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GRB 240828A: Swift observation summary
| Mission: | Fermi/LAT |
|---|---|
| GRB RA: | 225.492° |
| GRB Dec: | +36.641° |
| GRB Err: | 18.1 arcmin |
| T0: | 2024-08-28 14:55:06 UT |
| Galactic: | 60.20° +60.87° |
| Galactic NH: | 1.22× 1020 cm-2 |
| Galactic E(B-V): | 0.01689742 |
| Sun distance: | 66.91° |
|---|---|
| Sun angle: | 4.54 [hr] (East of Sun) |
| Moon distance: | 100.75° |
| Visibility of this field. | |
| First slew: | 2024-08-29 00:54:29 UT |
| First observation: | 2024-08-29 00:53:55 UT |
| First analysis: | UT |
Source 3 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.
So far 3 fields have been scheduled for observations. Data are available and processed for 3 of these. The list gives the exposure time used in source detection. If any individual sources were selected for follow-up observations, the source detection is not repeated for the follow up observations and the table below is not updated.
- 21707 — 1.1 ks of cleaned data taken between 2024-08-29 00:54:26 and 2024-08-29 02:35:50
- 21708 — 1.0 ks of cleaned data taken between 2024-08-29 02:35:55 and 2024-08-29 06:14:26
- 21710 — 1.2 ks of cleaned data taken between 2024-08-29 07:14:49 and 2024-08-29 07:37:37
Probable afterglow details
A source was found which matches the afterglow criteria.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Dist from LAT pos |
Exposure | Notes | Vizier |
|---|---|---|---|---|---|---|---|---|
| 3 [details] |
15h 02m 03.12s | +36° 31′ 42.5″ | 3.9′′ | Good | 6.8′ | 2.3 ks | The source is 5.4-σ above the RASS limit. This source may be affected by optical loading |
 |
1 Radius, 90% confidence.
2 Indicates how likely the source is to be real. See the 1SXPS documentation.
* 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 6 sources have been found in the XRT data. 3 sources match catalogued sources.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Dist from LAT pos |
Exposure | Notes | Vizier |
|---|---|---|---|---|---|---|---|---|
| 1 [details] |
15h 01m 27.99s | +36° 16′ 54.4″ | 4.4′′ | Good | 22.4′ | 1.2 ks | Matches SIMBAD source: TYC 2568-73-1, 5″ away. | |
| 2 [details] |
15h 00m 45.24s | +36° 30′ 17.8″ | 7.1′′ | Poor | 16.7′ | 1.1 ks | Matches SIMBAD source: SDSS J150044.80+363018.7, 5.3″ away. | |
| 3 [details] |
15h 02m 03.12s | +36° 31′ 42.5″ | 3.9′′ | Good | 6.8′ | 2.3 ks | The source is 5.4-σ above the RASS limit. This source may be affected by optical loading |
|
| 4 [details] |
15h 00m 48.31s | +36° 45′ 11.9″ | 8.0′′ | Poor | 15.5′ | 1.1 ks | |
|
| 5 [details] |
15h 02m 02.02s | +36° 31′ 15.2″ | 6.3′′ | Poor | 7.2′ | 2.3 ks | This source may be affected by optical loading | |
| 6 [details] |
15h 02m 03.61s | +36° 38′ 14.4″ | 5.8′′ | Good | 1.1′ | 1.0 ks | Matches SIMBAD source: SDSS J150203.33+363815.9, 3.7″ away. | |
1 Radius, 90% confidence.
2 Indicates how likely the source is to be real. See the 1SXPS documentation.
* 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.
