ARIES Insitutional Digital Repositary (ARIES-IDR): Recent submissions

  • Facilities at ARIES for the Nainital–cape survey 
    Sagar, R.; Mary, D. L. (2005)
    A collaborative programme searching for mmag pulsations in chemically peculiar stars in the northern hemisphere was initiated in 1997 between Nainital, India, and Cape Town, South Africa. It was therefore named as the ...
  • The Nainital–cape survey: A search for variability in Ap and Am stars 
    Joshi, S. (2005)
    The “Nainital–Cape Survey” program for searching photometric variability in chemically peculiar (CP) stars was initiated in 1997 at ARIES, Nainital. We present here the results obtained to date. The Am stars HD98851, ...
  • Multi-wavelength observations of an unusual impulsive flare associated with CME 
    Uddin, W.; Jain, R.; Yoshimura, K.; Chandra, R.; Sakao, T.; Kosugi, T.; Joshi, A.; Despande, M. R. (2004)
    We present the results of a detailed analysis of multi-wavelength observations of a very impulsive solar flare 1B/M6.7, which occurred on 10 March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is ...
  • Intranight optical variability of BL Lacs, radio-quiet quasars and radio-loud quasars 
    Stalin, C. S.; Gupta, A. C.; Gopal-Krishna; Wiita, P. J.; Sagar, R. (2005)
    We report monitoring observations of 20 high- luminosity active galactic nuclei (AGN), 12 of which are radio-quiet quasars (RQQs). Intranight optical variability (INOV) was detected for 13 of the 20 objects, including ...
  • Wintertime spatial characteristics of boundary layer aerosols over peninsular India 
    Moorthy, K. K., ...et al. (including Saha, A.) (2005-04-30)
    During an intense field campaign for generating a spatial composite of aerosol characteristics over peninsular India, collocated measurements of the mass concentration and size distribution of near-surface aerosols were ...
  • A comparative study of the intra-night optical variability of powerful AGNs 
    Stalin, C. S.; Gopal-Krishna; Sagar, R.; Wiita, P. J. (2002)
    In order to address a currently much debated issue, we are carrying out a systematic search for intra-night optical micro-variability in major classes of powerful (Mᵥ ≥ -23.0 mag)active galactic nuclei (AGNs). Our sample ...
  • On mass and velocity distributions in members of star clusters: an analytical approach 
    Chatterjee, S.; Kumar, B.; Sagar, R. (2002)
    Dynamical evolution of stellar mass distribution in star clusters is analysed by considering simultaneously the effects of dynamical friction, stochastic heating and the gravitational potential due to mass distribution in ...
  • New survey of UBV photometry and absolute paper motions at internediate latitude 
    Ojha, D. K.; Bienayme, O.; Mohan, V.; Robin, A. C. (1999)
    A photometric and proper motion survey has been obtained in 2 directions at intermediate latitude: (l = 167.5° , b = 47.4° ; α₂ₒₒₒ= 9ʰ 41ᵐ 26ᶳ ,δ₂ₒₒₒ = +49° 53' 27” ) and (l = 278° , b = 47° ; α₂ₒₒₒ = 11ʰ 42ᵐ 56ᶳ , δ₂ₒₒₒ ...
  • AVG Antivirus 
    Unknown author (2009)
  • Stellar contents of two young open clusters: NGC 663 and 654 
    Pandey, A. K.; Upadhyay, K.; Ogura, K.; Sagar, R.; Mohan, V.; Mito, H.; Bhatt, H. C.; Bhatt, B. C. (2005)
    UBVRI CCD photometry in a wide field around two young open clusters, NGC 663 and 654, has been carried out. Hα and polarimetric observations for the cluster NGC 654 have also been obtained. We use the photometric data ...
  • Photometric study of two novae in M 31 
    Joshi, Y. C.; Pandey, A. K.; Narasimha, D.; Giraud-Heraud, Y.; Sagar, R.; Kaplan, J. (2004)
    We report R ̜ I ̜ light curves of 2 novae in the M 31 galaxy which were detected in the four year Nainital Microlensing Survey. One of these novae has been tracked from the initial increase in flux while other has been ...
  • Multiband optical photometry and bolometric light curve of the Type Ia supernova 2004S 
    Misra, K.; Kamble, A. P.; Bhattacharya, D.; Sagar, R. (2005)
    We present BVR ̜ I ̜ broad-band CCD photometry of the Type Ia supernove SN 2004S, which appeared in the galaxy MCG-05-16-021, obtained during 2004 February 12 to March 22. We present multiband and bolometric light curves ...
  • Studies of chemically peculiar stars 
    Joshi, S. (2005)
    This thesis is on the framework of the “NainiTal-Cape Survey" programme for searching photometric variability in chemically peculiar stars, initiated in 1997 at the ARIES, NainiTal, India, in collaboration with the South ...
  • VLT-UVES analysis of two giants in the bulge metal-poor globular cluster HP-1: Analysis of two giants in HP-1 
    Barbuy, B.; Zoccali, M.; Ortolani, S.; Momany, Y.; Minniti, D.; Hill, V.; Renzini, A.; Rich, R. M.; Bica, E.; Pasquini, L.; Yadav, R. K. S. (2006)
    Metal-poor globular clusters in the bulge are important tracers of early chemical evolution. HP-1 is among the six metal-poor clusters within 5º of the Galactic center, and could be the one closest to the center. The main ...
  • Unravelling the nature of HD81032: A new RS CVn binary 
    Pandey, J. C.; Singh, K. P.; Drake, S. A.; Sagar, R. (2005)
    BVR photometric and quasi-simultaneous optical spectroscopic observations of the star HD81032 have been carried out during the years 2000–2004. A photometric period of 18.802 ± 0.07d has been detected for this star. A large ...
  • Optical observations of GRB afterglows from India 
    Sagar, R.; Misra, K. (2005)
    Optical observations of GRB afterglows provide information about GRB distances as well as their isotropic/non-isotropic nature of emission. More than 30 GRB fields have been probed by us during 1999 to 2003, out of which ...
  • Multiband optical monitoring of the blazars S5 0716+714 and BL Lacertae 
    Stalin, C. S.; Gopal-Krishna; Sagar, R.; Wiita, P. J.; Mohan, V.; Pandey, A. K. (2006)
    We report the results of multiband optical photometric monitoring of two well-known blazars, S5 0716+714 and BL Lacertae, carried out during 1996 and 2000–01 with an aim to study optical variations on time-scales ranging ...
  • Periodicities in sunspot activity during solar cycle 23 
    Joshi, B.; Pant, P.; Manoharan, P. K. (2006)
    The data of sunspot numbers, sunspot areas and solar flare index during cycle 23 are analyzed to investigate the intermediate- term periodicities. Power spectral analysis has been performed separately for the data of ...
  • A statistical analysis of the detection limits of fast photometry 
    Mary, D. L. (2006)
    This work investigates the statistical limits for the detection of stellar variability using ground based fast photometry. We show that when sky transparency variations are very low or have been efficiently removed from ...
  • Origin of disc lopsidedness in the Eridanus group of galaxies 
    Angiras, R. A.; Jog, C. J.; Omar, A.; Dwarakanath, K. S. (2006)
    The H I surface density maps for a sample of 18 galaxies in the Eridanus group are Fourier analysed. This analysis gives the radial variation of the lopsidedness in the H I spatial distribution. The lopsidedness is ...

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