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Einstein Probe trigger EP241217a
Source 2 (SWIFT J030805.8+304931)

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):03h 08m 05.72s (= 47.02382°)
Dec (J2000):+30° 49′ 33.4″ (= +30.8259°)
Error (radius, 90%):3.1″ (enhanced position)
Detection flag:Good
XRT exposure:5.4 ks (vignetting corrected)
Peak rate:0.030 (±0.007) ct s-1
Peak flux:1.28 (±0.28) ×10-12 erg cm-2 s-1
Mean rate:0.024 (±0.003) ct s-1
Mean flux:1.02 (±0.14) ×10-12 erg cm-2 s-1
The source is fading with 1.4-σ significance
Has spectral fit?Yes
NH 2.01 × 1021 cm-2
Γ 1.66
Database ID:245
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 - 1RXS J030805.2+304943 in the ROSAT/RASSFSC catalogue.
Cat. rate1:0.024 (±0.008) ct s-1
Cat. flux2:1.1 (±0.4) ×10-12 erg cm-2 s-1
Observed/Cat. flux≤0 σ
Fading? ≤3-σ signifance.
Near 2MASS source? Yes, 1 match. Show details.
Near SIMBAD source?Yes - 2MASS J03080580+3049327 is 1.1″ away.
High proper motion star?No.
Catalogue SearchCone search radius 9″ 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