 170827A: Swift detection of a burst
0.8′′	276.15058	-40.20175	GCN #21728	GRB 170827A: ePESSTO NTT afterglow candidate
104.4′′	276.18875	-40.20219	GCN #21724	GRB 170827A� 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
61.4	276.1419	-40.2172	TYC 7905-1180-1	B=12.99, H=9.067, J=9.668, K=8.98, V=12.04
145.5	276.1970	-40.1819	TYC 7905-882-1	B=11.99, H=6.087, J=6.938, K=5.834, V=10.61

* 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
17.5	276.1568	-40.2000	B=19.7, R2=18.4	SSS
19.5	276.1574	-40.1996	B2=17.6, R1=17.8, R2=17.5	USNO-B1
20.0	276.1575	-40.1995	B=19.6, R2=18.4, i=18.1	SSS
20.8	276.1483	-40.1962	B2=14.6, I=12.9, R1=13.9, R2=13.7	USNO-B1
22.8	276.1490	-40.1954	B=18.9	SSS
25.6	276.1544	-40.1951	B=19.9, R2=18.0, i=17.4	SSS
25.8	276.1546	-40.1950	R1=17.6, R2=18.7	USNO-B1
28.9	276.1504	-40.1936	B=21.0, R2=19.3, i=17.7	SSS
29.7	276.1525	-40.1935	B=19.9, R2=19.6	SSS
31.8	276.1449	-40.2092	I=15.8, R1=16.8, R2=17.8	USNO-B1

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

There are 184 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
5.2	276.1500	-40.2029	B2=17.9, R1=17.3, R2=17.6	USNO-B1
6.7	276.1531	-40.2022	h=15.7, j=16.6, k=16.5	2MASS
6.8	276.1532	-40.2021	B2=18.2, I=17.2, R1=17.5, R2=18.9	USNO-B1
8.4	276.1496	-40.2038	B2=18.7, R2=20.4	USNO-B1
12.3	276.1515	-40.1982	B2=16.9, I=16.0, R1=16.1, R2=16.9	USNO-B1
12.5	276.1514	-40.1982	h=15.6, j=15.9, k=15.3	2MASS
15.6	276.1475	-40.2051	B2=17.9, R1=17.2, R2=18.7	USNO-B1
15.9	276.1451	-40.2011	B2=18.0, R1=17.8, R2=19.2	USNO-B1
16.0	276.1474	-40.2052	h=15.7, j=16.3, k=15.3	2MASS
16.5	276.1568	-40.2020	B2=16.2, I=14.4, R1=15.0, R2=15.2	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 948 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.