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Einstein Probe trigger EP250821a
Source 1 (SWIFT J191932.6-432250)

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: 1: Transient source
RA (J2000):19h 19m 32.66s (= 289.88608°)
Dec (J2000):-43° 22′ 53.2″ (= -43.3814°)
Error (radius, 90%):5.0″ (enhanced position)
Detection flag:Good
XRT exposure:17.3 ks (vignetting corrected)
Peak rate:0.52 (±0.12) ct s-1
Peak flux:2.2 (±0.5) ×10-11 erg cm-2 s-1
Mean rate:0.0485 (±0.0027) ct s-1
Mean flux:2.09 (±0.12) ×10-12 erg cm-2 s-1
The source is fading with 4.4-σ significance
Has spectral fit?Yes
NH 1.42 × 1021 cm-2
Γ 1.97
Database ID:431
Things to check:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: OK (verified)
Catalogue information
Known X-ray emitter?No. Get XMM upper limit
Rass upper limit20.065 ct s-1
Obs rate/Rass UL4.0 σ
Fading? Yes (4.4-σ difference between at least one detection and a later detection or upper limit).
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 15″ 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.