2002A&A...396..787F

Query : 2002A&A...396..787F

2002A&A...396..787F - Astronomy and Astrophysics, volume 396787-792 (2002/12-4)

BL Lac identification for the ultraluminous X-ray source observed in the direction of NGC 4698.

FOSCHINI L., HO L.C., MASETTI N., CAPPI M., DADINA M., BASSANI L., MALAGUTI G., PALAZZI E., DI COCCO G., MARTINI P., RAVINDRANATH S., STEPHEN J.B., TRIFOGLIO M. and GIANOTTI F.

Abstract (from CDS):

We report the identification of the optical and radio counterparts of the ultraluminous X-ray (ULX) source XMMU J124825.9+083020 (NGC 4698-ULX1). The optical spectrum taken with the VLT yields a redshift of z=0.43, which implies that the ULX is not associated with the nearby galaxy NGC 4698. The spectral energy distribution calculated from the available data indicates that the source is likely to be a BL Lac object. The possible synchrotron peak at X-ray energies suggests that this source may be a γ-ray emitter.

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Journal keyword(s): galaxies: active - galaxies: Seyfert - galaxies: BL Lacertae objects: general

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 PKS J0550-3216 BLL 05 50 40.5705144672 -32 16 16.484718648   16.07 15.5     ~ 424 1
2 NGC 4698 Sy2 12 48 22.9082830584 +08 29 14.667552276   13.24 12.27     ~ 507 0
3 WISE J124825.85+083020.4 BLL 12 48 25.8540 +08 30 20.493     19.60 19.2   ~ 18 0
4 2MASS J12482844+0831127 Sy1 12 48 28.4548402968 +08 31 12.774929232   19.56 18.91     ~ 23 0

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