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Swift Trigger: 1185673

Presumed name: GRB 230816A

Back to trigger list.

BAT 21h 53m 30.00s, +37° 49′ 40.8″
position:(328.375, 37.828 ± 180″)
XRT 21h 53m 46.78s, +37° 51′ 17.9″
position:(328.44492, 37.85498 ± 1.9″)
UVOT No position available.
Galactic NHI:1.75×1021 cm-2
Galactic E(B-V):0.296 mag
Best RA:21h 53m 46.78s= 328.44492 d
Best Dec:+37° 51′ 17.9″= 37.85498 d
Gal Lat:-12.83
Gal Long:88.41
Sun angle:128.33°, 11.8 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 7 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).


RA*Dec*SIMBAD name Query
142.3328.449837.8157TYC 3185-1950-1B=12.59, G=11.915121, H=10.667, J=10.939, K=10.626, V=12.17Query vizier around this object
150.6328.492237.8361Gaia DR3 1950007378222743552G=20.681089Query vizier around this object

* 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
5.0328.444237.8564NEDQuery vizier around this object
10.6328.447537.8572NEDQuery vizier around this object
12.2328.441737.8528NEDQuery vizier around this object
18.9328.443637.8601B2=19.0, I=17.7, R1=18.4, R2=17.8USNO-B1Query vizier around this object
19.4328.451537.8564B1=20.1, B2=18.4, I=17.5USNO-B1Query vizier around this object
19.4328.451337.8569NEDQuery vizier around this object
19.7328.444637.8606NEDQuery vizier around this object
21.7328.450137.8594B2=21.8, R1=18.8USNO-B1Query vizier around this object
23.4328.442537.8489NEDQuery vizier around this object
28.5328.436937.8597B1=19.9, I=17.4USNO-B1Query vizier around this object


There are 327 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
5.0328.444437.8563B1=19.2, B2=19.5, I=16.3, R1=17.4, R2=17.5USNO-B1Query vizier around this object
5.0328.444337.8563h=14.5, j=15.1, k=14.22MASSQuery vizier around this object
10.5328.447437.8572h=13.4, j=13.7, k=13.22MASSQuery vizier around this object
10.7328.447537.8572B1=15.9, B2=16.1, I=14.4, R1=14.6, R2=15.3USNO-B1Query vizier around this object
11.7328.441837.8528B1=19.8, B2=19.7, I=16.8, R1=17.5, R2=18.0USNO-B1Query vizier around this object
12.0328.441137.8535I=18.5, R1=19.0, R2=19.7USNO-B1Query vizier around this object
12.2328.441837.8527h=15.0, j=15.8, k=14.92MASSQuery vizier around this object
19.4328.444137.8603B2=19.3, I=17.6, R1=18.5, R2=18.1USNO-B1Query vizier around this object
19.4328.451237.8570h=15.7, j=16.2, k=15.22MASSQuery vizier around this object
19.7328.444737.8605h=16.3, j=16.5, k=15.52MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 354 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.