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Properties of the Scorpii Circumstellar Disk from Continuum Modeling
A. C. Carciofi, A. S. Miroshnichenko, A. V. Kusakin +8
We present optical and infrared photometric observations of the Be binary system Sco, obtained in 2000--2005, mid-infrared (10 and m) photometry and optical…
Evolution of the Inner Circumstellar Envelope of V838 Monocerotis
John P. Wisniewski, Karen S. Bjorkman, Antonio M. Magalhaes
We present imaging polarimetry observations of the eruptive variable V838 Monocerotis and its neighboring field obtained in 2002 October. The polarization of field stars confirms t…
Blobs in Wolf-Rayet Winds: Random Photometric and Polarimetric Variability
Claudia V. Rodrigues, A. Mario Magalhaes
Some isolated Wolf-Rayet stars present random variability in their optical flux and polarization. We make the assumption that such variability is caused by the presence of regions…
Spectropolarimetry of the Luminous Narrow-Line Seyfert Galaxies IRAS 20181-2244 and IRAS 13224-3809
Laura E. Kay, A. M. Magalhaes, F. Elizalde +1
We observed the narrow-line Seyfert 1 galaxies IRAS 20181-2244 and IRAS 13324-3809 with a new spectropolarimeter on the RC spectrograph at the CTIO 4m telescope. Previously it had…
Multiwavelength Monitoring of the BL Lacertae Object PKS 2155-304 in May 1994. I. The Ground-Based Campaign
J. E. Pesce, C. M. Urry, L. Maraschi +29
Optical, near-infrared, and radio observations of the BL Lac object PKS2155-304 were obtained simultaneously with a continuous UV/EUV/X-ray monitoring campaign in 1994 May. Further…