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SVOM_FIELD00017
SVOM
17
/SVOM
GRB 250530A: Swift observation summary
This is a confirmed GRB (GRB 250530A), the afterglow is source 1 -- please see the GRB results at https://www.swift.ac.uk/xrt_products/00019839 for updated analysis
.| Mission: | SVOM/ECLAIRs |
|---|---|
| SVOM RA: | 186.643° |
| SVOM Dec: | -2.574° |
| SVOM Err: | 8.8 arcmin |
| T0: | 2025-05-30 06:31:54 UT |
| Galactic: | 290.55° +59.70° |
| Galactic NH: | 2.51× 1020 cm-2 |
| Sun distance: | 118.36° |
|---|---|
| Sun angle: | 7.97 [hr] (East of Sun) |
| Moon distance: | 75.42° |
| Visibility of this field. | |
| First slew: | 2025-05-30 06:48:30 UT |
| First observation: | 2025-05-30 06:47:59 UT |
| First analysis: | 2025-05-30 08:41:29 UT |
- Data analysed so far:
- ObsID: 00019839001 with 2.0 ks exposure.
- ObsID: 00019839002 with 3.8 ks exposure.
So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.
- 19839 — 5.8 ks of cleaned data taken between 2025-05-30 06:48:28 and 2025-05-30 18:15:53
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] |
12h 26m 50.53s | -02° 34′ 33.4″ | 2.4′′ * | Good | 2 (O) | 4.1′ | 9.8 ks | The source is fading with 4.6-σ significance. The source is 4.5-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 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] |
12h 26m 50.53s | -02° 34′ 33.4″ | 2.4′′ * | Good | 2 (O) | 4.1′ | 9.8 ks | The source is fading with 4.6-σ significance. The source is 4.5-σ above the RASS limit. |
|
| 2 [details] |
12h 26m 02.13s | -02° 33′ 44.5″ | 4.0′′ * | Good | 3 (U) | 8.1′ | 9.8 ks | |
|
| 3 [details] |
12h 27m 12.30s | -02° 38′ 02.0″ | 6.7′′ | Poor | 3 (U) | 10.1′ | 9.8 ks | Matches SIMBAD source: [VV2006] J122712.4-023803, 2.5″ away. | |
| 4 [details] |
12h 26m 26.15s | -02° 23′ 23.2″ | 7.5′′ | Good | 3 (U) | 11.2′ | 9.8 ks | |
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.
