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Einstein Probe trigger EP250821a
Source 6 (SWIFT J191933.8-432327)

Image of the XRT detection

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

Image of the LC

Spectrum

Image of the spectrum
Source details
Rank/Classification: 3: Uncatalogued X-ray source
RA (J2000):19h 19m 33.86s (= 289.89107°)
Dec (J2000):-43° 23′ 27.7″ (= -43.3910°)
Error (radius, 90%):6.2″
Detection flag:Poor
XRT exposure:17.3 ks (vignetting corrected)
Peak rate:0.048 (±0.013) ct s-1
Peak flux:2.1 (±0.5) ×10-12 erg cm-2 s-1
Mean rate:0.0131 (±0.0020) ct s-1
Mean flux:5.6 (±0.8) ×10-13 erg cm-2 s-1
The source is fading with 3.8-σ significance
Has spectral fit?Yes
NH 9.96 × 1021 cm-2
Γ 2.87
Database ID:436
Things to check:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: Needs checking (automatic)
Catalogue information
Known X-ray emitter?No. Get XMM upper limit
Rass upper limit20.069 ct s-1
Obs rate/Rass UL≤0 σ
Fading? Yes (3.8-σ difference between at least one detection and a later detection or upper limit).
Near 2MASS source? No
Near SIMBAD source?Yes - Gaia DR3 6712811885380654336 is 13.6″ away.
High proper motion star?No.
Catalogue SearchCone search radius 18″ 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.