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Swift Trigger: 1072990

Presumed name: GRB 210912A

Back to trigger list.

BAT 08h 39m 04.56s, +79° 11′ 38.4″
position:(129.769, 79.194 ± 180″)
XRT 08h 39m 32.06s, +79° 13′ 22.5″
position:(129.88358, 79.22292 ± 7.5″)
UVOT No position available.
Galactic NHI:2.24×1020 cm-2
Galactic E(B-V):0.023 mag
Best RA:08h 39m 32.06s= 129.88358 d
Best Dec:+79° 13′ 22.5″= 79.22292 d
Gal Lat:31.57
Gal Long:134.21
Sun angle:77.74°, 2.7 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 3 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′′129.8835879.22292GCN #30820GRB 210912A: Swift detection of a burstVizier logo
6.7′′129.8899079.22148GCN #30830GRB 210912A: Enhanced Swift-XRT positionVizier logo
7.3′′129.8917279.22158GCN #30829GRB 210912A: Host-galaxy candidate in PanSTARRSVizier logo
8.0′′129.8929279.22153GCN #30844GRB 210912A: BOOTES-5/JGT optical afterglow candidate (Correction to GCNC 30823)Vizier logo
8.0′′129.8929279.22153GCN #30823GRB 210912A: BOOTES-5/JGT optical afterglow candidateVizier logo
8.2′′129.8927979.22142GCN #30832GRB 210912A: Swift/UVOT DetectionVizier logo
24.1′′129.8737579.21647GCN #30839GRB 210912A: Swift-BAT refined analysisVizier logo
71.7′′129.8010979.21031GCN #30825GRB 210912A: Mondy optical afterglow confirmationVizier logo

There are 14 matches in total. See the full table for details.

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

* 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
4.2129.878879.2222NEDQuery vizier around this object
9.7129.897279.2238B=21.6, R=20.0APM-NQuery vizier around this object
11.2129.890479.2200NEDQuery vizier around this object
20.0129.910079.2256NEDQuery vizier around this object
21.5129.912179.2203NEDQuery vizier around this object
22.0129.857179.2194NEDQuery vizier around this object
23.3129.862179.2281NEDQuery vizier around this object
24.5129.870079.2167NEDQuery vizier around this object
29.8129.844279.2267B1=21.1, I=18.1USNO-B1Query vizier around this object
35.2129.928679.2279B=21.6, R=19.6APM-NQuery vizier around this object


There are 280 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
49.0129.837579.2335B2=20.4, R1=19.8USNO-B1Query vizier around this object
49.6129.853379.2355h=15.1, j=15.6, k=15.02MASSQuery vizier around this object
50.0129.853179.2356B1=20.1, B2=20.4, I=17.2, R1=18.2, R2=17.9USNO-B1Query vizier around this object
50.7129.920879.2352B1=20.8, B2=21.0, R1=20.0, R2=19.4USNO-B1Query vizier around this object
68.3129.840179.2401I=18.0, R2=18.3USNO-B1Query vizier around this object
69.8129.933179.2400h=14.8, j=15.5, k=14.62MASSQuery vizier around this object
69.8129.932879.2400B1=19.5, B2=19.4, I=16.8, R1=16.9, R2=17.5USNO-B1Query vizier around this object
71.7129.801179.2103B1=16.4, B2=17.3, I=15.4, R1=15.9, R2=15.9USNO-B1Query vizier around this object
72.0129.811279.2082h=15.8, j=16.4, k=16.22MASSQuery vizier around this object
72.0129.811079.2082B1=17.9, B2=18.3, I=17.4, R1=17.2, R2=16.9USNO-B1Query vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 97 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.