SUMMARY OF PROPOSAL 62142
PENN STATE UNIV.
525 DAVEY LAB
PA USA 16802
Tel: 814-863-5787 Fax: 814-863-8686
ASCA OBSERVATIONS OF A NEW BLAZAR CLASS
ABSTRACTThe 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-I NAME ||INSTITUTE ||COUNTRY |
| LAURA MARASCHI||OSS. DI BRERA||ITALY|
|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|