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Swift Trigger: 512164

Presumed name: GRB 120121A

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BAT 16h 37m 20.64s, -23° 57′ 14.4″
position:(249.336, -23.954 ± 180″)
XRT 16h 37m 25.13s, -23° 57′ 42.5″
position:(249.3547, -23.9618 ± 3.2″)
UVOT No position available.
Galactic NHI:1.15×1021 cm-2
Galactic E(B-V):0.869 mag
Best RA:16h 37m 25.13s= 249.3547 d
Best Dec:-23° 57′ 42.5″= -23.9618 d
Gal Lat:15.29
Gal Long:355.11
Sun angle:49.43°, 3.6 hr West

1Sper #6 auto processing.

GCN Notices for this burst.

View this region in Aladin.

Observability of this burst for Swift.

Sun angle for this burst.

UVOT data

UVOT u image

u image

UVOT white image

white image

UVOT white image

white image

Blink images with DSS (link via GSFC)


SPER results page for this trigger.

Image of the SPER data

There are 8 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
0.0′′249.35470-23.96180GCN #12886GRB 120121A: Swift-XRT positionVizier logo
1.6′′249.35429-23.96156GCN #12888GRB 120121A: Enhanced Swift-XRT positionVizier logo
27.2′′249.36292-23.96275GCN #12889GRB 120121A: Swift-BAT refined analysisVizier logo
63.3′′249.33750-23.95389GCN #12885GRB 120121A: Swift detection of a burstVizier logo

Catalogue Searches. Searched 3.33′ 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

* 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
22.7249.3479-23.9627B=21.8SSSQuery vizier around this object
30.3249.3555-23.9534B=21.5SSSQuery vizier around this object
48.5249.3470-23.9503B=20.1, R2=18.9, i=18.4SSSQuery vizier around this object
51.5249.3398-23.9574B=21.6SSSQuery vizier around this object
53.6249.3692-23.9686B=20.6, R2=20.0SSSQuery vizier around this object
55.7249.3395-23.9551B=20.8, R2=20.2SSSQuery vizier around this object
56.5249.3401-23.9535B=19.9, R2=18.7, i=18.9SSSQuery vizier around this object
59.0249.3665-23.9742B=21.3SSSQuery vizier around this object
59.4249.3396-23.9708B=21.2, R2=20.4SSSQuery vizier around this object
61.1249.3621-23.9462B=21.6SSSQuery vizier around this object


There are 122 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

Queried USNO-B1, SDSS, 2MASS.

* 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.