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Einstein Probe trigger EP250321a
Source 4 (SWIFT J115633.1+171324)

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):11h 56m 33.06s (= 179.13774°)
Dec (J2000):+17° 13′ 30.0″ (= +17.2250°)
Error (radius, 90%):3.1″ (enhanced position)
Detection flag:Poor
XRT exposure:8.3 ks (vignetting corrected)
Peak rate:0.030 (±0.006) ct s-1
Peak flux:1.28 (±0.27) ×10-12 erg cm-2 s-1
Mean rate:0.0218 (±0.0022) ct s-1
Mean flux:9.4 (±0.9) ×10-13 erg cm-2 s-1
Has spectral fit?Yes
NH 4.07 × 1020 cm-2
Γ 1.81
Database ID:338
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 limit0.014 ct s-1
Obs rate/LSXPS UL2.5 σ
Rass upper limit20.035 ct s-1
Obs rate/Rass UL≤0 σ
Fading? ≤3-σ signifance.
Near 2MASS source? No
Near SIMBAD source?Yes - NVSS J115633+171331 is 4.8″ 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.