GRB 210218A — Source 1 (SWIFT J030846.1+352738)

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Image | Exposure map

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

Spectrum

Enhanced position

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Source 3 has been manually confirmed as the GRB afterglow so these products are no longer updated.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 08m 45.77s (= 47.19071°)
Dec (J2000):	+35° 27′ 40.5″ (= +35.4612°)
Error (radius, 90%):	3.9″ (enhanced position)
Detection flag:	Good
XRT exposure:	6.6 ks (vignetting corrected)
Peak rate:	0.013 (+0.007, -0.005) ct s^-1
Peak flux:	5.7 (+3.0, -2.2) ×10^-13 erg cm^-2 s^-1
Mean rate:	8.7 (+1.7, -1.5) ×10^-3 ct s^-1
Mean flux:	3.8 (+0.7, -0.6) ×10^-13 erg cm^-2 s^-1
Has spectral fit?	Yes
NH	1.66 × 10²² cm^-2
Γ	1.16
Database ID:	528
Possible issues:
Optical Loading:	Needs checking (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	0.024 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?	Yes - TYC 2347-941-1 is 4.6″ away.
Catalogue Search	Cone search radius 11″ 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