Swift Trigger: 1405083

Presumed name: GRB 251018A

BAT	18^h 48^m 17.04^s, -37° 01′ 40.8″
position:	(282.071, -37.028 ± 180″)
XRT	18^h 48^m 10.99^s, -37° 01′ 38.4″
position:	(282.04580, -37.02733 ± 4.7″)
UVOT	No position available.
Galactic N_HI:	6.98×10²⁰ cm^-2
Galactic E(B-V):	0.096 mag

Best RA:	18^h 48^m 10.99^s	= 282.04580 d
Best Dec:	-37° 01′ 38.4″	= -37.02733 d

Gal Lat:	-15.34
Gal Long:	358.8

Sun angle:	75.72°, -5.3 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

SPER results page for this trigger.

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

- Object 1
- RA (J2000) : 18 48 10.91 ( 282.04547)
- Dec (J2000): -37 01 39.8 ( -37.02773)
- Error (90%): 5.054"
- Counts in Source: 13

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	Date reported	Source	Misc	Query

Catalogue Searches. Searched 200′ 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
29.3	282.0430	-37.0195	Gaia DR3 6730315599405620352	G=18.282562
119.6	282.0050	-37.0208	IRAS 18446-3704	G=13.507676, H=7.42, J=8.57, K=6.678
138.3	282.0907	-37.0135	HD 173712	B=8.34, G=6.453338, H=3.810, J=4.736, K=3.758, V=6.93
176.8	281.9847	-37.0333	Gaia DR3 6730314804825669888	G=18.576752
197.2	282.0701	-36.9761	Gaia DR3 6730316046082352640	G=14.977795

There are 5 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
13.9	282.0425	-37.0245	I=16.9, R1=17.2, R2=16.9	USNO-B1
19.4	282.0524	-37.0263	B2=17.2, I=14.5, R1=16.6, R2=16.5	USNO-B1
31.7	282.0545	-37.0220	B2=18.0, I=17.0, R1=17.4, R2=17.8	USNO-B1
39.7	282.0521	-37.0371	B2=19.1, R1=18.0, R2=19.3	USNO-B1
40.3	282.0338	-37.0216	B2=18.8, R1=18.1, R2=18.7	USNO-B1
45.0	282.0349	-37.0363	R1=17.7, R2=18.3	USNO-B1
48.6	282.0476	-37.0139	B2=19.0, R2=18.8	USNO-B1
53.2	282.0318	-37.0370	B2=18.6, R1=18.2, R2=18.8	USNO-B1
53.5	282.0643	-37.0259	B2=18.1, I=17.1, R1=17.4, R2=17.8	USNO-B1
57.7	282.0558	-37.0134	B2=18.5, R2=18.0	USNO-B1

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

There are 231 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
10.9	282.0421	-37.0266	B2=18.5, R1=18.1, R2=18.6	USNO-B1
10.9	282.0433	-37.0251	h=16.1, j=16.6, k=15.7	2MASS
13.6	282.0489	-37.0245	B2=19.0, R1=17.3, R2=18.5	USNO-B1
14.7	282.0493	-37.0303	B2=18.6, R1=18.1, R2=19.4	USNO-B1
15.5	282.0424	-37.0240	B2=16.8, I=14.6, R1=15.2, R2=15.6	USNO-B1
15.6	282.0420	-37.0242	h=14.7, j=15.4, k=14.8	2MASS
17.7	282.0458	-37.0322	B2=17.6, I=16.6, R1=16.9, R2=17.7	USNO-B1
19.2	282.0524	-37.0264	h=15.2, j=15.6, k=15.0	2MASS
20.0	282.0525	-37.0288	B2=18.4, R1=17.8, R2=18.7	USNO-B1
21.1	282.0421	-37.0324	B2=18.9, R2=19.3	USNO-B1

Queried USNO-B1, SDSS, 2MASS.

There are 611 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.