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Swift Trigger: 1152509

Presumed name: GRB 230204A

Back to trigger list.

BAT 15h 52m 39.36s, -50° 51′ 28.8″
position:(238.164, -50.858 ± 180″)
XRT 15h 52m 46.80s, -50° 55′ 00.1″
position:(238.1950, -50.9167 ± 5.0″)
UVOT No position available.
Galactic NHI:8.77×1021 cm-2
Galactic E(B-V):3.318 mag
Best RA:15h 52m 46.80s= 238.1950 d
Best Dec:-50° 55′ 00.1″= -50.9167 d
Gal Lat:2.32
Gal Long:329.6
Sun angle:70.44°, 5.3 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.


SPER results page for this trigger.

Image of the SPER data

There are 2 SPER messges, but no object has been found.

See the SPER page for details of how the SPER image is searched for objects.

Known transients within 5′ of the GRB

Click on the offset to view the transient announcement.

Offset (′′)RA DecDate reportedSource MiscQuery
0.0′′238.19500-50.91670GCN #33260GRB 230204A: Swift detection of a possible burst (or possible transient Swift J1552.8-5055)Vizier logo
10.3′′238.19929-50.91576GCN #33266GRB 230204A: Swift/UVOT Upper LimitsVizier logo
10.5′′238.19962-50.91653GCN #33261GRB 230204A: Enhanced Swift-XRT positionVizier logo
255.9′′238.16600-50.84800GCN #33279GRB 230204A: Swift-BAT refined analysisVizier logo

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).


RA*Dec*SIMBAD name Query
78.5238.1662-50.9288Gaia DR3 5982163769971340288G=16.254929Query vizier around this object
88.2238.1668-50.9336Gaia DR3 5982163769970958208G=16.168816Query vizier around this object
127.4238.1400-50.9237IRAS 15488-5046G=11.065376, H=3.876, J=5.258, K=3.345Query vizier around this object
166.3238.2120-50.8718HD 141725B=9.45, G=9.365026, H=9.105, J=9.104, K=9.082, V=9.41Query vizier around this object

There are 4 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.


RA*Dec*Redshift CatalogueQuery
6.5238.1946-50.9150NEDQuery vizier around this object
6.7238.1947-50.9149B2=19.1, I=16.4, R1=16.6, R2=16.8USNO-B1Query vizier around this object
7.7238.1954-50.9189NEDQuery vizier around this object
10.3238.1992-50.9158NEDQuery vizier around this object
10.3238.1906-50.9160I=18.2, R1=18.4, R2=19.3USNO-B1Query vizier around this object
10.4238.1904-50.9161NEDQuery vizier around this object
10.4238.1979-50.9144NEDQuery vizier around this object
13.3238.1929-50.9203NEDQuery vizier around this object
15.7238.1903-50.9135R1=18.2, R2=17.7USNO-B1Query vizier around this object
16.0238.1900-50.9136NEDQuery vizier around this object


There are 1212 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


RA*Dec* CatalogueQuery
6.5238.1946-50.9149h=14.0, j=14.6, k=13.62MASSQuery vizier around this object
7.8238.1955-50.9188h=15.4, j=16.1, k=14.82MASSQuery vizier around this object
10.3238.1994-50.9159h=10.6, j=11.5, k=10.32MASSQuery vizier around this object
10.4238.1978-50.9144h=14.2, j=15.1, k=13.62MASSQuery vizier around this object
10.5238.1905-50.9161h=15.1, j=15.8, k=15.02MASSQuery vizier around this object
12.7238.2001-50.9153B2=15.4, I=11.4, R1=12.8, R2=13.1USNO-B1Query vizier around this object
13.3238.1929-50.9201h=14.8, j=16.1, k=14.92MASSQuery vizier around this object
16.0238.1899-50.9136h=13.2, j=14.2, k=12.82MASSQuery vizier around this object
16.9238.2017-50.9147h=11.5, j=12.4, k=11.32MASSQuery vizier around this object
17.4238.2012-50.9195h=15.1, j=16.2, k=14.92MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 1122 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.