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10 papers · 2 filters
WR 143: A Wolf-Rayet Binary
Watson P. Varricatt, Nagarhalli M. Ashok
Near infrared spectroscopy and photometry of the Wolf-Rayet Star WR 143 (HD 195177) were obtained in the photometric bands. High resolution spectra observed in the J and H ba…
Combining visibilities from the Giant Meterwave Radio Telescope and the Nancay Radio Heliograph: High dynamic range snapshot images of the solar corona at 327 MHz
Claude Mercier, Prasad Subramanian, Alain Kerdraon +3
We report first results from an ongoing program of combining visibilities from the Giant Meterwave Radio Telescope (GMRT) and the Nancay Radio Heliograph (NRH) to produce composite…
Optical and Near-Infrared spectroscopy of Nova V1494 Aquilae 1999 #2
U. S. Kamath, G. C. Anupama, N. M. Ashok +2
Optical and near-infrared spectroscopic observations of the fast nova V1494 Aquilae 1999 #2 covering various phases -- early decline, transition and nebular -- during the first eig…
Near-Infrared water lines in V838 Monocerotis
D. P. K. Banerjee, R. J. Barber, N. M. Ashok +1
V838 Monocerotis had an intriguing, nova-like outburst in January 2002 which has subsequently led to several studies of the object. It is now recognized that the outburst of V838 M…
Multiwavelength Observations of 3C 66A during the WEBT campaign of 2003 - 2004
M. Boettcher, J. Harvey, M. Joshi
The BL Lac object 3C 66A was the target of an extensive multiwavelength monitoring campaign from July 2003 through April 2004, involving observations throughout the electromagnetic…
Intra-night Optical Variability of Luminous Radio Quiet QSOs
A. C. Gupta, U. C. Joshi
In the present paper we report the detection of intra-night variability in some of the RQQSOs and one LDQ. To study intra-night variability, we carried out photometric monitoring o…