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UVOT images|
SPER data|
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Swift Trigger: 1344131

Presumed name: GRB 250821A

Back to trigger list.

BAT 23h 53m 38.88s, -28° 37′ 04.8″
position:(358.412, -28.618 ± 180″)
XRT 23h 53m 45.71s, -28° 39′ 13.3″
position:(358.44046, -28.65369 ± 2.9″)
UVOT No position available.
Galactic NHI:1.57×1020 cm-2
Galactic E(B-V):0.017 mag
Best RA:23h 53m 45.71s= 358.44046 d
Best Dec:-28° 39′ 13.3″= -28.65369 d
Gal Lat:-77.17
Gal Long:22.76
Sun angle:149.13°, 10.1 hr West

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.

Image of the SPER data

There are 11 SPER messages, and 1 objects have been found

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 DecDate reportedSource MiscQuery

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 Query
70.9358.4512-28.63642dFGRS TGS275Z077B=18.325, R=17.577Query vizier around this object
87.3358.4162-28.6653LEDA 85880B=16Query vizier around this object
110.3358.4596-28.67932dFGRS TGS274Z001B=19.183, R=18.519Query vizier around this object
127.9358.4055-28.63582QZ J235337.2-283808G=20.233427Query vizier around this object
150.3358.4329-28.69492dFGRS TGS274Z002B=19.222, R=17.789Query vizier around this object
155.3358.3915-28.6575LEDA 739057B=18.321, G=20.394529, R=17.019Query vizier around this object
180.0358.4851-28.6226Gaia DR3 2327986318698720512G=19.332565Query vizier around this object
181.8358.4108-28.61042QZ J235338.5-283637Query vizier around this object

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 table2Observatory Query

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

1Energy band for count-rate is mission specific.

Galaxies

RA*Dec*Redshift CatalogueQuery
10.3358.4437-28.6531NEDQuery vizier around this object
10.5358.4437-28.6529B=21.2, R2=19.3SSSQuery vizier around this object
15.1358.4422-28.6498B1=20.7, B2=20.9, R2=20.0USNO-B1Query vizier around this object
19.9358.4350-28.6564NEDQuery vizier around this object
23.2358.4371-28.6481NEDQuery vizier around this object
25.2358.4467-28.6492NEDQuery vizier around this object
30.4358.4333-28.6478NEDQuery vizier around this object
32.5358.4433-28.6450NEDQuery vizier around this object
33.1358.4321-28.6594NEDQuery vizier around this object
35.3358.4467-28.6619NEDQuery vizier around this object

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

There are 212 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* CatalogueQuery
9.8358.4435-28.6531B1=20.9, B2=20.7, R2=18.9USNO-B1Query vizier around this object
32.6358.4474-28.6604I=18.1, R1=19.1USNO-B1Query vizier around this object
44.6358.4325-28.6435h=15.7, j=16.0, k=15.32MASSQuery vizier around this object
47.2358.4375-28.6665B2=20.8, I=18.4, R1=19.4, R2=19.1USNO-B1Query vizier around this object
52.3358.4523-28.6436B1=20.7, B2=20.7, R2=19.8USNO-B1Query vizier around this object
53.1358.4297-28.6423B1=20.7, B2=20.7, R2=19.6USNO-B1Query vizier around this object
60.7358.4215-28.6564B2=19.5, R1=18.6, R2=24.1USNO-B1Query vizier around this object
63.5358.4280-28.6675B2=21.2, R1=19.1, R2=19.4USNO-B1Query vizier around this object
65.2358.4508-28.6380B1=20.7, B2=20.1, R1=17.3, R2=19.9USNO-B1Query vizier around this object
67.8358.4476-28.6715B2=21.5, R2=23.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 113 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.