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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 |
- Data analysed so far:
- ObsID: 00019652001 with 0.7 ks exposure.
So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.
- 19652 — 734 s of cleaned data taken between 2025-03-27 21:35:46 and 2025-03-27 21:52:27
Details of afterglow candidates
1 sources were found which matches the afterglow criteria.
| # | 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. |  |
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.
