Swift Trigger: 868984

Presumed name: GRB 181027A

BAT	15^h 01^m 31.92^s, +30° 53′ 27.6″
position:	(225.383, +30.891 ± 180″)
XRT	No position available.
UVOT	No position available.
Galactic N_HI:	1.54×10⁰ cm^-2
Galactic E(B-V):	0.017 mag

Best RA:	15^h 01^m 31.92^s	= 225.383 d
Best Dec:	+30° 53′ 27.6″	= +30.891 d

Gal Lat:	61.41
Gal Long:	48.32

Sun angle:	45.63°, -0.9 hr East of Sun

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

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	Date reported	Source	Misc	Query
1.1′′	225.38333	30.89111		GCN #23383	GRB 181027A: Swift detection of a burst
178.2′′	225.36125	30.93683		GCN #23384	GRB 181027A: Swift-BAT refined analysis

Catalogue Searches. Searched 3.33′ around BAT 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
180.2	225.3703	30.8421	SDSSCGB 39645.3	G=20.5048, g=20.456, i=18.929, r=19.369, u=22.094, z=18.574
194.7	225.3666	30.8388	SDSSCGB 39645.1	g=19.070, i=17.863, r=18.301, u=20.125, z=17.653
199.1	225.3708	30.8367	SDSSCGB 39645

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
19.4	225.3893	30.8916	R=22.7, g=23.0, i=23.0, u=22.6, z=21.9	SDSS
19.4	225.3892	30.8917	Mag=23.0	NED
19.9	225.3775	30.8939	Mag=18.2	NED
23.1	225.3837	30.8847	Mag=18.9	NED
23.1	225.3836	30.8846	R=17.9, g=18.9, i=17.4, u=21.0, z=17.0	SDSS
23.2	225.3835	30.8846	B=20.5, R=17.8	APM-N
23.3	225.3836	30.8846	B=20.4, R=17.8	APM-N
24.1	225.3854	30.8847	Mag=21.1	NED
24.1	225.3853	30.8846	R=21.3, g=23.3, i=20.6, u=23.2, z=19.9	SDSS
24.6	225.3858	30.8975	Mag=25.7	NED

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

There are 472 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
18.9	225.3863	30.8866	I=21.6, R=23.0, g=24.1, u=25.4, z=21.2	SDSS
19.7	225.3889	30.8931	I=23.8, R=23.1, g=23.0, u=23.5, z=21.7	SDSS
19.8	225.3775	30.8939	h=16.3, j=16.6, k=16.2	2MASS
19.9	225.3776	30.8939	B1=17.9, B2=18.1, I=17.4, R1=17.9, R2=17.6	USNO-B1
19.9	225.3775	30.8939	I=17.7, R=17.8, g=18.2, u=19.3, z=17.6	SDSS
23.1	225.3836	30.8846	h=15.5, j=16.4, k=15.1	2MASS
23.2	225.3836	30.8846	B1=18.9, B2=18.2, I=16.8, R1=17.9, R2=17.1	USNO-B1
26.1	225.3914	30.8922	h=15.7, j=16.4, k=15.4	2MASS
26.2	225.3901	30.8871	I=22.7, R=23.3, g=23.3, u=23.7, z=21.8	SDSS
26.4	225.3914	30.8922	I=18.3, R=19.7, g=21.2, u=23.6, z=17.6	SDSS

Queried USNO-B1, SDSS, 2MASS.

There are 210 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.