SUMMARY OF PROPOSAL 62142
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 URRY | STSCI | USA |
| LAURA MARASCHI | OSS. DI BRERA | ITALY |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)0405-123 | 2 | 61.9500 | -12.1933 | 30 ks | N | Y | P | 0.22000 | 1 |
| 2)0736+017 | 3 | 114.8250 | 1.6179 | 40 ks | N | Y | P | 0.08000 | 1 |
| 3)0923+392 | 3 | 141.7625 | 39.0391 | 40 ks | N | Y | P | 0.10000 | 1 |
| 4)1150+497 | 3 | 178.3521 | 49.5191 | 40 ks | N | Y | P | 0.10000 | 1 |