Research Papers: Recent submissions

  • Light variation of the delta Scuti star 38 CNC 
    Gupta, S. K. (1979)
    The light curves of the δ Scuti variable 38 Cnc, which is member of the Praesepe cluster, have been analysed using the techniques of perodogram analysis and least square solutions. The star pulsates in the second overtone ...
  • SN 2008in − bridging the gap between normal and faint supernovae of type IIP 
    Roy, R.,... et al. (IOP Publishing Limited, 2011-08)
    We present optical photometric and low-resolution spectroscopic observations of the Type II plateau supernova (SN) 2008in, which occurred in the outskirts of the nearly face-on spiral galaxy M 61. Photometric data in the ...
  • Molecular line haze opacity in sunspots 
    Gaur, V. P.; Pande, M. C.; Sah, M. (1979)
    It has been shaown that bound-bound opacity due to electronic transitions of molecules CN, CaH, MgH and TiO explains, in first approximation, the line haze opacity postulated by Zwaan (1974) for the region 0.5 µm to 0.9 ...
  • Classification of M-type stars from spectral scans 
    Rautela, B. S.; Joshi, S. C. (1979)
    Continuous spectral scans of 64 M-type stars in the wavelength region 400-750 nm have been obtained with a bandwidth of 5 nm. The scans have been placed on an absolute energy scale. In this paper we discuss three classification ...
  • Solar photospheric models and the rotational temperatures of the C₂ and MgH molecules 
    Singh, K.; Shukla, D. S.; Tripathi, B. M. (1979)
    Four photospheric models have been utilized to derive model based rotational temperatures of the (0-0) band of the Swan system of C₂ and that of the green system of the MgH molecules. The dissociation energies were varied ...
  • CH and CH⁺ lines in facula models 
    Tripathi, B. M. (1978)
    Equivalent width calculations for CH and CH⁺ are carried out in three facula models. For CH, the λ4313.662 A line of the (0-0) and of the transition ²∆ - ²II of the Q₁c branch, and for CH⁺ , the λ 4288.047 A line of the ...
  • Study of the galactic cluster NGC 581 
    Sagar, R.; Joshi, U. C. (1978)
    Photoelectric magnitudes and colours in the UBV system have been determined for 73 stars in NGC 581. The value of the interstellar reddening is 0 ͫ . 38. The distance modulus to the cluster is estimated at 12 ͫ .16±0 ͫ .1 ...
  • On the rotational temperature of Tio in sunspots 
    Sinha, K. (1977)
  • Observations of the ultra-fast Kelvin wave in the tropical mesosphere during equinox 
    Guharay, A.; Pant, P.; Pande, B.; Pandey, K. (2011-06-10)
    Regular and systematic measurements of mesospheric temperatures have been carried out during March and April 2007 to determine planetary-scale wave activities in the tropical region, utilizing ground-based Rayleigh Light ...
  • Spectral and photometric monitoring of distant core-collapse supernovae in the SAO RAS 
    Moskvitin, A. S.; Sokolov, V. V.; Komarova, V. N.; Drake, A. J.; Roy, R.; Tsvetkov, D. Yu. (2010)
    This paper describes the aims, objectives and first results of the observational program for the study of distant core-collapse supernovae (SNe) with redshifts z≤0.3. This work is done within the framework of an international ...
  • The discovery and nature of optical transient css100217:102913+404220 
    Drake, A. J.,.. et al. (including Roy, R. & Kumar, B.) (2011-07-10)
    We report on the discovery and observations of the extremely luminous optical transient CSS100217:102913+404220 (CSS100217 hereafter). Spectroscopic observations showed this transient was coincident with a galaxy at ...
  • Actors of the main activity in large complex centres during the 23 solar cycle maximum 
    Schmieder, B., ... et al. (including Uddin, W. & Kumar, P.) (2011-02-25)
    During the maximum of Solar Cycle 23, large active regions had a long life, spanning several solar rotations, and produced large numbers of X-class flares and CMEs, some of them associated to magnetic clouds (MCs). This ...
  • Discovery of the first giant double radio relic in a galaxy cluster found in the PLANCK SUNYAEV–ZEL’DOVICH cluster survey: plck G287.0+32.9 
    Bagchi, J., ...et al. (including Joshi, S.) (2011-07-20)
    We report the discovery of large-scale diffuse non-thermal radio emission in PLCK G287.0+32.9, an exceptionally hot (T ∼13 keV), massive, and luminous galaxy cluster, strongly detected by the Planck satellite in a recent, ...
  • A study of giant radio galaxies at RATAN-600 
    Khabibullina, M. L.; Verkhodanov, O. V.; Singh, M.; Pirya, A.; Nandi, S.; Verkhodanova, N. V. (2011)
    We report the results of flux density measurements in the extended components of thirteen giant radio galaxies, made with the RATAN-600 in the centimeter range. Supplementing them with the WENSS, NVSS and GB6 survey data ...
  • Searching for needles in haystacks—looking for gamma-ray burst γ –rays with the FERMI/LAT detector 
    Akerlof, C. W.; Zheng, W.; Pandey, S. B.; McKay, T. A. (2011-01-01)
    Since the launch of the Fermi Gamma-ray Space Telescope on 2008 June 11, 55 gamma-ray bursts (GRBs) have been observed at coordinates that fall within 66◦ of the Fermi Large Area Telescope (LAT) boresight with precise ...
  • A Second Set of RATAN-600 Observations of Giant Radio Galaxies 
    Khabibullina, M. L.; Verkhodanov, O. V.; Singh, M.; Pirya, A.; Nandi, S.; Verkhodanova, N. V. (2011)
    Results of RATAN-600 centimeter-wavelength flux-density measurements of the extended components in five giant radio galaxies are reported. The spectra of the components of these radio galaxies have been constructed using ...
  • A multiwavelength census of stellar contents in the young cluster NGC 1624 
    Jose, J.; Pandey, A. K.; Ogura, K.; Ojha, D. K.; Bhatt, B. C.; Samal, M. R.; Chauhan, N.; Sahu, D. K.; Rawat, P. S. (2011)
    We present a comprehensive multiwavelength analysis of the young cluster NGC 1624 associated with the HII region Sh2-212 using optical UBVRI photometry, optical spectroscopy and GMRT radio continuum mapping along with ...
  • Intranight variability of 3C 454.3 during its 2010 November outburst 
    Bachev, R.; Semkov, E.; Strigachev, A.; Mihov, B.; Gupta, A. C.; Peneva, S.; Ovcharov, E.; Valcheva, A.; Lalova, A. (2011)
    Context. 3C 454.3 is a very active flat spectrum radio quasar (blazar) that has undergone a recent outburst in all observed bands,including the optical. Aims. In this work we explore the short-term optical variability of ...
  • A multiwavelength polarimetric study towards the open cluster NGC1893 
    Eswaraiah, C.; Pandey, A. K.; Maheswar, G.; Medhi, B. J.; Pandey, J. C. (2011)
    We present multiwavelength linear polarimetric observations for 44 stars of the NGC1893 young open cluster region along with V-band polarimetric observations of stars of four other open clusters located between l ∼ 160◦ ...
  • Optical intraday variability studies of 10 low energy peaked blazars 
    Rani, B.; Gupta, A. C.; Joshi, U. C.; Ganesh, S.; Wiita, P. J. (2011)
    We have carried out optical (R band) intraday variability (IDV) monitoring of a sample of 10 bright low energy peaked blazars (LBLs). 40 photometric observations, of an average of ∼4 h each, were made between 2008 September ...

Search ARIES-IDR


Advanced Search

Browse

My Account

Context