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Swift Trigger: 1222885

Presumed name: GRB 240418A

Back to trigger list.

BAT 15h 57m 17.28s, +23° 36′ 25.2″
position:(239.322, 23.607 ± 180″)
XRT 15h 57m 29.62s, +23° 35′ 45.9″
position:(239.37342, 23.59607 ± 1.9″)
UVOT No position available.
Galactic NHI:4.32×1020 cm-2
Galactic E(B-V):0.060 mag
Best RA:15h 57m 29.62s= 239.37342 d
Best Dec:+23° 35′ 45.9″= 23.59607 d
Gal Lat:48.05
Gal Long:38.83
Sun angle:133.00°, 9.8 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 5 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
154.1239.377723.5534SDSS J155730.65+233312.3G=17.163370, g=17.135, i=17.352, r=17.235, u=18.493, z=17.368Query 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
8.2239.372823.5983R=22.7, g=23.6, i=23.1, u=24.0, z=23.1SDSSQuery vizier around this object
14.7239.376723.5986NEDQuery vizier around this object
14.8239.374223.5919Mag=23.2NEDQuery vizier around this object
24.2239.366223.5947NEDQuery vizier around this object
27.2239.381023.5990B=21.6, R=18.9APM-NQuery vizier around this object
27.6239.375223.5886R=21.3, g=21.9, i=21.3, u=22.7, z=21.5SDSSQuery vizier around this object
27.6239.375123.5886R=21.4, g=22.0, i=21.4, u=23.0, z=21.7SDSSQuery vizier around this object
27.7239.375023.5886Mag=22.1NEDQuery vizier around this object
27.7239.367523.5906R1=18.7, R2=20.6USNO-B1Query vizier around this object
28.2239.381023.5996R=20.5, g=21.4, i=19.9, u=22.2, z=19.8SDSSQuery vizier around this object


There are 577 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
14.7239.374123.5920I=20.9, R=21.8, g=23.3, u=23.3, z=20.5SDSSQuery vizier around this object
14.8239.374023.5920I=21.0, R=21.7, g=23.2, u=23.5, z=20.4SDSSQuery vizier around this object
18.4239.375823.6007I=22.7, R=23.0, g=23.2, u=23.4, z=22.7SDSSQuery vizier around this object
24.8239.374323.5892B2=21.3, R1=20.1USNO-B1Query vizier around this object
28.4239.381123.5996B2=21.2, R1=20.1, R2=20.5USNO-B1Query vizier around this object
38.1239.376323.6063I=23.9, R=24.3, g=24.8, u=24.4, z=20.7SDSSQuery vizier around this object
40.6239.384623.5913R1=18.9, R2=18.6USNO-B1Query vizier around this object
42.4239.367723.5855I=20.1, R=21.7, g=23.2, u=24.8, z=19.1SDSSQuery vizier around this object
42.5239.367723.5855I=20.1, R=21.6, g=22.6, u=23.1, z=19.3SDSSQuery vizier around this object
42.9239.362023.5905h=13.1, j=13.5, k=13.12MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 302 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.