THE UNUSUAL SPECTRAL ENERGY DISTRIBUTION OF LBQS 0102-2713
- 16 June 2009
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 699 (1), 732-741
- https://doi.org/10.1088/0004-637x/699/1/732
Abstract
We have studied the SED of the quasar LBQS 0102-2713. The available multiwavelength data are one optical spectrum between 3200 and 7400 A, 7 HST FOS spectra between 1700 and 2300 A, one GALEX NUV flux density and a K_S magnitude obtained from NED, and 3 public ROSAT PSPC pointed observations in the 0.1$-$2.4 keV energy band. The alpha_ox values obtained are -2.3 and -2.2, respectively, comparable to BAL quasars. The ROSAT photon index is 6.0+-1.3. The 2500 A luminosity density is about a factor of 10 higher compared to the mean of the most luminous SDSS quasars. We argue that the object might be indicative for a new class of quasars with an unusual combination in their UV-, X-ray, and N_H properties.Keywords
This publication has 29 references indexed in Scilit:
- An ExploratoryChandraSurvey of a Well‐defined Sample of 35 Large Bright Quasar Survey Broad Absorption Line QuasarsThe Astrophysical Journal, 2006
- An explanation for the soft X-ray excess in active galactic nucleiMonthly Notices of the Royal Astronomical Society, 2005
- XMM-Newton spectral properties of the narrow-line Seyfert 1 galaxy IRAS 13224 - 3809Monthly Notices of the Royal Astronomical Society, 2003
- XMM-Newtondiscovery of a sharp spectral feature at ∼ 7 keV in the narrow-line Seyfert 1 galaxy 1H 0707−495Monthly Notices of the Royal Astronomical Society, 2002
- QSO 2359−1241: A Bright, Highly Polarized, Radio‐moderate, Reddened, Low‐Ionization Broad Absorption Line QuasarThe Astrophysical Journal, 2001
- X‐Ray Observations of Optically Selected, Radio‐quiet Quasars. I. TheASCAResultsThe Astrophysical Journal, 2000
- ASCA observations of two steep soft X-ray quasarsMonthly Notices of the Royal Astronomical Society, 1998
- A comparison of the hard ASCA spectral slopes of broad- and narrow-line Seyfert 1 galaxiesMonthly Notices of the Royal Astronomical Society, 1997
- Atlas of quasar energy distributionsThe Astrophysical Journal Supplement Series, 1994
- H I in the GalaxyAnnual Review of Astronomy and Astrophysics, 1990