ar X iv : a st ro - p h / 97 12 09 3 v 2 2 0 M ay 1 99 8 ORFEUS - SPAS II EUV Spectroscopy of ǫ CMa

ORFEUS-SPAS II EUV Spectroscopy of ǫ CMa (B2 II) 1

We report on EUV spectroscopic observations of the B bright giant ǫ CMa made during the ORFEUS-SPAS II mission. We assess the performance of the instrument in the EUV and find that the effective area is roughly three times that of the EUVE long wavelength spectrometer and that the spectral resolution is λ/∆λ ≈ 1250. We identify most of the features, qualitatively compare different models, and e...

ar X iv : a st ro - p h / 98 04 16 1 v 1 1 6 A pr 1 99 8 Far Ultraviolet Performance of the Berkeley Spectrograph During the ORFEUS - SPAS II Mission

The Berkeley spectrograph aboard the ORFEUS telescope made its second flight on the 14-day ORFEUS-SPAS II mission of the Space Shuttle Columbia in November/December 1996. Approximately half of the available observing time was dedicated to the Berkeley spectrograph, which was used by both Principal and Guest Investigators. The spectrograph’s full bandpass is 390–1218 Å; here we discuss its in-fl...

ar X iv : a st ro - p h / 97 11 24 4 v 1 2 0 N ov 1 99 7 POPULATION SYNTHESIS OF HIGH ENERGY TRANSIENTS RELATIVISTIC BINARY MERGING RATES

ar X iv : a st ro - p h / 99 05 37 6 v 1 2 8 M ay 1 99 9 A 6 . 4 - hr positive superhump period in TV

ar X iv : a st ro - p h / 97 05 05 3 v 1 8 M ay 1 99 7 Spectropolarimetry of FIRST 0840 + 3633

We present Keck spectropolarimetry of a rare “Iron LoBALQSO,” FIRST 0840+3633. The continuum is ∼4% polarized near 2000Å rest-frame, but falls to ∼2% at longer wavelengths, and maintains a relatively constant position angle of 50. The emission lines are unpolarized. The polarization increases up to ∼8% in the low-ionization absorption troughs of Mg II λ2800 and Al III λ1860. The polarization an...