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SVOM_FIELD00005
SVOM
5
/SVOM
sb25032706: Swift observation summary
This is a confirmed GRB (GRB 250327B), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019652 for updated analysis
.| Mission: | SVOM/ECLAIRs |
|---|---|
| SVOM RA: | 176.771° |
| SVOM Dec: | +29.882° |
| SVOM Err: | 8.9 arcmin |
| T0: | 2025-03-27 21:11:43 UT |
| Galactic: | 198.12° +75.61° |
| Galactic NH: | 1.64× 1020 cm-2 |
| Sun distance: | 146.00° |
|---|---|
| Sun angle: | 11.35 [hr] (East of Sun) |
| Moon distance: | 155.12° |
| Visibility of this field. | |
| First slew: | 2025-03-27 21:35:46 UT |
| First observation: | 2025-03-27 21:35:17 UT |
| First analysis: | 2025-03-28 00:06:16 UT |
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] |
11h 47m 06.94s | +29° 50′ 22.3″ | 3.5′′ | Good | 2 (O) | 2.6′ | 734 s | The source is 4.4-σ above the LSPXS 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 4 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] |
11h 47m 06.94s | +29° 50′ 22.3″ | 3.5′′ | Good | 2 (O) | 2.6′ | 734 s | The source is 4.4-σ above the LSPXS limit. | |
| 2 [details] |
11h 46m 39.97s | +29° 54′ 00.5″ | 7.2′′ | Reasonable | 4 (K) | 5.5′ | 734 s | Matches SIMBAD source: US 2934, 7.7″ away. Matches known X-ray source: LSXPS J114639.7+295404 (from LSXPS), 4.9″ away. |
|
| 3 [details] |
11h 46m 55.16s | +29° 49′ 57.2″ | 7.2′′ | Poor | 3 (U) | 3.7′ | 734 s | |
|
| 4 [details] |
11h 47m 11.99s | +29° 52′ 08.8″ | 8.2′′ | Poor | 3 (U) | 1.7′ | 734 s | |
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.
