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Browsing by Author "Kasturirangan, K"

Browsing by Author "Kasturirangan, K"

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  • Flares on AM Canum Venaticorum 
    Marar, T. M. K; Padmini, V. N; Seetha, S; Narayanan Kutty, K. R; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (European Southern Observatory, 1988-01)
    AM CVn, an interacting binary system consisting of two helium white dwarfs, has been classified as a nova-like object. Normally it exhibits only small amplitude modulations of 0.05 mag with a 1051 s periodicity. The authors ...
  • Further photometric observations of the cataclysmic variable PG 1012-029 
    Ashoka, B. N; Marar, T. M. K; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Kluwer Academic Publishers, 1993)
    We report time series photometric observations of PG 1012-029, conducted during 1990 and 1991. Light curves of three consecutive eclipses recorded in a single night are presented. The enhanced pre-eclipse hump in our data ...
  • The Gamma Ray Burst experiment on the Indian SROSS C-2 satellite 
    Sinha, S; Sreekumar, P; Kasturirangan, K (Astronomical Society of India, 2001)
    The SROSS C-2 satellite launched by the ASLV carried aloft a CsI gamma ray burst detector. To date, 51 GRB events have been detected unambiguously with 22 being common with BATSE. The experiment with its 2 ms time resolution, ...
  • High speed photometry of dwarf nova EX Hydrae 
    Sharma, D. P; Marar, T. M. K; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (INSDOC, 1983-08)
    High speed optical photometric observations of the hard X-ray source EX Hya, carried out with the reflector of the Kevalur Observatory, are presented. The observations with time resolutions of 1 s or 2 s were made on four ...
  • High speed photometry of PG 1012-029 
    Ashoka, B. N; Seetha, S; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (European Southern Observatory, 1994-03)
    High speed optical photometric observations of PG 1012 - 029, conducted during 1990-1991, confirm the nova-like classification of the object. Several eclipses observed by us have been used to refine the orbital period of ...
  • High Speed Photometry of SS Cygni after an Outburst 
    Seetha, S; Padmini, V. N; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Konkoly Observatory, 1985-12)
  • High speed photometry of SS cygni after an outburst 
    Seetha, S; Padmini, V. N; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (Konkoly Observatory, 1985-12-20)
  • The Intermediate Polar PQ GEM -- Status of Wet Observations of 1996 
    Marar, T. M. K; Seetha, S; Ashoka, B. N; Kasturirangan, K; Mahra, H. S; Bhattacharyya, J. C; Leibowitz, E. M; Hemar, S; Mendelson, H; Ibbetson, P. A; O'Donoghue, D; Buckley, D. A. H; Breger, M; Handler, G; Sperl, M; Serkowitsch, E; Moskalik, P; Zola, S; Pajdosz, G; Krzesinski, J; Silvotti, R; Vauclair, G; Dolez, N; Solheim, J. E; Pfeiffer, B; Kepler, S. O; Kanaan, A; Provencal, J; Kawaler, S. D; O'Brien, M. S; Nather, R. E; Winget, D. E; Kleinman, S; Nitta, A; Bradley, P. A; Guzik, J. A; Clemens, C; Sullivan, D. J; Jiang, X (Baltic Astronomy, 1998-03)
    A summary of the results on PQ Gem based on WET observations conducted in February 1996 is presented. The 13.9 min spin period of the white dwarf in the system and the orbital side-band at 14.5 min have been detected ...
  • Periodic modulations in the optical light curves of EX Hydrae 
    Seetha, S; Sharma, D. P; Padmini, V. N; Marar, T. M. K; Kasturirangan, K (Kluwer Academic Publishers, 1987-02)
    The authors present here new results on the periodic modulations in the optical light curves of EX Hydrae observed during 1982 - 84. The period analysis has been done using synchronous summation and discrete Fourier transform ...
  • Photometric observations of cataclysmic variables from UPSO, Naini Tal 
    Ashoka, B. N; Seetha, S; Marar, T. M. K; Raj, E; Kasturirangan, K; Mahra, H. S (Astronomical Society of India, 1998)
  • Photometric observations of the AM CVn star EC 15330-1403 
    Seetha, S; Ashoka, B. N; Raj, E; Kasturirangan, K (Astronomical Society of India, 2000)
  • Photometric Observations of the X-Ray Dwarf Nova HL Canis Majoris 
    Seetha, S; Marar, T. M. K; Sharma, D. P; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (INSDOC, 1983-08)
    High speed optical photometric observations of the X-ray dwarf nova HL Canis Majoris (1E 0643-1648), discovered with the Einstein Observatory, are presented. Results of long term monitoring and attempts to detect photometric ...
  • Photometry of intermediate polars AO PSC and V 1223 SGR 
    Padmini, V. N; Marar, T. M. K; Seetha, S; Padmanabhan, P; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C; Kuppuswamy, K; Rozario, M. J (Springer, 1985-12)
    We present optical photometric observations of the cataclysmic variables AO Psc and V 1223 Sgr, both of which are believed to contain slowly-rotating white-dwarf pulsars. These objectes belong to the new class of intermediate ...
  • Search for optical bursts from the gamma ray burst source GBS 0526-66 
    Seetha, S; Sreenivasaiah, K. V; Marar, T. M. K; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (NASA/STI, 1985-08)
    Attempts were made to detect optical bursts from the gamma-ray burst source GBS 0526-66 during Dec. 31, 1984 to Jan. 2, 1985 and Feb. 23 to Feb. 24, 1985, using the one meter reflector of the Kavalur Observatory. Jan. 1, ...
  • Study of two pulsars with the Indian X-ray Astronomy Experiment 
    Mukerjee, K; Agrawal, P. C; Paul, B; Rao, A. R; Yadav, J. S; Seetha, S; Kasturirangan, K (Astronomical Society of India, 2000)
    The X-ray pulsars Cep X-4 and 4U 1907+09 were observed with the Indian X-ray Astronomy Experiment (IXAE). Observations of Cep-X4 were made during the declining phase of its latest 30 days outburst in 1997, July-August. The ...
  • Survey for roAp stars in the northern sky from Naini Tal 
    Ashoka, B. N; Seetha, S; Raj, E; Chaubey, U. S; Gupta, S. K; Joshi, S; Martinez, P; Kurtz, D. W; Sagar, R; Kasturirangan, K (Astronomical Society of India, 2000)
    Of the 31 known rapidly oscillating Ap (roAp) stars, 28 are in the southern sky and majority of them were discovered at SAAO indicating that a systematic survey also is needed in the northern sky. Therefore, a project has ...
  • X-ray bursts from GRS 1915+105 observed with IXAE 
    Yadav, J. S; Agrawal, P. C; Paul, B; Rao, A. R; Vahia, M. N; Seetha, S; Kasturirangan, K (Astronomical Society of India, 1999)
    The light curves of the galactic superluminal X-ray transient source GRS1915+105 observed with the pointed proportional counters (PPC) of Indian X-ray Astronomy Experiment (IXAE)on board IRS-P3 have revealed the presence ...
  • The X-ray observation of newly discovered transient XTE J1748-288 by the Indian X-ray Astronomy Experiment 
    Naik, S; Agrawal, P. C; Paul, B; Rao, A. R; Seetha, S; Kasturirangan, K (Astronomical Society of India, 2000)
    The observations of X-ray transient XTE J1748-288 were made in the energy band 2 - 18 keV with the Indian X-ray astronomy experiment (IXAE) during 1998, June 14-25 with total useful exposure of 27,100 second for 1 sec ...

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