Browsing by Subject "Galaxies: Photometry"

Now showing items 1-4 of 4

Intranight optical variability in optically selected QSOs

Gopal-Krishna; Sagar, R; Wiita, J. Paul (Blackwell Publishing, 1995-06)

We report results from a continuing programme to search for intranight optical variability in one radio-moderate and six radio-quiet (but all optically bright and luminous) quasi-stellar objects, using the 2.34-m Vainu ...
Multi-colour optical monitoring of the intra-day variable blazar S5 0716+71

Sagar, R; Gopal-Krishna; Mohan, V; Pandey, A. K; Bhatt, B. C; Wagner, S. J (The European Southern Observatory, 1999-02)

We report multi-colour optical monitoring of the intra-day variable blazar S5 0716+71 with a dense temporal coverage over a total duration of 4 weeks in February/March 1994. Four filters (BV Johnson and RI Cousins) were ...
Optical Variability of Blazars

Ghosh, K. K; Ramsey, B. D; Sadun, A. C; Soundararajaperumal, S (The American Astronomical Society, 2000-03)

In this paper we show the results of our monitoring the flux variability of 15 blazars, within the redshift range of 0.07-2.06, all with a visual magnitude range between 14 and 20 mag. Because blazars have displayed ...
Short-Term Optical Variability in Broad Absorption Line QSOs

Anupama, G. C; Chokshi, A (The American Astronomical Society, 1998-02)

We present the first results from a pilot program to monitor the short-term optical variability in broad absorption line system QSOs. Intranight optical variations of 5% were detected on timescales of 1 hr in QSOs 0846+156 ...

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