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GRB 250311A — Source 1 (SWIFT J145747.4-024709)

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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):14h 57m 47.43s (= 224.44763°)
Dec (J2000):-02° 47′ 09.2″ (= -2.7859°)
Error (radius, 90%):9.8″
Detection flag:Poor
XRT exposure:681 s (vignetting corrected)
Peak rate:10 (+6, -4) ×10-3 ct s-1
Peak flux:4.2 (+2.7, -1.9) ×10-13 erg cm-2 s-1
Mean rate:10 (+6, -4) ×10-3 ct s-1
Mean flux:4.2 (+2.7, -1.9) ×10-13 erg cm-2 s-1
Has spectral fit?No
Database ID:1367
Possible issues:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: Needs checking (automatic)
Catalogue information
Known X-ray emitter?No. Get XMM upper limit
LSXPS upper limit0.045 ct s-1
Obs rate/LSXPS UL≤0 σ
Rass upper limit20.029 ct s-1
Obs rate/Rass UL≤0 σ
Fading? No (≤1-σ significance).
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 29″ 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 assuming a generic AGN spectrum:NH=3×1020 cm-2, Γ=1.7