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Home > GRB products > GRB 200826A

TILED_GRB00093

NEWGRB

93

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GRB 200826A: Swift observation summary

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.

About tiled field analysis.

So far 3 fields have been scheduled for observations. Data are available and processed for 4 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.

• 21028 — 1.9 ks of cleaned data taken between 2020-08-26 20:45:55 and 2020-08-27 01:57:57
• 21029 — 1.8 ks of cleaned data taken between 2020-08-26 20:57:09 and 2020-08-27 03:20:31
• 21030 — 1.8 ks of cleaned data taken between 2020-08-26 21:08:32 and 2020-08-27 03:17:58
• 21031 — 1.9 ks of cleaned data taken between 2020-08-26 21:19:26 and 2020-08-27 03:19:49

An additional 1 field has also been used for follow up observations. These data are not searched for sources, but are used to update the light curves etc of any sources already found.

Find an upper limit.

Sources found so far

So far 8 sources have been found in the XRT data. 3 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Dist from Fermi/GBM pos	Exposure	Notes	Vizier
1 [details]	00h 26m 49.84s6.70765°	+33° 57′ 43.3″33.96202°	6.2′′	Good	7.1′	10.3 ks
Mean XRT rate: 2.2 (±0.6) ×10-3 ct s-1 Peak XRT rate: 2.2 (±0.6) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.05 ct s-1 (XRT equiv count-rate) Mean XRT flux: 6.7 (±1.8) ×10-14 erg cm-1s-1 Peak XRT flux: 6.7 (±1.8) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum Expected serendipitous sources: ~1.4 [What is this?]
2 [details]	00h 25m 46.33s6.44305°	+34° 01′ 07.5″34.01875°	5.9′′	Reasonable	18.6′	1.9 ks
Mean XRT rate: 3.7 (+2.0, -1.5) ×10-3 ct s-1 Peak XRT rate: 3.7 (+2.0, -1.5) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (XRT equiv count-rate) Products: Light curve Expected serendipitous sources: ~1.7 [What is this?]
3 [details]	00h 27m 08.32s6.78466°	+34° 01′ 36.1″34.02670°	3.3′′	Good	1.7′	10.6 ks
Mean XRT rate: 10.0 (+1.3, -1.2) ×10-3 ct s-1 Peak XRT rate: 2.1 (±0.5) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.05 ct s-1 (XRT equiv count-rate) Mean XRT flux: 3.4 (±0.4) ×10-13 erg cm-1s-1 Peak XRT flux: 7.1 (±1.9) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~0.6 [What is this?]
4 [details]	00h 27m 38.59s6.91078°	+34° 08′ 45.5″34.14597°	6.3′′	Good	8.0′	10.3 ks	Matches known X-ray source: 1RXS J002736.3+340836 (from ROSAT/RASSFSC), 27.1″ away.
Mean XRT rate: 5.0 (±0.9) ×10-3 ct s-1 Peak XRT rate: 5.0 (±1.0) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Mean XRT flux: 1.9 (±0.3) ×10-13 erg cm-1s-1 Peak XRT flux: 1.8 (±0.4) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~1.6 [What is this?]
5 [details]	00h 26m 40.95s6.67062°	+34° 11′ 01.5″34.18375°	3.8′′	Good	11.4′	10.4 ks	This source may be affected by optical loading Matches SIMBAD source: HD 2265, 1.4″ away.
Mean XRT rate: 6.4 (±1.0) ×10-3 ct s-1 Peak XRT rate: 7.9 (±1.8) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.02 ct s-1 (XRT equiv count-rate) Products: Light curve | Enhanced position Expected serendipitous sources: ~1.1 [What is this?]
6 [details]	00h 26m 29.52s6.62298°	+34° 06′ 45.3″34.11260°	5.1′′	Good	10.6′	8.5 ks
Mean XRT rate: 2.5 (±0.7) ×10-3 ct s-1 Peak XRT rate: 2.5 (±0.7) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (XRT equiv count-rate) Mean XRT flux: 1.4 (±0.4) ×10-13 erg cm-1s-1 Peak XRT flux: 1.4 (±0.4) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum Expected serendipitous sources: ~1.2 [What is this?]
7 [details]	00h 27m 14.91s6.81212°	+34° 02′ 33.3″34.04260°	4.9′′	Poor	0.4′	11.7 ks
Mean XRT rate: 1.8 (+0.7, -0.5) ×10-3 ct s-1 Peak XRT rate: 1.8 (+0.7, -0.5) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.04 ct s-1 (XRT equiv count-rate) Mean XRT flux: 4.6 (+1.7, -1.4) ×10-14 erg cm-1s-1 Peak XRT flux: 4.6 (+1.7, -1.4) ×10-14 erg cm-1s-1 Products: Light curve | Spectrum Expected serendipitous sources: ~0.05 [What is this?]
8 [details]	00h 27m 42.48s6.92700°	+34° 17′ 57.1″34.29919°	4.9′′	Good	16.6′	1.6 ks	Matches SIMBAD source: SDSS J002742.86+341800.4, 5.8″ away.
Mean XRT rate: 6.0 (+2.7, -2.1) ×10-3 ct s-1 Peak XRT rate: 6.0 (+2.7, -2.1) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.03 ct s-1 (XRT equiv count-rate) Mean XRT flux: 2.30 (+1.03, -0.80) ×10-13 erg cm-1s-1 Peak XRT flux: 2.30 (+1.03, -0.80) ×10-13 erg cm-1s-1 Products: Light curve | Spectrum Expected serendipitous sources: ~1.2 [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.