Browsing IIAP Publications by Author "Jeyakumar, S"

Now showing items 1-3 of 3

Long-term optical flux and colour variability in quasars

Sukanya, N; Stalin, C. S; Jeyakumar, S; Praveen, D; Dhani, A; Damle, R (IOP Publishing, 2016-02)

We have used optical V and R band observations from the Massive Compact Halo Object (MACHO) project on a sample of 59 quasars behind the Magellan ic clouds to study their long term optical flux and colour ...
Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping

Stalin, C. S; Jeyakumar, S; Coziol, R; Pawase, R. S; Thakur, S. S (Wiley-Blackwell, 2011-09)

We present the results of our optical monitoring campaign of the X-ray source H 0507+164, a low-luminosity Seyfert 1.5 galaxy at a redshift z= 0.018. Spectroscopic observations were carried out during 22 nights in 2007, ...
Reverberation mapping of the Seyfert 1.5 galaxy H 0507+164

Jeyakumar, S; Stalin, C. S; Coziol, R (Instituto de Astronomia, UNAM, 2011-10)

Light curves of the continuum at 5100 °A and Hβ line are obtained from spectroscopic monitoring observations of the Seyfert 1.5 galaxy H 0507+164. The mass of the black hole is calculated based on cross-correlation ...

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