UPPER LIMITS FOR THE X-RAY-EMISSION OF PC-0953+4749

Authors
MOLTHAGEN K WENDKER HJ BRIEL UG
Citation
K. Molthagen et al., UPPER LIMITS FOR THE X-RAY-EMISSION OF PC-0953+4749, Astronomy and astrophysics, 295(1), 1995, pp. 43-46
Citations number
20
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Astronomy and astrophysics → ACNP
ISSN journal
00046361
Volume
295
Issue
1
Year of publication
1995
Pages
43 - 46
Database
ISI
SICI code
0004-6361(1995)295:1<43:ULFTXO>2.0.ZU;2-G
Abstract
An upper limit for the X-ray emission of the z=4.5 quasar PC 0953+4749 from ROSAT observations is reported. The observed upper limit is cons istent with the optical magnitude and with the assumption of a normal value of alpha(ox).