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Swift Trigger: 1104343

Presumed name: GRB 220427A

Back to trigger list.

BAT 18h 23m 28.56s, -56° 15′ 10.8″
position:(275.869, -56.253 ± 180″)
XRT 18h 23m 33.26s, -56° 15′ 18.3″
position:(275.88860, -56.25508 ± 3.5″)
UVOT 18h 23m 33.31s, -56° 15′ 18.0″
position:(275.8888, -56.2550 ± 0.6″)
Galactic NHI:7.39×1020 cm-2
Galactic E(B-V):0.106 mag
Best RA:18h 23m 33.31s= 275.8888 d
Best Dec:-56° 15′ 18.0″= -56.2550 d
Gal Lat:-18.61
Gal Long:338.51
Sun angle:not found

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 11 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
0.3′′275.88883-56.25508GCN #31960GRB 220427A: Swift detection of a burst with an optical counterpartVizier logo
2.0′′275.88813-56.25542GCN #31962GRB 220427A: Enhanced Swift-XRT positionVizier logo
66.0′′275.92167-56.25658GCN #31968GRB 220427A: Swift-BAT refined analysisVizier logo

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
41.8275.9092-56.2572UCAC4 169-194258B=14.587, G=13.5446, H=11.784, J=12.181, K=11.702, R=13.587, V=13.742, g=14.146, r=13.482Query vizier around this object
81.9275.9283-56.2496UCAC4 169-194271B=14.271, G=13.3267, H=11.800, J=12.144, K=11.732, R=13.394, V=13.482, g=13.841, i=12.977, r=13.245Query vizier around this object
92.6275.9000-56.2800XSS J18236-5616Query vizier around this object
100.5275.9219-56.2342UCAC4 169-194265B=14.516, G=13.3496, H=11.486, J=11.917, K=11.383, R=13.391, V=13.537, g=14.010, i=12.949, r=13.224Query vizier around this object
145.3275.8381-56.2261UCAC4 169-194223B=14.338, G=13.5440, H=12.149, J=12.428, K=12.101, R=13.602, V=13.677, g=13.991, i=13.306, r=13.503Query vizier around this object
155.6275.9655-56.2484UCAC4 169-194292B=14.242, G=13.3069, H=11.648, J=12.028, K=11.501, R=13.380, V=13.474, g=13.834, i=12.976, r=13.238Query vizier around this object
181.8275.9591-56.2232UCAC4 169-194286G=13.0791, H=10.718, J=11.346, K=10.629, R=13.168, V=13.401, g=14.014, i=12.560, r=12.986Query vizier around this object
195.3275.8876-56.2008UCAC4 169-194244B=14.199, G=13.6178, H=12.428, J=12.674, K=12.427, R=13.715, V=13.646, g=13.906, i=13.371, r=13.583Query vizier around this object

There are 8 SIMBAD objects within the position error. The full list is here.

* RA/Dec in equinox J2000

X-ray sources

RA*Dec* Source table2Observatory Query
75.5275.8894-56.27600.32 +/- 0.09RXTEQuery vizier around this object

Queried the X-ray MASTER catalogue.

* RA/Dec in equinox J2000

1Energy band for count-rate is mission specific.


RA*Dec*Redshift CatalogueQuery
15.7275.8808-56.2556NEDQuery vizier around this object
17.4275.8925-56.2506NEDQuery vizier around this object
18.6275.8925-56.2504B2=17.9, I=16.6, R1=16.7, R2=16.6USNO-B1Query vizier around this object
20.4275.8916-56.2497B=19.6, R2=18.6, i=18.3SSSQuery vizier around this object
20.4275.8916-56.2497B2=18.1, I=17.3, R1=17.5, R2=17.4USNO-B1Query vizier around this object
26.5275.8962-56.2611B2=19.3, I=18.2, R1=18.3, R2=19.2USNO-B1Query vizier around this object
27.9275.8776-56.2504B2=17.3, I=14.8, R1=15.3, R2=15.1USNO-B1Query vizier around this object
28.1275.8775-56.2503NEDQuery vizier around this object
29.2275.9026-56.2529B=21.5, R2=20.4SSSQuery vizier around this object
30.1275.8737-56.2560B2=19.8, R1=19.0USNO-B1Query vizier around this object


There are 475 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
3.4275.8869-56.2551B2=19.4, R1=19.1, R2=19.5USNO-B1Query vizier around this object
13.2275.8863-56.2585B2=19.1, I=18.2, R1=18.0, R2=18.7USNO-B1Query vizier around this object
15.0275.8812-56.2557B2=15.1, I=12.9, R1=13.8, R2=13.2USNO-B1Query vizier around this object
15.2275.8811-56.2557h=12.2, j=12.4, k=12.12MASSQuery vizier around this object
17.8275.8925-56.2506h=15.7, j=16.2, k=15.52MASSQuery vizier around this object
19.3275.8920-56.2500B2=18.1, R2=17.0USNO-B1Query vizier around this object
27.9275.8775-56.2503h=13.8, j=14.2, k=13.62MASSQuery vizier around this object
31.3275.8739-56.2522B2=18.7, I=17.5, R1=17.6, R2=17.7USNO-B1Query vizier around this object
33.7275.8788-56.2475B2=19.8, I=17.9, R1=18.4, R2=19.5USNO-B1Query vizier around this object
33.8275.8788-56.2474h=15.9, j=16.7, k=15.12MASSQuery vizier around this object

Queried USNO-B1, SDSS, 2MASS.

There are 428 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.