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Home > GRB products > GRB 180809A

TILED_GRB00072

NEWGRB

72

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GRB 180809A: Swift observation summary

Source 1 has been manually confirmed as the GRB afterglow; data for this object are now available through the main GRB results area for this GRB.

About tiled field analysis.

So far 6 fields have been scheduled for observations. Data are available and processed for 7 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.

• 20814 — 448 s of cleaned data taken between 2018-08-09 15:26:45 and 2018-08-09 18:46:04
• 20815 — 443 s of cleaned data taken between 2018-08-09 16:04:03 and 2018-08-09 18:47:17
• 20816 — 443 s of cleaned data taken between 2018-08-09 16:05:09 and 2018-08-09 18:42:01
• 20817 — 443 s of cleaned data taken between 2018-08-09 16:06:14 and 2018-08-09 18:43:25
• 20818 — 468 s of cleaned data taken between 2018-08-09 16:07:21 and 2018-08-09 18:40:32
• 20819 — 446 s of cleaned data taken between 2018-08-09 17:03:00 and 2018-08-09 18:44:48
• 20820 — 461 s of cleaned data taken between 2018-08-09 17:09:08 and 2018-08-09 17:41:56

Probable afterglow details

A source was found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from MAXI pos	Exposure	Notes	Vizier
1 [details]	19h 51m 36.71s297.90295°	-34° 47′ 07.5″-34.78541°	2.2′′	Good	9.1′	892 s	The source is 5.1-σ above the RASS limit.
Mean XRT rate: 0.205 (+0.021, -0.020) ct s-1 Peak XRT rate: 0.23 (±0.04) ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (XRT equiv count-rate) Mean XRT flux: 6.5 (+0.7, -0.6) ×10-12 erg cm-1s-1 Peak XRT flux: 7.4 (±1.2) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~8.75×10-3 [What is this?]

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 1 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from MAXI pos	Exposure	Notes	Vizier
1 [details]	19h 51m 36.71s297.90295°	-34° 47′ 07.5″-34.78541°	2.2′′	Good	9.1′	892 s	The source is 5.1-σ above the RASS limit.
Mean XRT rate: 0.205 (+0.021, -0.020) ct s-1 Peak XRT rate: 0.23 (±0.04) ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (XRT equiv count-rate) Mean XRT flux: 6.5 (+0.7, -0.6) ×10-12 erg cm-1s-1 Peak XRT flux: 7.4 (±1.2) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~8.75×10-3 [What is this?]

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.