Swift Trigger: 1248132

Presumed name: GRB 240811A

BAT	15^h 05^m 29.52^s, +28° 51′ 14.4″
position:	(226.373, +28.854 ± 180″)
XRT	15^h 05^m 26.92^s, +28° 53′ 44.6″
position:	(226.36218, 28.89573 ± 1.9″)
UVOT	No position available.
Galactic N_HI:	1.84×10²⁰ cm^-2
Galactic E(B-V):	0.024 mag

Best RA:	15^h 05^m 26.92^s	= 226.36218 d
Best Dec:	+28° 53′ 44.6″	= 28.89573 d

Gal Lat:	60.47
Gal Long:	44.3

Sun angle:	78.41°, -5.7 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 8 SPER messages, and 1 objects have been found

- Object 1 - enhanced position.
- RA (J2000) : 15 05 26.90 (28.89573)
- Dec (J2000): +28 53 44.6 ( 28.89623)
- Error (90%): 1.9
- Counts in Source: 82

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
140.4	226.3462	28.9321	SDSS J150523.09+285555.7	g=20.93, i=19.20, r=19.85, u=21.4, z=18.9
164.7	226.3523	28.9406	SDSS J150524.55+285626.3	g=21.9, i=19.73, r=20.54, u=23.1, z=19.3
177.7	226.3288	28.8560	SDSS J150518.89+285121.5	G=15.273481, g=15.593, i=15.150, r=15.283, u=16.570, z=15.140
180.1	226.4193	28.8969	Gaia DR3 1275652119235433728	G=19.326981
194.3	226.3360	28.9446	[SPD2011] 67427
194.8	226.3514	28.8425	Gaia DR3 1275650817867201024	G=20.817266
195.6	226.4014	28.9378	SDSSCGB 12557.3	G=22.107107, g=19.857, i=18.716, r=19.117, u=20.827, z=18.536
195.8	226.3353	28.9448	SDSS J150520.48+285641.2	g=22.3, i=19.50, r=20.44, u=25.0, z=19.12

There are 8 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
0.2	226.3621	28.8957	R=22.5, g=25.2, i=22.6, u=24.9, z=22.5	SDSS
1.8	226.3625	28.8958		NED
8.3	226.3608	28.8978	Mag=23.1	NED
8.3	226.3611	28.8978	R=22.5, g=22.9, i=21.8, u=23.8, z=22.7	SDSS
8.7	226.3594	28.8957	R=22.7, g=25.4, i=21.2, u=24.2, z=20.0	SDSS
11.4	226.3650	28.8977	R=22.2, g=23.1, i=21.7, u=23.7, z=22.0	SDSS
11.4	226.3650	28.8978	Mag=22.9	NED
11.4	226.3650	28.8977	R=22.1, g=22.6, i=21.7, u=25.7, z=21.0	SDSS
11.5	226.3583	28.8956		NED
15.2	226.3637	28.8997	B1=20.1, B2=21.2	USNO-B1

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

There are 849 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
8.5	226.3611	28.8979	I=22.8, R=22.4, g=22.9, u=23.7, z=22.1	SDSS
8.7	226.3594	28.8957	I=22.1, R=23.9, g=25.1, u=24.3, z=21.4	SDSS
13.4	226.3579	28.8955	I=22.7, R=22.9, g=23.8, u=25.2, z=21.6	SDSS
13.7	226.3579	28.8955	I=22.4, R=22.2, g=24.0, u=24.6, z=22.0	SDSS
15.2	226.3637	28.8997	I=20.7, R=20.8, g=21.0, u=21.8, z=20.5	SDSS
15.3	226.3637	28.8997	I=20.7, R=20.8, g=21.1, u=22.5, z=20.9	SDSS
23.9	226.3694	28.8977	I=22.0, R=22.6, g=23.1, u=22.4, z=22.5	SDSS
29.6	226.3569	28.8889	I=21.9, R=22.4, g=24.7, u=25.2, z=21.2	SDSS
38.7	226.3638	28.9064	I=17.4, R=17.6, g=18.3, u=20.1, z=17.3	SDSS
38.7	226.3638	28.9064	h=16.2, j=16.3, k=15.5	2MASS

Queried USNO-B1, SDSS, 2MASS.

There are 352 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.