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Einstein Probe trigger EP#01709177124
Source 1 (SWIFT J155741.3-793911)

Image of the XRT detection

This source is detected in 1 block. Show all images.

Image of the LC

Spectrum

Image of the spectrum

Enhanced position

Image of the UVOT image
Source details
Rank/Classification: 4: Known X-ray Source
RA (J2000):15h 57m 40.27s (= 239.41778°)
Dec (J2000):-79° 39′ 14.3″ (= -79.6540°)
Error (radius, 90%):4.0″ (enhanced position)
Detection flag:Good
XRT exposure:1160 s (vignetting corrected)
Peak rate:0.027 (±0.006) ct s-1
Peak flux:1.15 (±0.24) ×10-12 erg cm-2 s-1
Mean rate:0.027 (±0.006) ct s-1
Mean flux:1.15 (±0.24) ×10-12 erg cm-2 s-1
Has spectral fit?Yes
NH 1.75 × 1021 cm-2
Γ 3.10
Database ID:376
Things to check:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: No warning (automatic)
Catalogue information
Known X-ray emitter?Yes - 4XMM J155740.2-793911 in the XMM-NEWTON/XMMSSC catalogue.
Cat. rate1:0.058 (±0.010) ct s-1
Cat. flux2:3.6 (±0.7) ×10-13 erg cm-2 s-1
Observed/Cat. flux1.9 σ
Fading? ≤3-σ signifance.
Near 2MASS source? Yes, 3 matches. Show details.
Near SIMBAD source?Yes - Gaia DR3 5778356748440163840 is 1.2″ away.
High proper motion star?Yes. Gaia DR3 5778356748440163840
Catalogue SearchCone search radius 12″ Vizier | Simbad | NED | X-ray master | LSXPS | 3XMM-DR5

Notes
All XRT count rates and fluxes are 0.3—10 keV
1Catalogued count-rates have been converted to XRT equivalents.
2Catalogued upper limits and fluxes have been converted to the XRT equivalent using the automatic power-law spectral fit described above.

2MASS objects near the source

ID Position Offset from
XRT source		 J H K