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Home > Einstein Probe follow up > EP#01709177873

EP_FIELD00042

EP

42

/EP

EP#01709177873: Swift observation summary

Data analysed so far:

• ObsID: 00019855001 with 2.0 ks exposure.

About tiled field analysis.

So far 1 fields have been scheduled for observations. Data are available and processed for 1 of these.

1 fields were processed but not included in the analysis. This is because, after standard processing and the removal of times contaminated by light reflected off the bright Earth, there was too little data (<100 s) for source detection to be performed.

Details of afterglow candidates

1 sources were found which matches the afterglow criteria.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Exposure	Notes	Vizier
1 [details]	15h 53m 04.55s238.26897°	+44° 57′ 46.8″44.96301°	2.5′′ *	Good	2 (O)	1.3′	2.0 ks	Matches SIMBAD source: RX J1553.0+4457, 3.1″ away. Matches known X-ray source: XMMSL3 J155304.3+445748 (from XMM-NEWTON/XMMSLEWCLN), 3.3593357439391″ away.
Mean XRT rate: 1.04 (±0.03) ct s-1 Peak XRT rate: 1.8 (±0.4) ct s-1 -4.20 σ above the catalogued flux from XMM-NEWTON/XMMSLEWCLN. RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.40 (±0.05) ct s-1 Peak XRT rate converted to PSPC: 2.4 (±0.5) ct s-1 Mean XRT flux: 3.46 (±0.11) ×10-11 erg cm-1s-1 Peak XRT flux: 5.9 (±1.3) ×10-11 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.
³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
^* 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 2 sources have been found in the XRT data. 2 sources match catalogued sources.

#	RA (J2000)	Dec (J2000)	Err901	Detection Flag2	Rank3	Dist from Einstein Probe/WXT pos	Exposure	Notes	Vizier
1 [details]	15h 53m 04.55s238.26897°	+44° 57′ 46.8″44.96301°	2.5′′ *	Good	2 (O)	1.3′	2.0 ks	Matches SIMBAD source: RX J1553.0+4457, 3.1″ away. Matches known X-ray source: XMMSL3 J155304.3+445748 (from XMM-NEWTON/XMMSLEWCLN), 3.3593357439391″ away.
Mean XRT rate: 1.04 (±0.03) ct s-1 Peak XRT rate: 1.8 (±0.4) ct s-1 -4.20 σ above the catalogued flux from XMM-NEWTON/XMMSLEWCLN. RASS PSPC 3-σ upper limit: 0.0×100 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.40 (±0.05) ct s-1 Peak XRT rate converted to PSPC: 2.4 (±0.5) ct s-1 Mean XRT flux: 3.46 (±0.11) ×10-11 erg cm-1s-1 Peak XRT flux: 5.9 (±1.3) ×10-11 erg cm-1s-1 Products: Light curve | Spectrum | Enhanced position
2 [details]	15h 53m 58.53s238.49386°	+44° 59′ 23.7″44.98991°	6.2′′	Good	3 (U)	11.0′	2.0 ks	Matches SIMBAD source: SDSS J155358.58+445923.6, 0.6″ away.
Mean XRT rate: 8.4 (+3.4, -2.7) ×10-3 ct s-1 Peak XRT rate: 8.4 (+3.4, -2.7) ×10-3 ct s-1 RASS PSPC 3-σ upper limit: 0.27 ct s-1 (PSPC count-rate) Mean XRT rate converted to PSPC: 1.0 (+0.4, -0.3) ×10-3 ct s-1 Peak XRT rate converted to PSPC: 1.0 (+0.4, -0.3) ×10-3 ct s-1 Mean XRT flux: 3.05 (+1.25, -0.99) ×10-11 erg cm-1s-1 Peak XRT flux: 3.05 (+1.25, -0.99) ×10-11 erg cm-1s-1 Products: Light curve | Spectrum

¹ Radius, 90% confidence.
² Indicates how likely the source is to be real. See the LSXPS documentation.
³ T=Transient Source, O=Outbursting known source, U=Uncatalogued X-ray source, K=Known X-ray source.
^* 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.