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SVOM trigger GRB 250831A
Source 2 (SWIFT J013909.3-175732)

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 09.31s (= 24.78880°)
Dec (J2000):-17° 57′ 32.3″ (= -17.9590°)
Error (radius, 90%):5.4″
Detection flag:Poor
XRT exposure:1559 s (vignetting corrected)
Peak rate:6.6 (±1.4) ct s-1
Peak flux:2.8 (±0.6) ×10-10 erg cm-2 s-1
Mean rate:4.69 (±0.19) ct s-1
Mean flux:2.01 (±0.08) ×10-10 erg cm-2 s-1
The source is fading with 4.1-σ significance
Has spectral fit?Yes
NH 1.01 × 1021 cm-2
Γ 2.49
Database ID:389
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 limit5.7×10-4 ct s-1
Obs rate/LSXPS UL4.7 σ
Rass upper limit20.20 ct s-1
Obs rate/Rass UL4.5 σ
Fading? Yes (4.1-σ difference between at least one detection and a later detection or upper limit).
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.