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GRB 250402A: Swift observation summary

This is a confirmed GRB (GRB 250402A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019673 for updated analysis

.
Mission:SVOM/ECLAIRs
SVOM RA:213.355°
SVOM Dec:-5.937°
SVOM Err:4.1 arcmin
T0:2025-04-02 23:08:01 UT
Galactic:336.90° +51.44°
Galactic NH:2.52× 1020 cm-2
Sun distance:158.78°
Sun angle:10.58 [hr] (West of Sun)
Moon distance:135.77°
Visibility of this field.
First slew:2025-04-03 12:44:42 UT
First observation:2025-04-03 12:44:10 UT
First analysis:2025-04-03 15:31:46 UT
Data analysed so far:
  • ObsID: 00019673001 with 2.4 ks exposure.

About tiled field analysis.

So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.

Find an upper limit.

Sources found so far

So far 3 sources have been found in the XRT data. 1 sources match catalogued sources.

:

# RA (J2000) Dec (J2000) Err901 Detection
Flag2
Rank3 Dist from
SVOM/ECLAIRs pos
Exposure Notes Vizier
1
[details]
14h 13m 38.13s -05° 55′ 48.5″ 3.4′′ * Good 3 (U) 3.2′ 2.4 ks Vizier logo
2
[details]
14h 13m 29.27s -06° 04′ 12.9″ 4.4′′ * Good 3 (U) 8.1′ 2.4 ks Vizier logo
3
[details]
14h 13m 48.71s -06° 00′ 01.7″ 6.3′′ Good 3 (U) 7.0′ 2.4 ks Matches SIMBAD source: 4C -05.60, 3.4″ away. Vizier logo

1 Radius, 90% confidence.
2 Indicates how likely the source is to be real. See the LSXPS documentation.
3 T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
* The position was enhanced using astrometry derived from the Swift UVOT.
The position was astrometrically corrected using the XRT sources and the 2MASS catalogue.


Image

Select image style: Draggable PNG | JS9.

FITS image.

Image of all observations processed so far

Exposure map

FITS exposure map.

Exposure map of all observations processed so far