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Home > GRB products > GRB 200412B

TILED_GRB00089

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GRB 200412B: Swift observation summary

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.

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.

• 20981 — 661 s of cleaned data taken between 2020-04-12 14:36:48 and 2020-04-12 17:50:58
• 20982 — 712 s of cleaned data taken between 2020-04-12 14:42:52 and 2020-04-12 17:56:26
• 20983 — 709 s of cleaned data taken between 2020-04-12 14:48:56 and 2020-04-12 17:55:21
• 20984 — 707 s of cleaned data taken between 2020-04-12 14:54:59 and 2020-04-12 17:53:09
• 20985 — 707 s of cleaned data taken between 2020-04-12 15:00:56 and 2020-04-12 17:54:14
• 20986 — 712 s of cleaned data taken between 2020-04-12 15:06:49 and 2020-04-12 17:52:03
• 20987 — 646 s of cleaned data taken between 2020-04-12 15:12:31 and 2020-04-12 17:49:52

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
2 [details]	18h 33m 15.21s278.31339°	+62° 31′ 57.1″62.53253°	2.5′′	Good	30.1′	712 s	The source is 10.2-σ above the RASS limit.
Mean XRT rate: 0.174 (±0.020) ct s-1 Peak XRT rate: 0.24 (±0.05) ct s-1 RASS PSPC 3-σ upper limit: 7.4×10-3 ct s-1 (XRT equiv count-rate) Mean XRT flux: 5.4 (±0.6) ×10-12 erg cm-1s-1 Peak XRT flux: 7.6 (±1.4) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~1.14×10-2 [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.

Find an upper limit.

Sources found so far

So far 5 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]	18h 25m 32.84s276.38682°	+62° 34′ 12.6″62.57018°	2.9′′	Good	24.5′	707 s	Matches known X-ray source: XMMSL2 J182532.1+623418 (from XMM-NEWTON/XMMSLEWCLN), 4″ away. Matches SIMBAD source: RX J1825.5+6234, 7.2″ away.
Mean XRT rate: 6.4 (+1.2, -1.1) ×10-2 ct s-1 Peak XRT rate: 6.4 (±1.2) ×10-2 ct s-1 RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (XRT equiv count-rate) Mean XRT flux: 1.35 (±0.24) ×10-12 erg cm-1s-1 Peak XRT flux: 1.34 (±0.25) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~0.06 [What is this?]
2 [details]	18h 33m 15.21s278.31339°	+62° 31′ 57.1″62.53253°	2.5′′	Good	30.1′	712 s	The source is 10.2-σ above the RASS limit.
Mean XRT rate: 0.174 (±0.020) ct s-1 Peak XRT rate: 0.24 (±0.05) ct s-1 RASS PSPC 3-σ upper limit: 7.4×10-3 ct s-1 (XRT equiv count-rate) Mean XRT flux: 5.4 (±0.6) ×10-12 erg cm-1s-1 Peak XRT flux: 7.6 (±1.4) ×10-12 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position Expected serendipitous sources: ~1.14×10-2 [What is this?]
3 [details]	18h 31m 06.19s277.77578°	+62° 14′ 07.0″62.23527°	7.1′′	Poor	29.1′	709 s	This source may be affected by optical loading Matches known X-ray source: 1RXS J183108.6+621414 (from ROSAT/RASSFSC), 18.3″ away.
Mean XRT rate: 9 (+7, -4) ×10-3 ct s-1 Peak XRT rate: 9 (+7, -4) ×10-3 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: ~0.4 [What is this?]
4 [details]	18h 30m 29.21s277.62171°	+62° 41′ 05.8″62.68494°	5.7′′	Reasonable	10.2′	1.4 ks
Mean XRT rate: 4.5 (+3.4, -2.3) ×10-3 ct s-1 Peak XRT rate: 4.5 (+3.4, -2.3) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 5.4×10-3 ct s-1 (XRT equiv count-rate) Products: Light curve Expected serendipitous sources: ~1.44×10-2 [What is this?]
5 [details]	18h 31m 07.04s277.77935°	+62° 14′ 33.8″62.24273°	9.2′′	Poor	28.8′	709 s	This source may be affected by optical loading Matches known X-ray source: XMMSL2 J183109.8+621450 (from XMM-NEWTON/XMMSLEWCLN), 25″ away.
Mean XRT rate: 5.1 (+4.8, -2.9) ×10-3 ct s-1 Peak XRT rate: 5.1 (+4.8, -2.9) ×10-3 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: ~1.64×10-2 [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.