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Swift Trigger: 1165948

Presumed name: GRB 230427A

Back to trigger list.

BAT 10h 13m 17.76s, +48° 10′ 48.0″
position:(153.324, 48.180 ± 180″)
XRT 10h 13m 14.88s, +48° 12′ 14.5″
position:(153.31199, 48.20404 ± 1.9″)
UVOT 10h 13m 15.05s, +48° 12′ 14.4″
position:(153.3127, +48.2040 ± 0.7″)
Galactic NHI:8.18×1019 cm-2
Galactic E(B-V):0.008 mag
Best RA:10h 13m 15.05s= 153.3127 d
Best Dec:+48° 12′ 14.4″= +48.2040 d
Gal Lat:52.88
Gal Long:167.61
Sun angle:97.93°, -7.9 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 6 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
127.5153.260548.1952SDSS J101302.52+481142.7B=19.3, G=20.506514, R=19.1, g=20.3134, i=20.2741, r=20.1937, u=20.6716, z=19.7774Query vizier around this object
131.9153.364548.1931SDSS J101327.47+481135.3G=20.571600, g=20.6499, i=20.4919, r=20.5794, u=21.1553, z=20.1605Query vizier around this object
136.2153.337548.23782MASS J10132098+4814160G=17.783718, H=14.589, J=15.192, K=14.375, g=19.588, i=17.124, r=18.187, u=21.896, z=16.529Query vizier around this object
166.6153.245448.1910SDSS J101258.88+481127.5G=21.550545, g=19.580, i=17.180, r=17.809, u=21.973, z=16.815Query 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
12.8153.313848.2075Mag=23.7NEDQuery vizier around this object
15.6153.316048.2006B1=20.2, B2=20.5USNO-B1Query vizier around this object
18.5153.316748.1994Mag=19.0NEDQuery vizier around this object
19.5153.316648.1996R=18.3, g=19.1, i=17.8, u=20.4, z=17.5SDSSQuery vizier around this object
20.0153.316748.1995B=19.9, R=18.2APM-NQuery vizier around this object
28.3153.323848.2041R=23.1, g=24.4, i=21.6, u=24.2, z=21.3SDSSQuery vizier around this object
29.8153.314248.1958NEDQuery vizier around this object
32.1153.305148.1964R=21.4, g=22.5, i=20.6, u=23.2, z=20.0SDSSQuery vizier around this object
32.3153.318348.2122Mag=23.3NEDQuery vizier around this object
32.9153.305048.1964Mag=22.3NEDQuery vizier around this object


There are 459 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
13.1153.313748.2075I=22.4, R=22.5, g=23.6, u=24.9, z=23.4SDSSQuery vizier around this object
18.8153.316648.1998B1=19.3, B2=18.9, R1=18.0USNO-B1Query vizier around this object
19.7153.316748.1996B1=18.8, B2=19.1, I=17.5, R1=19.4, R2=18.0USNO-B1Query vizier around this object
25.5153.321548.2072I=25.2, R=25.1, g=23.2, u=25.8, z=22.4SDSSQuery vizier around this object
40.4153.309048.1930I=19.5, R=20.8, g=22.3, u=23.7, z=18.9SDSSQuery vizier around this object
40.5153.308948.1930I=19.5, R=20.8, g=22.3, u=24.0, z=18.8SDSSQuery vizier around this object
42.2153.316848.1928I=21.7, R=22.4, g=23.2, u=24.5, z=21.2SDSSQuery vizier around this object
43.5153.308248.1922B1=21.1, I=19.1USNO-B1Query vizier around this object
49.9153.331948.2001I=15.5, R=15.7, g=16.1, u=17.3, z=15.4SDSSQuery vizier around this object
49.9153.332048.2002B1=16.0, B2=16.2, I=15.5, R1=15.4, R2=15.6USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 181 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.