2003A&A...400..477T


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST21:46:01

2003A&A...400..477T - Astronomy and Astrophysics, volume 400, 477-486 (2003/3-3)

The BL Lacertae objects OQ 530 and S5 0716+714. Simultaneous observations in the X-rays, radio, optical and TeV bands.

TAGLIAFERRI G., RAVASIO M., GHISELLINI G., GIOMMI P., MASSARO E., NESCI R., TOSTI G., ALLER M.F., ALLER H.D., CELOTTI A., MARASCHI L., TAVECCHIO F. and WOLTER A.

Abstract (from CDS):

We present the results of the BeppoSAX observations of two BL Lacs, OQ 530 and S5 0716+714, as part of a ToO program for the simultaneous observation at radio, optical, X-ray and TeV energies. Both sources are detected in the LECS and MECS, with S5 0716+714 visible also in the PDS band, up to about ∼60keV. The X-ray spectra of both sources are better fitted by a double power-law model, with a steep soft X-ray component flattening at harder energies, with breaks at 0.3 and 1.5keV, respectively. The concave shape of the spectra in both objects is consistent with soft X-rays being produced by the synchrotron and harder X-rays by the inverse Compton processes. Also the X-ray variability properties confirm this scenario; in particular, for S5 0716+714 our observation shows variations by about a factor of 3 over one hour below ∼3keV and no variability above. Their simultaneous broad-band energy spectral distributions can be successfully interpreted within the frame of a homogeneous synchrotron and inverse Compton model, including a possible contribution from an external source of seed photons with the different spectral states of S5 0716+714 being reproduced by changing the injected power. The resulting parameters are fully consistent with the two sources being intermediate objects within the ``sequence" scenario proposed for blazars.

Abstract Copyright:

Journal keyword(s): BL Lacertae objects: general - X-rays: galaxies - BL Lacertae objects: individual: OQ 530, S5 0716+714

Simbad objects: 5

goto Full paper

goto View the reference in ADS

Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1131 1
2 7C 1219+2830 BLL 12 21 31.6902446545 +28 13 58.500383827   16.81 16.11 14.24   ~ 778 1
3 6C 141804+543700 BLL 14 19 46.5976435439 +54 23 14.787308481   16.17 15.65 14.16   ~ 537 1
4 QSO B2005-489 BLL 20 09 25.3910622923 -48 49 53.722146927   15.75 12.81 11.41   ~ 510 2
5 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 2006 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2003A&A...400..477T and select 'bookmark this link' or equivalent in the popup menu


2020.07.04-21:46:01

© Université de Strasbourg/CNRS

    • Contact