GRB 201008A: Swift observation summary

Mission:	Fermi/GBM
GRB RA:	161.744°
GRB Dec:	+46.101°
GRB Err:	3.0 arcmin
T0:	2020-10-08 10:37:36 UT
Galactic:	166.97° +58.97°
Galactic N_H:	1.58× 10²⁰ cm^-2
Galactic E(B-V):	0.02028633

Sun distance:	59.77°
Sun angle:	2.18 [hr](West of Sun)
Moon distance:	62.62°
Visibility of this field.

Data analysed so far:

ObsID: 00021034001 with 5.0 ks exposure.

Source 4 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 Fermi/GBM pos	Exposure	Notes	Vizier
4 [details]	10h 47m 26.10s161.85876°	+46° 06′ 06.9″46.10191°	4.8′′	Good	4.8′	13.6 ks	The source is fading with 3.8-σ significance.
Mean XRT rate: 4.3 (±1.1) ×10^-3 ct s^-1 Peak XRT rate: 4.3 (±1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.6 (±2.3) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8.6 (±2.3) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.1 [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. 4 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from Fermi/GBM pos	Exposure	Notes
1 [details]	10h 47m 01.02s161.75426°	+46° 08′ 51.1″46.14752°	5.1′′	Good	2.8′	13.6 ks	Matches SIMBAD source: SDSS J104701.20+460848.8, 2.9″ away.
Mean XRT rate: 1.8 (±0.5) ×10^-3 ct s^-1 Peak XRT rate: 1.8 (±0.5) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.6 (±1.5) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.6 (±1.5) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.4 [What is this?]
2 [details]	10h 47m 22.39s161.84330°	+45° 57′ 04.4″45.95122°	5.7′′	Reasonable	9.9′	10.8 ks
Mean XRT rate: 8 (+5, -3) ×10^-4 ct s^-1 Peak XRT rate: 8 (+5, -3) ×10^-4 ct s^-1 RASS PSPC 3-σ upper limit: 0.11 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.6 (+3.0, -2.3) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 5.6 (+3.0, -2.3) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
3 [details]	10h 46m 42.01s161.67506°	+46° 10′ 19.2″46.17200°	4.5′′	Good	5.1′	13.6 ks	Matches SIMBAD source: SDSS J104641.99+461014.6, 4.6″ away.
Mean XRT rate: 2.9 (+0.6, -0.5) ×10^-3 ct s^-1 Peak XRT rate: 3.6 (±0.9) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 1.07 (+0.22, -0.20) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 1.4 (±0.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.2 [What is this?]
4 [details]	10h 47m 26.10s161.85876°	+46° 06′ 06.9″46.10191°	4.8′′	Good	4.8′	13.6 ks	The source is fading with 3.8-σ significance.
Mean XRT rate: 4.3 (±1.1) ×10^-3 ct s^-1 Peak XRT rate: 4.3 (±1.1) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 8.6 (±2.3) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 8.6 (±2.3) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.1 [What is this?]
5 [details]	10h 47m 18.32s161.82633°	+45° 59′ 13.0″45.98694°	5.6′′	Poor	7.7′	13.6 ks	Matches SIMBAD source: SDSS J104718.47+455909.2, 4.1″ away.
Mean XRT rate: 1.2 (+0.5, -0.4) ×10^-3 ct s^-1 Peak XRT rate: 1.2 (+0.5, -0.4) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.05 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 3.2 (+1.2, -1.0) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 3.2 (+1.2, -1.0) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~0.00×10⁺⁰ [What is this?]
6 [details]	10h 46m 30.11s161.62545°	+46° 14′ 21.8″46.23939°	5.7′′	Good	9.7′	13.6 ks	Matches SIMBAD source: SDSS J104630.28+461414.9, 7.3″ away.
Mean XRT rate: 2.1 (±0.5) ×10^-3 ct s^-1 Peak XRT rate: 2.1 (±0.6) ×10^-3 ct s^-1 RASS PSPC 3-σ upper limit: 0.02 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 6.8 (+1.8, -1.6) ×10^-14 erg cm^-1s^-1 Peak XRT flux: 6.8 (±1.9) ×10^-14 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Expected serendipitous sources: ~1.2 [What is this?]
7 [details]	10h 47m 27.10s161.86293°	+45° 59′ 47.0″45.99638°	4.8′′	Good	8.0′	13.6 ks
Mean XRT rate: 6.1 (+3.4, -2.6) ×10^-4 ct s^-1 Peak XRT rate: 6.1 (+3.4, -2.6) ×10^-4 ct s^-1 RASS PSPC 3-σ upper limit: 0.03 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.00×10⁺⁰ [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.

Exposure map

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FITS exposure map.