SUMMARY OF PROPOSAL 62142

DR. RITA M. SAMBRUNA
RMS@LATTE.ASTRO.PSU.EDU

PENN STATE UNIV.
525 DAVEY LAB
UNIVERSITY PARK
PA USA 16802
Tel: 814-863-5787 Fax: 814-863-8686
Medium: 4GBDAT
Subject: AGN

ASCA OBSERVATIONS OF A NEW BLAZAR CLASS


ABSTRACT

The different spectral properties of blazar subclasses provide important clues about the nature of these objects. The steep X-ray spectra of High-energy peaked BL Lacs, together with their flat values of the radio-to-X-ray indices, alpha-rx, indicate that these objects are synchrotron-dominated, while inverse Compton emission plays a more important role in Low-energy peaked BL Lacs and FSRQs as indicated by their flat X-ray continua and steep alpha-rx indices. We have found a new FSRQ subclass with unexpectedly steep ROSAT spectra (photon index > 2) and alpha-rx intermediate between HBLs and LBLs. We propose to observe with ASCA the 7 brightest steep X-ray FSRQs to determine the shape of their high-energy continua for the first time and clarify their role in the blazar family.

CO-INVESTIGATORS
CO-I NAME INSTITUTE COUNTRY
C.MEGAN URRYSTSCIUSA
LAURA MARASCHIOSS. DI BRERAITALY

TARGETS

TARGET NAMEPRIRADECTIMETCOFFGISSIS CNTOBS
1)0405-123
2
61.9500-12.1933 30 ksN
Y
P
0.22000
1
2)0736+017
3
114.8250 1.6179 40 ksN
Y
P
0.08000
1
3)0923+392
3
141.7625 39.0391 40 ksN
Y
P
0.10000
1
4)1150+497
3
178.3521 49.5191 40 ksN
Y
P
0.10000
1