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SVOM trigger GRB 250818B
Source 1 (SWIFT J030413.2-030730)

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: 1: Transient source
RA (J2000):03h 04m 13.24s (= 46.05517°)
Dec (J2000):-03° 07′ 30.2″ (= -3.1251°)
Error (radius, 90%):3.6″
Detection flag:Good
XRT exposure:604 s (vignetting corrected)
Peak rate:1.14 (±0.25) ct s-1
Peak flux:4.9 (±1.1) ×10-11 erg cm-2 s-1
Mean rate:0.71 (±0.05) ct s-1
Mean flux:3.05 (±0.22) ×10-11 erg cm-2 s-1
Has spectral fit?Yes
NH 8.59 × 1020 cm-2
Γ 1.67
Database ID:387
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
Rass upper limit20.14 ct s-1
Obs rate/Rass UL4.0 σ
Fading? ≤3-σ signifance.
Near 2MASS source? No
Near SIMBAD source?No.
High proper motion star?No.
Catalogue SearchCone search radius 10″ 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.