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Swift Trigger: 958733

Presumed name: GRB 200228B

Back to trigger list.

BAT 16h 48m 06.24s, +16° 57′ 36.0″
position:(252.026, +16.960 ± 180″)
XRT 16h 48m 11.35s, +16° 59′ 06.0″
position:(252.0473, +16.9850 ± 5.7″)
UVOT No position available.
Galactic NHI:5.00×100 cm-2
Galactic E(B-V):0.076 mag
Best RA:16h 48m 11.35s= 252.0473 d
Best Dec:+16° 59′ 06.0″= +16.9850 d
Gal Lat:34.69
Gal Long:35.48
Sun angle:91.07°, 5.9 hr West

1Onboard position

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 1 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′′252.0473016.98505GCN #27254GRB 200228B: Swift detection of a burstVizier logo
3.1′′252.0464216.98522GCN #27256GRB 200228B: Enhanced Swift-XRT positionVizier logo
6.9′′252.0453316.98458GCN #27276GRB 200228B: Mondy� TSHAO� AbAO and CrAO optical observations� afterglow candidateVizier logo
156.6′′252.0075016.96397GCN #27273GRB 200228B: Swift-BAT refined analysisVizier 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
189.2252.017917.0294TYC 1525-702-1B=12.48, G=11.6953, H=10.378, J=10.671, K=10.336, V=11.85Query 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
11.1252.050416.9856NEDQuery vizier around this object
11.7252.043816.9853NEDQuery vizier around this object
16.3252.050816.9822NEDQuery vizier around this object
19.0252.051816.9819R=23.1, g=24.3, i=22.0, u=25.1, z=20.9SDSSQuery vizier around this object
21.0252.041316.9859R=21.5, g=22.0, i=20.0, u=21.9, z=20.3SDSSQuery vizier around this object
21.5252.041216.9858NEDQuery vizier around this object
21.8252.045416.9908NEDQuery vizier around this object
22.2252.045616.9909R=20.3, g=20.9, i=20.0, u=21.8, z=20.0SDSSQuery vizier around this object
23.8252.040416.9847R=23.4, g=25.9, i=21.3, u=24.4, z=22.0SDSSQuery vizier around this object
24.2252.043616.9793B1=21.3, B2=21.2, R2=20.5USNO-B1Query vizier around this object


There are 476 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
10.6252.050316.9856I=17.7, R=18.2, g=19.3, u=21.8, z=17.5SDSSQuery vizier around this object
10.6252.050316.9857B1=19.7, B2=19.2, I=17.4, R1=18.3, R2=17.7USNO-B1Query vizier around this object
11.1252.050516.9855h=15.8, j=16.2, k=15.52MASSQuery vizier around this object
12.6252.043716.9855I=22.0, R=23.0, g=24.4, u=24.5, z=21.4SDSSQuery vizier around this object
12.7252.048416.9884I=20.0, R=20.5, g=21.7, u=24.7, z=19.6SDSSQuery vizier around this object
15.6252.051816.9849I=22.2, R=23.2, g=25.7, u=24.2, z=21.2SDSSQuery vizier around this object
20.2252.042016.9826I=20.6, R=20.6, g=20.9, u=21.9, z=20.6SDSSQuery vizier around this object
20.2252.042016.9826B1=21.1, B2=20.6USNO-B1Query vizier around this object
22.3252.045616.9910B1=21.3, B2=20.9, I=19.0, R1=20.1, R2=20.2USNO-B1Query vizier around this object
25.8252.039916.9861I=20.7, R=22.1, g=24.1, u=23.8, z=20.0SDSSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 407 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.