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Swift Trigger: 539358

Presumed name: GRB 121123A

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BAT 20h 29m 26.88s, -11° 51′ 34.6″
position:(307.362, -11.8596 ± 180″)
XRT 20h 29m 16.20s, -11° 51′ 31.5″
position:(307.31750, -11.85874 ± 3.6″)
UVOT 20h 29m 16.30s, -11° 51′ 35.3″
position:(307.3179, -11.8598 ± 0.7″)
Galactic NHI:4.01×1020 cm-2
Galactic E(B-V):NED unavailable
Best RA:20h 29m 16.30s= 307.3179 d
Best Dec:-11° 51′ 35.3″= -11.8598 d
Gal Lat:-27.02
Gal Long:33.05
Sun angle:65.42°, -4.53 hr East of Sun

1Sper #4 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 white image

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UVOT white image

white image

UVOT white image

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Blink images with DSS (link via GSFC)


SPER results page for this trigger.

Image of the SPER data

There are 4 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
0.2′′307.31796-11.85983GCN #13982GRB 121123A: Swift detection of a burst with optical counterpartVizier logo
0.3′′307.31792-11.85989GCN #14003GRB 121123A: Swift/UVOT ObservationsVizier logo
0.6′′307.31787-11.85996GCN #13986GRB 121123A: NOT optical observationsVizier logo
1.7′′307.31813-11.86022GCN #13991GRB 121123A: Enhanced Swift-XRT positionVizier logo
3.3′′307.31830-11.85898GCN #13989GRB 121123A: Swift-XRT refined AnalysisVizier logo
74.0′′307.33400-11.87300GCN #13990GRB 121123A: Swift-BAT refined analysisVizier logo

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

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
11.6307.3213-11.8592NEDQuery vizier around this object
12.5307.3210-11.8591h=0.0, j=15.3, k=14.12MASSQuery vizier around this object
19.0307.3132-11.8555B=21.9SSSQuery vizier around this object
21.3307.3204-11.8536B2=21.4, R2=20.8USNO-B1Query vizier around this object
23.6307.3108-11.8593B=19.6, R2=18.3, i=17.9SSSQuery vizier around this object
25.1307.3214-11.8646B2=20.9, I=18.7, R2=19.8USNO-B1Query vizier around this object
30.5307.3260-11.8573B=19.9, R2=18.8, i=18.0SSSQuery vizier around this object
31.5307.3264-11.8576I=18.4, R1=19.2, R2=20.6USNO-B1Query vizier around this object
37.0307.3181-11.8690B1=19.9, B2=19.5, I=18.8, R2=18.8USNO-B1Query vizier around this object
37.4307.3259-11.8650B1=18.2, B2=17.9, I=17.3, R1=17.5, R2=17.3USNO-B1Query vizier around this object


There are 86 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
13.1307.3212-11.8591h=14.7, j=15.4, k=14.62MASSQuery vizier around this object
13.2307.3212-11.8590B2=21.2, I=17.1, R2=19.3USNO-B1Query vizier around this object
15.7307.3186-11.8630h=15.5, j=16.4, k=15.92MASSQuery vizier around this object
15.8307.3185-11.8630B1=19.0, B2=18.3, I=17.4, R1=17.9, R2=17.3USNO-B1Query vizier around this object
18.7307.3177-11.8536h=9.6, j=10.4, k=9.52MASSQuery vizier around this object
18.9307.3177-11.8535B1=14.6, B2=14.0, I=11.2, R1=12.5, R2=12.2USNO-B1Query vizier around this object
22.5307.3143-11.8534I=18.2, R2=19.9USNO-B1Query vizier around this object
23.5307.3109-11.8593h=15.9, j=17.2, k=15.52MASSQuery vizier around this object
24.9307.3105-11.8593B1=19.8, B2=18.8, I=16.6, R1=18.4, R2=17.6USNO-B1Query vizier around this object
28.5307.3178-11.8508B2=20.5, R2=19.3USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 275 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.