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GRB 220218A — Source 4 (SWIFT J085515.6+315844)

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Image of the XRT detection

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Spectrum

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Source details
Rank/Classification: 3: Uncatalogued X-ray source
RA (J2000):08h 55m 15.63s (= 133.81514°)
Dec (J2000):+31° 58′ 44.3″ (= +31.9790°)
Error (radius, 90%):6.3″
Detection flag:Good
XRT exposure:12.7 ks (vignetting corrected)
Peak rate:2.79 (+1.24, -0.98) ×10-3 ct s-1
Peak flux:1.2 (+0.5, -0.4) ×10-13 erg cm-2 s-1
Mean rate:1.5 (+0.5, -0.4) ×10-3 ct s-1
Mean flux:6.3 (+2.2, -1.7) ×10-14 erg cm-2 s-1
The source is fading with 1.7-σ significance
Has spectral fit?Yes
NH 1.02 × 1022 cm-2
Γ 1.90
Database ID:756
Possible issues:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: OK (verified)
Catalogue information
Known X-ray emitter?No. Get XMM upper limit
Rass upper limit20.083 ct s-1
Obs rate/Rass UL≤0 σ
Fading? Maybe (1.7-σ significance).
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 18″ 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.