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Einstein Probe trigger EP251124a
Source 1 (SWIFT J025426.8+413450)

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):02h 54m 27.08s (= 43.61282°)
Dec (J2000):+41° 34′ 51.3″ (= +41.5809°)
Error (radius, 90%):2.5″ (enhanced position)
Detection flag:Good
XRT exposure:2.5 ks (vignetting corrected)
Peak rate:0.94 (±0.25) ct s-1
Peak flux:4.0 (±1.1) ×10-11 erg cm-2 s-1
Mean rate:0.53 (±0.04) ct s-1
Mean flux:2.27 (±0.16) ×10-11 erg cm-2 s-1
Has spectral fit?Yes
NH 3.68 × 1021 cm-2
Γ 2.25
Database ID:502
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 - LSXPS J025426.9+413450
Cat. rate1:0.044 (±0.011) ct s-1
Cat. flux2:1.5 (±0.3) ×10-12 erg cm-2 s-1
Observed/Cat. flux3.5 σ
Fading? ≤3-σ signifance.
Near 2MASS source? Yes, 1 match. Show details.
Near SIMBAD source?Yes - NGC 1129 is 7.4″ away.
High proper motion star?No.
Catalogue SearchCone search radius 7″ 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