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EP_FIELD00015
EP
15
/EP
GRB 250205A: Swift observation summary
This is a confirmed GRB (GRB 250205A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019520 for updated analysis
.| Mission: | Einstein Probe/WXT |
|---|---|
| Einstein Probe RA: | 113.523° |
| Einstein Probe Dec: | +32.357° |
| Einstein Probe Err: | 3.1 arcmin |
| T0: | 2025-02-05 21:32:08 UT |
| Galactic: | 186.92° +22.53° |
| Galactic NH: | 4.39× 1020 cm-2 |
| Sun distance: | 151.23° |
|---|---|
| Sun angle: | 10.28 [hr](East of Sun) |
| Moon distance: | 55.57° |
| Visibility of this field. | |
| First slew: | 2025-02-05 22:42:33 UT |
| First observation: | 2025-02-05 22:37:18 UT |
| First analysis: | 2025-02-06 00:36:39 UT |
- Data analysed so far:
- ObsID: 00019520001 with 1.7 ks exposure.
- ObsID: 00019520002 with 2.5 ks exposure.
So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.
1 fields were processed but not included in the analysis. This is because, after standard processing and the removal of times contaminated by light reflected off the bright Earth, there was too little data (<100 s) for source detection to be performed.
Details of afterglow candidates
1 sources were found which matches the afterglow criteria.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Rank3 | Exposure | Notes | Vizier | |
|---|---|---|---|---|---|---|---|---|---|
| 1 [details] |
07h 34m 02.59s | +32° 22′ 18.4″ | 2.7′′ * | Good | 2 (O) | 1.1′ | 4.2 ks | The source is fading with 4.2-σ significance. The source is 3.9-σ above the RASS limit. |
 |
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.
Sources found so far
So far 5 sources have been found in the XRT data. 3 sources match catalogued sources.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Rank3 | Dist from Einstein Probe/WXT pos |
Exposure | Notes | Vizier |
|---|---|---|---|---|---|---|---|---|---|
| 1 [details] |
07h 34m 02.59s | +32° 22′ 18.4″ | 2.7′′ * | Good | 2 (O) | 1.1′ | 4.2 ks | The source is fading with 4.2-σ significance. The source is 3.9-σ above the RASS limit. |
|
| 2 [details] |
07h 34m 14.13s | +32° 17′ 22.5″ | 5.3′′ * | Good | 4 (K) | 4.4′ | 4.2 ks | Matches SIMBAD source: 2MASS J07341390+3217229, 4″ away. Matches known X-ray source: 2RXP J073414.1+321732 (from ROSAT/ROSPSPC), 8.0529572676549″ away. |
|
| 3 [details] |
07h 34m 53.84s | +32° 26′ 24.6″ | 5.7′′ | Good | 3 (U) | 11.4′ | 4.2 ks | Matches SIMBAD source: [VV2006] J073453.8+322623, 0.9″ away. | |
| 4 [details] |
07h 34m 10.56s | +32° 22′ 03.7″ | 5.2′′ | Good | 3 (U) | 1.2′ | 4.2 ks | |
|
| 5 [details] |
07h 34m 29.51s | +32° 26′ 11.7″ | 5.7′′ | Good | 3 (U) | 7.0′ | 4.2 ks | Matches SIMBAD source: SDSS J073429.54+322611.5, 0.5″ away. | |
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.
