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Home > GRB products > GRB 210520A

TILED_GRB00099

NEWGRB

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GRB 210520A: Swift observation summary

About tiled field analysis.

So far 19 fields have been scheduled for observations. Data are available and processed for 19 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.

• 21431 — 298 s of cleaned data taken between 2021-05-21 06:46:48 and 2021-05-21 06:54:06
• 21432 — 270 s of cleaned data taken between 2021-05-21 06:54:09 and 2021-05-21 06:59:33
• 21433 — 303 s of cleaned data taken between 2021-05-21 06:59:37 and 2021-05-21 07:05:00
• 21434 — 303 s of cleaned data taken between 2021-05-21 07:05:05 and 2021-05-21 07:10:29
• 21435 — 303 s of cleaned data taken between 2021-05-21 07:10:33 and 2021-05-21 07:15:56
• 21436 — 298 s of cleaned data taken between 2021-05-21 08:17:34 and 2021-05-21 08:24:52
• 21437 — 303 s of cleaned data taken between 2021-05-21 08:24:55 and 2021-05-21 08:30:20
• 21438 — 270 s of cleaned data taken between 2021-05-21 08:30:23 and 2021-05-21 08:35:47
• 21439 — 300 s of cleaned data taken between 2021-05-21 08:35:51 and 2021-05-21 08:41:16
• 21440 — 303 s of cleaned data taken between 2021-05-21 08:41:20 and 2021-05-21 08:46:47
• 21441 — 303 s of cleaned data taken between 2021-05-21 08:46:49 and 2021-05-21 08:52:16
• 21442 — 303 s of cleaned data taken between 2021-05-21 08:52:18 and 2021-05-21 08:57:42
• 21443 — 295 s of cleaned data taken between 2021-05-21 09:57:34 and 2021-05-21 10:04:09
• 21444 — 270 s of cleaned data taken between 2021-05-21 10:04:13 and 2021-05-21 10:09:37
• 21445 — 303 s of cleaned data taken between 2021-05-21 10:09:42 and 2021-05-21 10:15:07
• 21446 — 295 s of cleaned data taken between 2021-05-21 10:28:34 and 2021-05-21 10:34:57
• 21447 — 295 s of cleaned data taken between 2021-05-21 11:42:34 and 2021-05-21 11:49:30
• 21448 — 303 s of cleaned data taken between 2021-05-21 11:49:34 and 2021-05-21 11:54:59
• 21449 — 300 s of cleaned data taken between 2021-05-21 11:55:02 and 2021-05-21 12:00:27

Details of afterglow candidates

2 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from LAT pos	Exposure	Notes	Vizier
2 [details]	08h 08m 28.90s122.12040°	-69° 46′ 00.5″-69.76681°	7.7′′	Reasonable	28.7′	303 s	The source is 4.6-σ above the RASS limit.
Mean XRT rate: 1.95 (+1.19, -0.85) ×10-2 ct s-1 Peak XRT rate: 1.95 (+1.19, -0.85) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Products: Light curve | Spectrum
3 [details]	08h 17m 53.22s124.47176°	-69° 17′ 46.8″-69.29635°	8.6′′	Good	31.8′	303 s	The source is 5.1-σ above the RASS limit.
Mean XRT rate: 3.0 (+1.6, -1.1) ×10-2 ct s-1 Peak XRT rate: 3.0 (+1.6, -1.1) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Products: Light curve Expected serendipitous sources: ~0.5 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-18.60°

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.

Find an upper limit.

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	Dist from LAT pos	Exposure	Notes	Vizier
1 [details]	08h 08m 37.75s122.15729°	-69° 47′ 11.2″-69.78645°	4.7′′	Good	29.1′	303 s	Matches known X-ray source: XMMSL2 J080836.9-694717 (from XMM-NEWTON/XMMSLEWCLN), 4.0896726847054″ away.
Mean XRT rate: 2.9 (+1.4, -1.1) ×10-2 ct s-1 Peak XRT rate: 2.9 (+1.4, -1.1) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Mean XRT flux: 2.8 (+1.3, -1.0) ×10-12 erg cm-1s-1 Peak XRT flux: 2.8 (+1.3, -1.0) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~0.5 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-18.60°
2 [details]	08h 08m 28.90s122.12040°	-69° 46′ 00.5″-69.76681°	7.7′′	Reasonable	28.7′	303 s	The source is 4.6-σ above the RASS limit.
Mean XRT rate: 1.95 (+1.19, -0.85) ×10-2 ct s-1 Peak XRT rate: 1.95 (+1.19, -0.85) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Products: Light curve | Spectrum
3 [details]	08h 17m 53.22s124.47176°	-69° 17′ 46.8″-69.29635°	8.6′′	Good	31.8′	303 s	The source is 5.1-σ above the RASS limit.
Mean XRT rate: 3.0 (+1.6, -1.1) ×10-2 ct s-1 Peak XRT rate: 3.0 (+1.6, -1.1) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Products: Light curve Expected serendipitous sources: ~0.5 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-18.60°
4 [details]	08h 16m 12.96s124.05401°	-69° 37′ 20.3″-69.62232°	11.1′′	Poor	25.8′	599 s	The source is 5.1-σ above the RASS limit.
Mean XRT rate: 1.4 (+0.8, -0.6) ×10-2 ct s-1 Peak XRT rate: 1.4 (+0.8, -0.6) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Products: Light curve Expected serendipitous sources: ~0.3 [What is this?] Note: this is extragalactic sources only, whereas the GRB trigger is at b=-18.60°

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

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FITS image.

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Exposure map

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FITS exposure map.