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GRB 250331D — Source 1 (SWIFT J031302.5+621827)

Build custom XRT products for this source.

Image of the XRT detection

This source is detected in 1 block. Show all images.

Image of the LC

Spectrum

Image of the spectrum

Enhanced position

Image of the UVOT image

Back to list of objects in this field.

Source 2 has been manually confirmed as the GRB afterglow so these products are no longer updated. The up-to-date data for the afterglow are now available through the main GRB results area for this GRB.

Source details
Rank/Classification: 4: Known X-ray Source
RA (J2000):03h 13m 02.36s (= 48.25985°)
Dec (J2000):+62° 18′ 26.9″ (= +62.3075°)
Error (radius, 90%):4.1″ (enhanced position)
Detection flag:Good
XRT exposure:8.6 ks (vignetting corrected)
Peak rate:7.3 (±1.9) ×10-3 ct s-1
Peak flux:3.1 (±0.8) ×10-13 erg cm-2 s-1
Mean rate:6.2 (±1.1) ×10-3 ct s-1
Mean flux:2.7 (±0.5) ×10-13 erg cm-2 s-1
Has spectral fit?Yes
NH 8.22 × 1021 cm-2
Γ 4.41
Database ID:1385
Possible issues:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: No warning (automatic)
Catalogue information
Known X-ray emitter?Yes - LSXPS J031302.1+621824
Cat. rate1:3.2 (±0.4) ×10-3 ct s-1
Cat. flux2:6.5 (±0.8) ×10-14 erg cm-2 s-1
Observed/Cat. flux2.2 σ
Fading? No (≤1-σ significance).
Near 2MASS source? Yes, 1 match. Show details.
Near SIMBAD source?Yes - ZTF J031302.33+621827.1 is 1.8″ away.
High proper motion star?No.
Catalogue SearchCone search radius 12″ 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.

2MASS objects near the source

ID Position Offset from
XRT source		 J H K