GRB 161015A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	269.150°
GRB Dec:	+30.190°
GRB Err:	12.6 arcmin
T0:	2016-10-15 17:02:49 UT
Galactic:	55.80° +24.31°
Galactic N_H:	4.05× 10²⁰ cm^-2
Galactic E(B-V):	0.04792971

Sun distance:	76.03°
Sun angle:	4.54 [hr] (East of Sun)
Moon distance:	102.54°
Visibility of this field.
First slew:	2016-09-11 03:05:06 UT
First observation:	2016-10-16 03:34:54 UT
First analysis:	UT

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 4 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.

20704 — 1.2 ks of cleaned data taken between 2016-10-16 03:35:41 and 2016-10-16 05:42:37
20705 — 1.2 ks of cleaned data taken between 2016-10-16 03:46:42 and 2016-10-16 05:52:53
20706 — 1.2 ks of cleaned data taken between 2016-10-16 03:57:40 and 2016-10-16 05:21:22
20707 — 1.2 ks of cleaned data taken between 2016-10-16 04:08:28 and 2016-10-16 05:32:37

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.

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
1 [details]	17h 57m 00.43s269.25178°	+30° 22′ 24.8″30.37356°	2.7′′	Good	12.2′	6.2 ks	The source is fading with 4.6-σ significance.
Mean XRT rate: 6.3 (±1.3) ×10^-3 ct s^-1 Peak XRT rate: 3.0 (±0.6) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.3 (±0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.6 (±0.3) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position Expected serendipitous sources: ~0.9 [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 8 sources have been found in the XRT data. 0 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes
1 [details]	17h 57m 00.43s269.25178°	+30° 22′ 24.8″30.37356°	2.7′′	Good	12.2′	6.2 ks	The source is fading with 4.6-σ significance.
Mean XRT rate: 6.3 (±1.3) ×10^-3 ct s^-1 Peak XRT rate: 3.0 (±0.6) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.3 (±0.7) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.6 (±0.3) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position Expected serendipitous sources: ~0.9 [What is this?]
2 [details]	17h 57m 27.59s269.36497°	+30° 24′ 03.2″30.40088°	6.4′′	Good	16.9′	1.2 ks	This source may be affected by optical loading
Mean XRT rate: 1.2 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.2 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 9.7×10^-3 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.4 [What is this?]
3 [details]	17h 57m 27.34s269.36391°	+30° 21′ 03.9″30.35109°	3.6′′	Reasonable	14.7′	2.3 ks
Mean XRT rate: 5.9 (+2.4, -1.9) ×10^-3 ct s^-1 Peak XRT rate: 5.9 (+2.4, -1.9) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.8 [What is this?]
4 [details]	17h 57m 29.14s269.37142°	+30° 23′ 43.4″30.39539°	4.7′′	Good	16.8′	1.2 ks	This source may be affected by optical loading
Mean XRT rate: 1.7 (+0.6, -0.5) ×10^-2 ct s^-1 Peak XRT rate: 1.7 (+0.6, -0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.2 [What is this?]
5 [details]	17h 57m 28.30s269.36792°	+30° 25′ 24.6″30.42349°	3.1′′	Good	18.0′	1.2 ks	This source may be affected by optical loading
Mean XRT rate: 1.5 (+0.6, -0.5) ×10^-2 ct s^-1 Peak XRT rate: 1.5 (+0.6, -0.5) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 8.8×10^-3 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.3 [What is this?]
6 [details]	17h 57m 26.52s269.36051°	+30° 20′ 12.1″30.33669°	3.7′′	Reasonable	14.0′	2.3 ks
Mean XRT rate: 5.4 (+2.4, -1.8) ×10^-3 ct s^-1 Peak XRT rate: 5.4 (+2.4, -1.8) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 9.2×10^-3 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.7 [What is this?]
7 [details]	17h 57m 27.65s269.36522°	+30° 24′ 40.6″30.41129°	4.7′′	Good	17.3′	1.2 ks	This source may be affected by optical loading
Mean XRT rate: 1.5 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.5 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.3 [What is this?]
8 [details]	17h 57m 28.85s269.37021°	+30° 22′ 58.8″30.38299°	5.3′′	Reasonable	16.3′	1.2 ks	This source may be affected by optical loading
Mean XRT rate: 1.4 (+0.5, -0.4) ×10^-2 ct s^-1 Peak XRT rate: 1.4 (+0.5, -0.4) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.01 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Enhanced position Expected serendipitous sources: ~0.3 [What is this?]

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FITS exposure map.