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Einstein Probe trigger EP250304a
Source 1 (SWIFT J135334.5-424816)

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: 2: Outbursting source
RA (J2000):13h 53m 34.58s (= 208.39408°)
Dec (J2000):-42° 48′ 16.7″ (= -42.8046°)
Error (radius, 90%):4.1″
Detection flag:Good
XRT exposure:28.0 ks (vignetting corrected)
Peak rate:0.21 (±0.05) ct s-1
Peak flux:9.1 (±2.0) ×10-12 erg cm-2 s-1
Mean rate:0.0101 (±0.0008) ct s-1
Mean flux:4.3 (±0.3) ×10-13 erg cm-2 s-1
The source is fading with 4.4-σ significance
Has spectral fit?Yes
NH 7.56 × 1020 cm-2
Γ 1.73
Database ID:315
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 J135334.6-424816
Cat. rate1:0.0144 (±0.0012) ct s-1
Cat. flux2:5.5 (±0.5) ×10-13 erg cm-2 s-1
Observed/Cat. flux4.1 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 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.