GRB 250331D — Source 4 (SWIFT J031504.9+622224)

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Image | Exposure map

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

Spectrum

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Source 2 has been manually confirmed as the GRB afterglow so these products are no longer updated.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:	3: Uncatalogued X-ray source
RA (J2000):	03h 15m 04.93s (= 48.77053°)
Dec (J2000):	+62° 22′ 24.1″ (= +62.3734°)
Error (radius, 90%):	5.9″
Detection flag:	Poor
XRT exposure:	8.6 ks (vignetting corrected)
Peak rate:	1.8 (+0.9, -0.7) ×10^-3 ct s^-1
Peak flux:	8 (+4, -3) ×10^-14 erg cm^-2 s^-1
Mean rate:	1.8 (+0.9, -0.7) ×10^-3 ct s^-1
Mean flux:	8 (+4, -3) ×10^-14 erg cm^-2 s^-1
Has spectral fit?	Yes
NH	4.54 × 10²³ cm^-2
Γ	-2.10
Database ID:	1388
Possible issues:
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 limit²	35176 ct s^-1
Obs rate/Rass UL	≤0 σ
Fading?	No (≤1-σ significance).
Near 2MASS source?	Yes, 1 match. Show details.
Near SIMBAD source?	No.
High proper motion star?	No.
Catalogue Search	Cone search radius 17″ 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

Coordinate style:

ID	Position	Offset from XRT source	J	H	K