SUMMARY OF PROPOSAL 62140
PENN STATE UNIV.
525 DAVEY LAB
PA USA 16802
Tel: 814-863-5787 Fax: 814-863-8686
X-RAY AND EUV ABSORPTION IN BL LACERTAE OBJECTS
ABSTRACTThere 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-I NAME ||INSTITUTE ||COUNTRY |
|C. MEGAN URRY||STSCI||USA|
| HERMAN MARSHALL||MIT||USA|
| ARIEH KONIGL||UNIV. OF CHICAGO||USA|
|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|