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GRB 250527C — Source 1 (SWIFT J211830.5+524736)

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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

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Source details
Rank/Classification: 4: Known X-ray Source
RA (J2000):21h 18m 30.79s (= 319.62830°)
Dec (J2000):+52° 47′ 39.1″ (= +52.7942°)
Error (radius, 90%):2.9″ (enhanced position)
Detection flag:Good
XRT exposure:4.8 ks (vignetting corrected)
Peak rate:0.043 (±0.009) ct s-1
Peak flux:1.8 (±0.4) ×10-12 erg cm-2 s-1
Mean rate:0.0157 (+0.0024, -0.0023) ct s-1
Mean flux:6.74 (+1.01, -0.98) ×10-13 erg cm-2 s-1
The source is fading with 2.0-σ significance
Has spectral fit?Yes
NH 1.32 × 1022 cm-2
Γ 6.49
Database ID:1414
Possible issues:
Optical Loading: No warning (automatic)
Stray Light: No warning (automatic)
Extended Emission: No warning (automatic)
Catalogue information
Known X-ray emitter?Yes - 1RXS J211831.5+524742 in the ROSAT/RASSFSC catalogue.
Cat. rate1:0.033 (±0.008) ct s-1
Cat. flux2:3.6 (±0.9) ×10-13 erg cm-2 s-1
Observed/Cat. flux2.2 σ
Fading? Maybe (2.0-σ significance).
Near 2MASS source? Yes, 2 matches. Show details.
Near SIMBAD source?Yes - TYC 3953-1190-2 is 3.9″ away.
High proper motion star?Yes. GSC 03953-01190
Catalogue SearchCone search radius 8″ 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