Swift Trigger: 650530

Presumed name: GRB 150727A

BAT	13^h 35^m 57.60^s, -18° 21′ 18.0″
position:	(203.990, -18.355 ± 180″)
XRT	13^h 35^m 52.92^s, -18° 19′ 33.2″
position:	(203.9705, -18.3259 ± 4.7″)
UVOT	13^h 35^m 52.51^s, -18° 19′ 31.1″
position:	(203.9688, -18.3253 ± 0.6″)
Galactic N_HI:	7.38×10⁰ cm^-2
Galactic E(B-V):	0.090 mag

Best RA:	13^h 35^m 52.51^s	= 203.9688 d
Best Dec:	-18° 19′ 31.1″	= -18.3253 d

Gal Lat:	43.29
Gal Long:	317.49

Sun angle:	84.75°, -5.2 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
0.2′′	203.96883	-18.32536	GCN #18084	GRB 150727A: Swift/UVOT Detection
0.3′′	203.96883	-18.32539	GCN #18089	GRB 150727A: RATIR Optical Observations
0.3′′	203.96883	-18.32539	GCN #18076	GRB 150727A: Swift detection of a burst with an optical counterpart
2.1′′	203.96842	-18.32575	GCN #18079	GRB 150727A: Enhanced Swift-XRT position
19.3′′	203.96800	-18.32000	GCN #18086	GRB 150727A: Swift-BAT refined analysis

Catalogue Searches. Searched 3.33′ around UVOT 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

* 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
21.8	203.9640	-18.3213	B=19.9, R2=18.8, i=18.6	SSS
21.9	203.9749	-18.3234	B2=20.1, R1=19.3	USNO-B1
37.8	203.9688	-18.3148	I=18.8, R2=19.5	USNO-B1
45.0	203.9560	-18.3283	B=22.1	SSS
48.4	203.9605	-18.3144	B=21.8, R2=19.8, i=18.5	SSS
48.4	203.9604	-18.3145	I=18.5, R2=19.9	USNO-B1
48.7	203.9823	-18.3208	B=20.7, R2=19.1, i=18.8	SSS
51.3	203.9835	-18.3222	B=18.5, R2=16.9, i=16.5	SSS
58.5	203.9639	-18.3097	B=19.9, R2=18.0, i=16.5	SSS
59.4	203.9706	-18.3417	B=21.6, R2=20.0, i=19.0	SSS

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

There are 98 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
9.4	203.9698	-18.3228	B2=20.5, I=18.6, R1=18.6, R2=19.4	USNO-B1
20.1	203.9744	-18.3236	B1=17.0, B2=17.7, I=16.7, R1=16.5, R2=16.8	USNO-B1
20.2	203.9745	-18.3237	h=15.5, j=15.9, k=15.3	2MASS
21.2	203.9642	-18.3214	B1=20.5, B2=19.6, I=18.8, R1=18.6, R2=19.0	USNO-B1
21.2	203.9667	-18.3308	B1=19.9, B2=21.7	USNO-B1
30.8	203.9764	-18.3208	B1=20.5, B2=15.5	USNO-B1
35.2	203.9771	-18.3312	B2=20.5, I=18.5, R2=19.3	USNO-B1
38.6	203.9779	-18.3316	B2=17.2, I=18.6, R2=19.6	USNO-B1
46.4	203.9803	-18.3321	B2=21.5, I=18.4, R2=19.3	USNO-B1
49.4	203.9825	-18.3209	B2=20.0, I=18.0, R1=19.3, R2=18.6	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 158 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.