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Einstein Probe trigger EP250831a
Source 1 (SWIFT J025130.9-360728)

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: 3: Uncatalogued X-ray source
RA (J2000):02h 51m 31.14s (= 42.87977°)
Dec (J2000):-36° 07′ 28.0″ (= -36.1244°)
Error (radius, 90%):4.4″ (enhanced position)
Detection flag:Good
XRT exposure:5.1 ks (vignetting corrected)
Peak rate:7.6 (+2.8, -2.3) ×10-3 ct s-1
Peak flux:3.28 (+1.22, -0.98) ×10-13 erg cm-2 s-1
Mean rate:4.7 (+1.4, -1.1) ×10-3 ct s-1
Mean flux:2.0 (+0.6, -0.5) ×10-13 erg cm-2 s-1
The source is fading with 1.7-σ significance
Has spectral fit?Yes
NH 3.05 × 1020 cm-2
Γ 2.29
Database ID:459
Things to check:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: No warning (automatic)
Catalogue information
Known X-ray emitter?No. Get XMM upper limit
LSXPS upper limit0.017 ct s-1
Obs rate/LSXPS UL≤0 σ
Rass upper limit20.021 ct s-1
Obs rate/Rass UL≤0 σ
Fading? ≤3-σ signifance.
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 13″ 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.