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SVOM trigger GRB 250831A
Source 4 (SWIFT J013908.4-175622)

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):01h 39m 08.47s (= 24.78529°)
Dec (J2000):-17° 56′ 22.4″ (= -17.9395°)
Error (radius, 90%):5.6″
Detection flag:Poor
XRT exposure:1559 s (vignetting corrected)
Peak rate:0.98 (±0.21) ct s-1
Peak flux:4.2 (±0.9) ×10-11 erg cm-2 s-1
Mean rate:0.558 (±0.027) ct s-1
Mean flux:2.40 (+0.12, -0.11) ×10-11 erg cm-2 s-1
The source is fading with 1.4-σ significance
Has spectral fit?Yes
NH 1.17 × 1021 cm-2
Γ 2.18
Database ID:391
Things to check:
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 limit1.5×10-3 ct s-1
Obs rate/LSXPS UL4.7 σ
Rass upper limit20.13 ct s-1
Obs rate/Rass UL4.1 σ
Fading? ≤3-σ signifance.
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 16″ 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.