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GRB 230307A: Swift observation summary
| Mission: | Fermi/GBM |
|---|---|
| GRB RA: | 59.233° |
| GRB Dec: | -75.226° |
| GRB Err: | 5.8 deg |
| T0: | 2023-03-07 15:44:06 UT |
| Galactic: | 289.62° -36.69° |
| Galactic NH: | 1.03× 1021 cm-2 |
| Galactic E(B-V): | 0.1205059 |
| Sun distance: | 80.23° |
|---|---|
| Sun angle: | 4.75 [hr](East of Sun) |
| Moon distance: | 103.23° |
| Visibility of this field. | |
Source 2 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 1 fields have been scheduled for observations. Data are available and processed for 32 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.
- 21537 — 248 s of cleaned data taken between 2023-03-08 12:56:42 and 2023-03-08 13:02:53
- 21538 — 240 s of cleaned data taken between 2023-03-08 13:02:55 and 2023-03-08 13:07:17
- 21539 — 240 s of cleaned data taken between 2023-03-08 13:07:21 and 2023-03-08 13:11:43
- 21540 — 218 s of cleaned data taken between 2023-03-08 13:11:47 and 2023-03-08 13:16:11
- 21541 — 203 s of cleaned data taken between 2023-03-08 13:16:13 and 2023-03-08 13:20:36
- 21542 — 258 s of cleaned data taken between 2023-03-08 13:20:39 and 2023-03-08 14:39:07
- 21543 — 240 s of cleaned data taken between 2023-03-08 14:39:11 and 2023-03-08 14:43:33
- 21544 — 240 s of cleaned data taken between 2023-03-08 14:43:37 and 2023-03-08 14:47:59
- 21545 — 208 s of cleaned data taken between 2023-03-08 14:48:01 and 2023-03-08 14:52:25
- 21546 — 213 s of cleaned data taken between 2023-03-08 14:52:29 and 2023-03-08 14:56:52
- 21547 — 5.0 ks of cleaned data taken between 2023-03-08 14:56:55 and 2023-03-09 08:16:24
- 21548 — 240 s of cleaned data taken between 2023-03-08 16:14:33 and 2023-03-08 16:18:54
- 21549 — 240 s of cleaned data taken between 2023-03-08 16:18:57 and 2023-03-08 16:23:20
- 21550 — 208 s of cleaned data taken between 2023-03-08 16:23:24 and 2023-03-08 16:27:46
- 21551 — 213 s of cleaned data taken between 2023-03-08 16:27:50 and 2023-03-08 16:32:13
- 21552 — 235 s of cleaned data taken between 2023-03-08 17:57:07 and 2023-03-08 18:01:48
- 21553 — 203 s of cleaned data taken between 2023-03-08 18:01:50 and 2023-03-08 18:06:14
- 21554 — 105 s of cleaned data taken between 2023-03-08 18:06:16 and 2023-03-08 18:08:23
- 21557 — 213 s of cleaned data taken between 2023-03-08 17:29:08 and 2023-03-08 17:34:57
- 21558 — 240 s of cleaned data taken between 2023-03-08 17:34:59 and 2023-03-08 17:39:21
- 21559 — 240 s of cleaned data taken between 2023-03-08 17:39:25 and 2023-03-08 17:43:47
- 21560 — 240 s of cleaned data taken between 2023-03-08 17:43:51 and 2023-03-08 17:48:13
- 21561 — 240 s of cleaned data taken between 2023-03-08 17:48:17 and 2023-03-08 17:52:39
- 21562 — 240 s of cleaned data taken between 2023-03-08 17:52:43 and 2023-03-08 17:57:05
- 21563 — 218 s of cleaned data taken between 2023-03-08 15:53:02 and 2023-03-08 15:58:56
- 21564 — 240 s of cleaned data taken between 2023-03-08 15:59:00 and 2023-03-08 16:03:22
- 21565 — 240 s of cleaned data taken between 2023-03-08 16:03:25 and 2023-03-08 16:07:48
- 21566 — 240 s of cleaned data taken between 2023-03-08 16:07:50 and 2023-03-08 16:12:14
- 21567 — 203 s of cleaned data taken between 2023-03-08 14:17:10 and 2023-03-08 14:24:03
- 21568 — 240 s of cleaned data taken between 2023-03-08 14:24:07 and 2023-03-08 14:28:29
- 21569 — 240 s of cleaned data taken between 2023-03-08 14:28:33 and 2023-03-08 14:32:55
- 21570 — 240 s of cleaned data taken between 2023-03-08 14:32:59 and 2023-03-08 14:37:21
Probable afterglow details
A source was found which matches the afterglow criteria.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Dist from Fermi/GBM pos |
Exposure | Notes | Vizier |
|---|---|---|---|---|---|---|---|---|
| 2 [details] |
04h 03m 26.24s | -75° 22′ 43.8″ | 3.2′′ | Good | 26.4′ | 11.9 ks | The source is fading with 3.7-σ significance. |  |
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 5 sources have been found in the XRT data. 1 sources match catalogued sources.
| # | RA (J2000) | Dec (J2000) | Err901 | Detection Flag2 |
Dist from Fermi/GBM pos |
Exposure | Notes | Vizier |
|---|---|---|---|---|---|---|---|---|
| 1 [details] |
04h 24m 36.54s | -75° 41′ 33.7″ | 2.8′′ | Good | 1.8° | 498 s | This source may be affected by optical loading
Matches known X-ray source: XMMSL2 J042435.7-754130 (from XMM-NEWTON/XMMSLEWCLN), 4.6″ away. Matches SIMBAD source: HD 28839, 1.5″ away. |
|
| 2 [details] |
04h 03m 26.24s | -75° 22′ 43.8″ | 3.2′′ | Good | 26.4′ | 11.9 ks | The source is fading with 3.7-σ significance. | |
| 3 [details] |
04h 03m 57.67s | -75° 21′ 27.7″ | 6.1′′ | Reasonable | 27.9′ | 11.9 ks | |
|
| 4 [details] |
04h 04m 24.89s | -75° 28′ 00.8″ | 8.5′′ | Poor | 31.9′ | 11.9 ks | |
|
| 5 [details] |
04h 05m 12.23s | -75° 15′ 26.8″ | 6.7′′ | Good | 31.7′ | 11.7 ks | |
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.
