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  • A search for QPOs in the lazar OJ287: preliminary results from the 2015/2016 observing campaign 
    Zola, S; Valtonen, M; Bhatta, G; Goyal, A; Debski, B; Baran, A; Krzesinski, J; Siwak, M; Ciprini, S; Gopakumar, A; Jermak, H; Nilsson, K; Reichart, D; Matsumoto, K; Sadakane, K; Gazeas, K; Kidger, M; Piirola, V; Alicavus, F; Baliyan, K. S; Berdyugin, A; Boyd, D; Campas Torrent, M; Campos, F; Carrillo G-mez, J; Caton, D. B; Chavushyan, V; Dalessio, J; Dimitrov, D; Drozdz, M; Er, H; Erdem, A; Escartin Perez, A; Fallah Ramazani, V; Filippenko, A. V; Garcia, F; Gomez Pinilla, F; Maheswar, G; Haislip, J. B; Harmanen, J; Hudec, R; Hurst, G; Ivarsen, K. M; Jelinek, M; Joshi, A; Kagitan, M; Kaur, N; Keel, W. C; LaCluyze, A. P; Lee, B. C; Lindfors, E; Lozano de Haro, J; Moore, J. P; Mugrauer, M; Naves Nogues, R; Neely, A. W; Nelson, R. H; Ogloza, W; Okano, S; Pandey, J. C; Perri, M; Pihajoki, P; Poyner, G; Provencal, J; Pursimo, T; Raj, A; 29 others (Molecular Diversity Preservation International, 2016-12)
    We analyse the light curve in the R band of the blazar OJ287, gathered during the 2015/2016 observing season. We did a search for quasi-periodic oscillations (QPOs) using several methods over a wide range of timescales. ...
  • Search for rapid H-alpha variability studies in Be stars - 28 Eri, X Ophiuchi, 66 Ophiuchi and Pi Aquarii 
    Ghosh, K. K (EDP Sciences, 1988-10)
    In order to search for rapid Hα variability in Be stars, a series of Hα profiles were observed on a time scale of few minutes for 28 Eri, X Oph, 66 Oph and π Aqr. In total, 95 and 54 Hα profiles were obtained for the program ...
  • Search for rapid spectral variability in Be stars - Alpha Columbae, Rho Carinae and Eta Centauri 
    Ghosh, K. K; Pukalenthi, S; Jaykumar, K; Kuppuswamy, K; Sanjeevkumar, T; Muniandi, A (European Southern Observatory, 1990-03)
    A series of H-alpha profiles (in total 1006 spectra in the H-alpha region) with the time resolution around 45 s were obtained on six nights between January 29 and February 7, 1988, to search for rapid spectral variability ...
  • Search for rapid spectral variability in Psi(9) Aurigae 
    Ghosh, K. K (Astronomical Society of the Pacific, 1989-09)
    Observations of Psi(9) Aur on five nights between January 29 and February 3, 1988 were conducted as part of a search for rapid spectral variability in Be stars. In addition, a series of H-alpha profiles with a time resolution ...
  • Search for rapid V/R variability in Eta CEN 
    Ghosh, K. K (Royal Astronomical Society, 1989-10)
    In order to search for rapid V/R variability in the Be star, Eta Cen, a series of H-alpha profiles of this star were observed on three nights between May 28 and June 3, 1986. A method of estimating the standard deviation ...
  • A Search for Rotationally Modulated Hα Variability in OB Supergiants 
    Morel, T; Marchenko, S. V; Pati, A. K; Kuppuswamy, K; Carini, M. T; Wood, E; Zimmerman, R (Cambridge University Press, 2004)
  • Search for short-term periodicities in the sun's surface rotation: a revisit 
    Javaraiah, J; Ulrich, R. K; Bertello, L; Boyden, J. E (Springer Netherlands, 2009-06)
    We have used the daily values of the equatorial rotation rate determined from the Mt. Wilson daily Doppler-velocity measurements during the period 3 December 1985 – 5 March 2007 to search for periodicities in the solar ...
  • A search for solar-like oscillations in the stars of M67 with CCD ensemble photometry on a network of 4 M telescopes 
    Gilliand, R. L; Brown, T. M; Kjeldsen, H; McCarthy, J. K; Peri, M. L; Belmonte, J. A; Vidal, I; Cram, L. E; Palmer, J; Frandsen, S; Parthasarathy, M; Petro, L; Schneider, H; Stetson, P. B; Weiss, W. W (American Astronomical Society, 1993-12)
    Results are presented from a large observational project directed toward the detection of solar-like oscillations in an ensemble of open cluster stars. Seven groups collaborated in 1992 January to observe twelve stars in ...
  • Search for TeV gamma-rays from Geminga pulsar 
    Singh, B. B; Chitnis, V. R; Bose, D; Rahman, M. A; Upadhya, S. S; Gothe, K. S; Nagesh, B. K; Purohit, P. N; Rao, S. K; Rao, K. K; Sharma, S. K; Sudersan, P. V; Venkateshmurthy, B. L; Vishwanath, P. R; Acharya, B. S (Elsevier, 2009-09)
    We present the results of observation of the Geminga pulsar carried out in the TeV energy band during the 6 year period spanning 2000–2006 using the Pachmarhi Array of Cherenkov Telescopes (PACT). A long stretch of data, ...
  • A search for TeV photons from 4U0115 + 63 
    Rannot, R. C; Bhat, C. L; Senecha, V. K; Sapru, M. L; Tickoo, A. K; Kaul, R. K; Rawat, H. S (Astronomical Society of India, 1993)
    An analysis of 47 hours of data collected by the Gulmarg gamma-ray telescope during the period 1989 September 27-October 30, indicates absence of a statistically significant steady, persistent-pulsed or episodic pulsed ...
  • The Search for the Electric Dipole Moment of the Electron (eEDM) in Mercury Halides Using the Relativistic Coupled Cluster Theory 
    Srinivasa Prasannaa, V (Indian Institute of Astrophysics, 2017-06)
    The electric dipole moment of the electron (eEDM) could arise due to the simultaneous violations of parity (P) and time reversal (T) symmetries. If observed, it would be an intrinsic property of the electron, like its ...
  • A Search for Unrecognized Carbon-Enhanced Metal-Poor Stars 
    Placco, V. M; Kennedy, C. R; Rossi, S; Beers, T. C; Christlieb, N; Sivarani, T (Cambridge University Press, 2010-03)
    We have developed a new procedure to search for Carbon-Enhanced Metal-Poor (CEMP) stars from the Hamburg/ESO (HES) prism-survey plates. This method uses an extended line index for the CH G-band, which we demonstrate to ...
  • A search for unrecognized carbon-enhanced metal-poor stars in the galaxy 
    Placco, V. M; Kennedy, C. R; Rossi, S; Beers, T. C; Lee, Y. S; Christlieb, N; Sivarani, T; Reimers, D; Wisotzki, L (Institute of Physics, 2010-03)
    We have developed a new procedure to search for carbon-enhanced metal-poor (CEMP) stars from the Hamburg/ESO (HES) prism-survey plates. This method employs an extended line index for the CH G band, which we demonstrate to ...
  • Search for variable stars in the open cluster NGC 2509 
    Dar, A. A; Parihar, P. S; Saleh, P; Malik, M. A (Elsevier B.V, 2018-10)
    This work presents the first photometric variability survey of the open cluster NGC 2509 carried out in February, 2017. Data of four nights was analysed by ensemble photometry technique, using 1k × 1k CCD and 1.3 m telescope ...
  • A Search for Vector Magnetic Field Variations Associated with the M-Class Flares of 10 June 1991 IN AR6659 
    Hagyard, M. J; Stark, B. A; Venkatakrishnan, P (Kluwer Academic Publishers, 1999-01)
    A careful analysis of a 6-hour time sequence of vector magnetograms of AR6659, observed on 10 June 1991 with the MSFC vector magnetograph, has revealed only minor changes in the vector magnetic field azimuths in the vicinity ...
  • Searches for Metal-poor Stars from the Hamburg/ESO Survey Using the CH G Band 
    Placco, V. M; Kennedy, C. R; Beers, T. C; Christlieb, N; Rossi, S; Sivarani, T; Lee, Young Sun; Reimers, D; Wisotzki, L (IOP Publishing, 2011-12)
    We describe a new method to search for metal-poor candidates from the Hamburg/ESO objective-prism survey (HES) based on identifying stars with apparently strong CH G-band strengths for their colors. The hypothesis we exploit ...
  • Searching for a Solar Source of Magnetic-Field Switchbacks in Parker Solar Probe’s First Encounter 
    Pablos, D. de; Samanta, T; Badman, S. T; Schwanitz, C; Harra, L. K; Petrie, G; Mac Cormack, C; Mandrini, C. H; Raouafi, N. E; Martinez Pillet, V; Velli, M (Springer Nature, 2022-07)
    Parker Solar Probe observations show ubiquitous magnetic-field reversals closer to the Sun, often referred to as “switchbacks”. The switchbacks have been observed before in the solar wind near 1 AU and beyond, but their ...
  • Searching for dual active galactic nuclei 
    Rubinur, K; Das, Mousumi; Kharb, P (Indian Academy of Sciences, 2018-02)
    Binary or dual active galactic nuclei (DAGN) are expected from galaxy formation theories. However, confirmed DAGN are rare and finding these systems has proved to be challenging. Recent systematic searches for DAGN using ...
  • Searching for dual AGN in galaxies with double-peaked emission line spectra using radio observations 
    Rubinur, K; Mousumi Das; Kharb, P (Oxford University Press on behalf of the Royal Astronomical Society, 2019-04)
    Supermassive black hole (SMBH) binaries form due to galaxy mergers and minor accretion events. When the SMBHs are accreting, they form dual or binary AGN and can give rise to double-peaked emission lines in the optical ...
  • Searching for GRB remnants in nearby galaxies 
    Bhargavi, S. G; Rhoads, J; Perna, R; Feldmeier, J; Greiner, J (American Institute of Physics, 2004-09)
    Gamma Ray Bursts (GRBs) are expected to leave behind GRB remnants, similar to how ``standard'' supernovae (SN) leave behind SN remnants. The identification of these remnants in our own and in nearby galaxies would allow a ...

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