BEPPOSAX OBSERVATION OF 3C273 - BROAD-BAND SPECTRUM AND DETECTION OF A LOW-ENERGY ABSORPTION FEATURE

Authors
GRANDI P GUAINAZZI M MINEO T PARMAR AN FIORE F MATTEUZZI A NICASTRO F PEROLA GC PIRO L CAPPI M CUSUMANO G FRONTERA F GIARRUSSO S PALAZZI E PIRAINO S
Citation
P. Grandi et al., BEPPOSAX OBSERVATION OF 3C273 - BROAD-BAND SPECTRUM AND DETECTION OF A LOW-ENERGY ABSORPTION FEATURE, Astronomy and astrophysics, 325(2), 1997, pp. 17-20
Citations number
25
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
325
Issue
2
Year of publication
1997
Pages
17 - 20
Database
ISI
SICI code
0004-6361(1997)325:2<17:BOO3-B>2.0.ZU;2-K
Abstract
We report the results of a 3C273 observation performed during the Scie nce Verification Phase (SVP) of the BeppoSAX satellite. The broad-band spectrum is well represented by a power-law between similar to 1 keV and 200 keV. The spectral slope is flat (Gamma similar to 1.6), with a weak emission line at similar to 6.4 keV (rest frame) of EW similar t o 30 eV. Below 1 keV, a deviation from a power-law due to an absorptio n feature plus a soft component is present. This is the first time tha t a feature in absorption at similar to 0.5 keV (observer frame) is un ambiguously detected in 3C273.