GRB 191016A: Swift observation summary

Mission:	Swift/BAT
GRB RA:	30.296°
GRB Dec:	+24.501°
GRB Err:	3.0 arcmin
T0:	2019-10-16 04:09:00 UT
Galactic:	142.55° -35.70°
Galactic N_H:	7.45× 10²⁰ cm^-2
Galactic E(B-V):	0.09856375

Sun distance:	161.84°
Sun angle:	11.37 [hr](West of Sun)
Moon distance:	19.30°
Visibility of this field.

Data analysed so far:

ObsID: 00929744001 with 4.2 ks exposure.

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 ToO analysis.

Probable afterglow details

A source was found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes	Vizier
3 [details]	02h 01m 04.64s30.26933°	+24° 30′ 35.6″24.50988°	1.9′′	Good	1.6′	4.2 ks	The source is 3.8-σ above the 2SXPS limit.
Mean XRT rate: 2.31 (+0.29, -0.28) ×10^-2 ct s^-1 Peak XRT rate: 4.3 (±1.1) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.08 (+1.00, -0.98) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (±0.4) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~3.75×10^-3 [What is this?]

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the 2SXPS 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 7 sources have been found in the XRT data. 5 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Swift/BAT pos	Exposure	Notes
1 [details]	02h 01m 47.54s30.44810°	+24° 26′ 31.2″24.44199°	9.0′′	Good	9.0′	4.2 ks
Mean XRT rate: 2.41 (+1.24, -0.94) ×10^-3 ct s^-1 Peak XRT rate: 2.41 (+1.24, -0.94) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.9 (+1.5, -1.1) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 2.9 (+1.5, -1.1) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.6 [What is this?]
2 [details]	02h 00m 59.25s30.24689°	+24° 31′ 52.9″24.53135°	5.7′′	Good	3.2′	4.2 ks	Matches known X-ray source: 1SXPS J020059.3+243149 (from 1SXPS), 4″ away.
Mean XRT rate: 3.5 (+1.4, -1.1) ×10^-3 ct s^-1 Peak XRT rate: 3.5 (+1.4, -1.1) ×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 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.4 (+0.5, -0.4) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.06 [What is this?]
3 [details]	02h 01m 04.64s30.26933°	+24° 30′ 35.6″24.50988°	1.9′′	Good	1.6′	4.2 ks	The source is 3.8-σ above the 2SXPS limit.
Mean XRT rate: 2.31 (+0.29, -0.28) ×10^-2 ct s^-1 Peak XRT rate: 4.3 (±1.1) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.08 (+1.00, -0.98) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.5 (±0.4) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~3.75×10^-3 [What is this?]
4 [details]	02h 00m 19.21s30.08005°	+24° 28′ 25.4″24.47371°	4.1′′	Good	11.9′	4.2 ks	Matches known X-ray source: 1SXPS J020018.8+242823 (from 1SXPS), 2″ away. Matches SIMBAD source: UGC 1479, 3.3″ away.
Mean XRT rate: 8.0 (±1.9) ×10^-3 ct s^-1 Peak XRT rate: 8.0 (±1.9) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.1 (±0.5) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 2.1 (±0.5) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.3 [What is this?]
5 [details]	02h 00m 16.46s30.06857°	+24° 35′ 41.3″24.59481°	2.0′′	Good	13.6′	1.9 ks	Matches known X-ray source: 1SXPS J020016.3+243543 (from 1SXPS), 1″ away. Matches SIMBAD source: BD+23 268, 2.1″ away.
Mean XRT rate: 5.9 (±0.7) ×10^-2 ct s^-1 Peak XRT rate: 8.5 (±2.2) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.10 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.20 (±0.15) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 1.7 (±0.4) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~1.46×10^-2 [What is this?]
6 [details]	02h 01m 10.29s30.29289°	+24° 26′ 38.1″24.44393°	2.2′′	Good	3.4′	4.2 ks	This source may be affected by optical loading Matches known X-ray source: 1SXPS J020110.1+242636 (from 1SXPS), 4″ away. Matches SIMBAD source: HD 12306, 5.7″ away.
Mean XRT rate: 7.1 (+1.7, -1.5) ×10^-3 ct s^-1 Peak XRT rate: 1.2 (+0.7, -0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.22 (+0.29, -0.27) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 2.08 (+1.28, -0.91) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~0.03 [What is this?]
7 [details]	02h 00m 47.48s30.19784°	+24° 32′ 18.7″24.53852°	6.6′′	Good	5.8′	4.2 ks	Matches known X-ray source: 1SXPS J020047.5+243220 (from 1SXPS), 2.3″ away.
Mean XRT rate: 3.4 (+1.3, -1.0) ×10^-3 ct s^-1 Peak XRT rate: 3.4 (+1.3, -1.0) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.2 [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.

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Exposure map

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FITS exposure map.