GRB 170214A: Swift observation summary

Mission:	Fermi/LAT
GRB RA:	256.330°
GRB Dec:	-1.880°
GRB Err:	4.8 arcmin
T0:	2017-02-14 15:34:07 UT
Galactic:	18.34° +22.48°
Galactic N_H:	9.50× 10²⁰ cm^-2
Galactic E(B-V):	0.3542725

Sun distance:	72.08°
Sun angle:	4.80 [hr](West of Sun)
Moon distance:	65.94°
Visibility of this field.

Data analysed so far:

ObsID: 00020740001 with 4.9 ks exposure.

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 ToO analysis.

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 05m 21.95s256.34147°	-01° 53′ 14.9″-1.88746°	2.4′′	Good	0.8′	10.4 ks	The source is fading with 6.8-σ significance. The source is 4.9-σ above the RASS limit.
Mean XRT rate: 1.31 (±0.21) ×10^-2 ct s^-1 Peak XRT rate: 1.5 (±0.3) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.5 (±0.9) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 6.3 (±1.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~1.90×10^-2 [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 3 sources have been found in the XRT data. 1 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err₉₀¹	Detection Flag²	Dist from LAT pos	Exposure	Notes
1 [details]	17h 05m 21.95s256.34147°	-01° 53′ 14.9″-1.88746°	2.4′′	Good	0.8′	10.4 ks	The source is fading with 6.8-σ significance. The source is 4.9-σ above the RASS limit.
Mean XRT rate: 1.31 (±0.21) ×10^-2 ct s^-1 Peak XRT rate: 1.5 (±0.3) ×10^-2 ct s^-1 RASS PSPC 3-σ upper limit: 0.04 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 5.5 (±0.9) ×10^-13 erg cm^-1s^-1 Peak XRT flux: 6.3 (±1.3) ×10^-13 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~1.90×10^-2 [What is this?]
2 [details]	17h 05m 08.59s256.28579°	-01° 47′ 11.1″-1.78643°	1.9′′	Good	6.2′	10.4 ks	Matches known X-ray source: XMMSL1 J170508.8-014708 (from XMM-NEWTON/XMMSLEWCLN), 4.9″ away. Matches SIMBAD source: HD 154361, 2.3″ away.
Mean XRT rate: 0.110 (±0.004) ct s^-1 Peak XRT rate: 0.25 (±0.05) ct s^-1 RASS PSPC 3-σ upper limit: 0.50 ct s^-1 (XRT equiv count-rate) Mean XRT flux: 2.28 (±0.08) ×10^-12 erg cm^-1s^-1 Peak XRT flux: 5.2 (±1.1) ×10^-12 erg cm^-1s^-1 Products: Light curve \| Spectrum \| Enhanced position \| Expected serendipitous sources: ~1.12×10^-3 [What is this?]
3 [details]	17h 05m 32.95s256.38729°	-02° 00′ 40.8″-2.01133°	8.8′′	Poor	8.6′	9.9 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: 0.02 ct s^-1 (XRT equiv count-rate) Products: Light curve \| Expected serendipitous sources: ~0.7 [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.