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Einstein Probe trigger EP250321a
Source 11 (SWIFT J115739.8+171839)

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):11h 57m 39.82s (= 179.41591°)
Dec (J2000):+17° 18′ 39.9″ (= +17.3111°)
Error (radius, 90%):7.1″
Detection flag:Poor
XRT exposure:10.3 ks (vignetting corrected)
Peak rate:1.5 (+0.9, -0.7) ×10-3 ct s-1
Peak flux:6.6 (+3.8, -2.8) ×10-14 erg cm-2 s-1
Mean rate:1.5 (+0.9, -0.7) ×10-3 ct s-1
Mean flux:6.6 (+3.8, -2.8) ×10-14 erg cm-2 s-1
Has spectral fit?Yes
NH 4.01 × 1020 cm-2
Γ 8.69
Database ID:345
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 limit3.9×10-3 ct s-1
Obs rate/LSXPS UL≤0 σ
Rass upper limit24.0×10-4 ct s-1
Obs rate/Rass UL1.5 σ
Fading? ≤3-σ signifance.
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 21″ 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.