SUMMARY OF PROPOSAL 62140
PENN STATE UNIV.
525 DAVEY LAB
UNIVERSITY PARK
PA USA 16802
Tel: 814-863-5787 Fax: 814-863-8686
Medium: 4GBDAT
Subject: AGN
X-RAY AND EUV ABSORPTION IN BL LACERTAE OBJECTS
ABSTRACT
There is mounting evidence from higher-sensitivity X-ray and EUV data that ionized gas is present in the inner regions of BL Lacs, with low column densities and ionization parameters. The EUV/X-ray absorber represents a new and exciting component of BL Lacs, opening up the central regions of these objects for detailed study. We propose simultaneous EUVE and ASCA spectroscopy of 3 bright BL Lacs where evidence for intrinsic X-ray absorption was found recently. The ASCA observations will allow us to: (1) determine tightly the continuum to study EUV absorption, (2) study absorption due to ionized oxygen, and (3) investigate correlated X-ray and EUV flux variability.
CO-INVESTIGATORS
| CO-I NAME | INSTITUTE | COUNTRY |
|---|
| C. MEGAN URRY | STSCI | USA |
| HERMAN MARSHALL | MIT | USA |
| ARIEH KONIGL | UNIV. OF CHICAGO | USA |
TARGETS
| TARGET NAME | PRI | RA | DEC | TIME | TC | OFF | GIS | SIS CNT | OBS |
|---|
| 1)MRK 501 | 2 | 253.4675 | 39.7602 | 60 ks | N | Y | P | 1.10000 | 1 |
| 2)H1426+428 | 2 | 217.1358 | 42.6724 | 40 ks | N | Y | P | 1.03000 | 1 |