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Swift Trigger: 1191188

Presumed name: GRB 230911C

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BAT 15h 07m 07.68s, -41° 20′ 02.4″
position:(226.782, -41.334 ± 180″)
XRT 15h 07m 11.53s, -41° 19′ 47.0″
position:(226.79804, -41.32973 ± 4.2″)
UVOT No position available.
Galactic NHI:6.92×1020 cm-2
Galactic E(B-V):0.096 mag
Best RA:15h 07m 11.53s= 226.79804 d
Best Dec:-41° 19′ 47.0″= -41.32973 d
Gal Lat:14.67
Gal Long:328.61
Sun angle:69.84°, -3.9 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.


SPER results page for this trigger.

Image of the SPER data

There are 2 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
62.3226.7845-41.31572MFGC 12243H=14.385, J=15.200, K=13.903Query vizier around this object
93.3226.7992-41.3038Gaia DR3 6004882566405687680G=15.449829Query vizier around this object
118.7226.8418-41.3270TYC 7829-2776-1B=12.65, G=11.437800, H=9.912, J=10.272, K=9.873, V=12.03Query vizier around this object
178.0226.7961-41.2803TYC 7829-2448-1B=11.27, G=10.672974, H=9.505, J=9.765, K=9.465, V=10.55Query vizier around this object
198.8226.8300-41.2800HD 133718B=11.5, V=10.1Query 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
8.0226.7988-41.3275NEDQuery vizier around this object
21.1226.7904-41.3289NEDQuery vizier around this object
21.2226.7902-41.3290B2=21.0, I=17.6, R1=18.6, R2=18.6USNO-B1Query vizier around this object
22.2226.8062-41.3291B=19.6, R2=17.9, i=17.5SSSQuery vizier around this object
22.3226.8063-41.3292NEDQuery vizier around this object
28.1226.7979-41.3219NEDQuery vizier around this object
30.9226.8092-41.3314NEDQuery vizier around this object
35.1226.7903-41.3375B=20.8, R2=18.7, i=18.3SSSQuery vizier around this object
35.8226.7904-41.3378NEDQuery vizier around this object
38.8226.7921-41.3200NEDQuery vizier around this object


There are 547 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
7.9226.7970-41.3277B2=18.9, I=17.8, R1=18.0, R2=18.1USNO-B1Query vizier around this object
8.1226.7990-41.3276h=15.6, j=16.7, k=14.72MASSQuery vizier around this object
21.1226.7903-41.3290h=15.4, j=16.2, k=15.22MASSQuery vizier around this object
21.6226.8059-41.3286B2=20.0, R1=18.6USNO-B1Query vizier around this object
22.3226.8063-41.3292h=15.9, j=16.7, k=15.52MASSQuery vizier around this object
22.4226.8063-41.3291B2=19.5, I=17.6, R1=17.8, R2=17.7USNO-B1Query vizier around this object
28.3226.7981-41.3219B2=20.4, I=18.5, R1=18.7, R2=18.8USNO-B1Query vizier around this object
29.4226.8086-41.3315B2=19.2, I=18.1, R1=18.3, R2=18.5USNO-B1Query vizier around this object
29.5226.8068-41.3346B2=21.3, R1=19.7, R2=19.2USNO-B1Query vizier around this object
34.4226.7906-41.3375B2=20.9, R1=18.4, R2=18.5USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 485 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.