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Swift Trigger: 1163401

Presumed name: GRB 230409B

Back to trigger list.

BAT 21h 58m 07.20s, +52° 51′ 14.4″
position:(329.530, +52.854 ± 180″)
XRT 21h 58m 03.59s, +52° 49′ 56.6″
position:(329.51496, 52.83238 ± 1.9″)
UVOT No position available.
Galactic NHI:6.12×1021 cm-2
Galactic E(B-V):1.202 mag
Best RA:21h 58m 03.59s= 329.51496 d
Best Dec:+52° 49′ 56.6″= 52.83238 d
Gal Lat:-1.59
Gal Long:98.42
Sun angle:59.71°, 3.2 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 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
0.4′′329.5148852.83228GCN #33592GRB 230409B: Swift detection of a burstVizier logo
1.1′′329.5147452.83212GCN #33594GRB 230409B: Enhanced Swift-XRT positionVizier logo
2.1′′329.5158052.83210GCN #33595GRB 230409B: Swift/UVOT DetectionVizier logo
2.4′′329.5158352.83197GCN #33598GRB 230409B: Swift-BAT refined analysisVizier logo
37.8′′329.5080052.82277GCN #33608GRB 230409B: Mondy optical upper limitVizier logo

There are 12 matches in total. See the full table for details.

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
97.7329.472052.8403TYC 3968-836-1B=12.56, G=12.253281, H=11.508, J=11.602, K=11.522, V=12.30Query vizier around this object
161.2329.482952.8727[ABC90] cyc 58G=14.507000, H=8.154, J=9.790, K=6.945, V=17Query vizier around this object
182.1329.434552.8465TYC 3968-161-1B=12.33, G=12.508884, H=11.508, J=11.582, K=11.419, V=12.67Query vizier around this object
185.0329.566652.8732TYC 3968-1442-1B=11.99, G=11.708140, H=10.353, J=10.641, K=10.304, V=11.73Query vizier around this object
189.5329.470552.8777Hetzler I 14B=12.84, G=8.661266, H=3.50, J=4.699, K=2.98, V=11.59Query vizier around this object

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 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
4.2329.514752.8335B1=19.6, B2=19.8, I=17.9, R1=17.9, R2=18.2USNO-B1Query vizier around this object
5.2329.512952.8317NEDQuery vizier around this object
9.4329.514252.8350NEDQuery vizier around this object
12.8329.515352.8288B1=19.3, B2=20.2, I=17.9, R1=18.4, R2=18.9USNO-B1Query vizier around this object
13.0329.517952.8356NEDQuery vizier around this object
13.4329.517852.8357B1=19.7, I=17.9, R1=18.6, R2=18.5USNO-B1Query vizier around this object
14.5329.521352.8333NEDQuery vizier around this object
19.9329.511252.8374B1=18.9, B2=19.0, I=17.3, R1=17.6, R2=17.6USNO-B1Query vizier around this object
20.3329.511252.8375NEDQuery vizier around this object
22.1329.525052.8314NEDQuery vizier around this object


There are 836 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
5.2329.512952.8316h=15.7, j=16.6, k=15.52MASSQuery vizier around this object
9.4329.514252.8350h=15.5, j=15.8, k=15.52MASSQuery vizier around this object
9.8329.514452.8351B1=18.0, B2=18.3, I=16.4, R1=16.9, R2=16.8USNO-B1Query vizier around this object
13.0329.517852.8356h=15.9, j=16.4, k=15.92MASSQuery vizier around this object
14.5329.521452.8335h=15.3, j=15.7, k=14.92MASSQuery vizier around this object
15.0329.521652.8336I=17.6, R1=19.0, R2=19.0USNO-B1Query vizier around this object
20.3329.511352.8376h=15.6, j=16.5, k=16.72MASSQuery vizier around this object
22.1329.525052.8315h=15.6, j=16.4, k=14.92MASSQuery vizier around this object
22.8329.525452.8316B1=18.5, B2=18.7, I=17.4, R1=17.6, R2=17.0USNO-B1Query vizier around this object
23.8329.515452.8390h=13.0, j=13.7, k=12.82MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 844 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.