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Browsing Publications of Astronomical Society of India by Author "Tandon, S. N"

Browsing Publications of Astronomical Society of India by Author "Tandon, S. N"

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  • Balloon-borne far-infrared mapping of galactic star forming regions 
    Das, B; Ghosh, S. K; Rengarajan, T. N; Verma, R. P; Iyengar, K. V. K; Tandon, S. N (Astronomical Society of India, 1993)
    Large angular areas (greater than 500 sq arcmin each) covering the three Galactic star forming regions (NGC 2024, OMC-1/OMC-2, and IRAS 06058 + 2138 and its neighborhood) have been mapped in two FIR bands (58 and 150 ...
  • Eighth ESLAB Symposium on HII Regions and the Galactic Centre 
    Tandon, S. N (Astronomical Society of India, 1974-09)
  • Exposure time calculator for IFOSC and sky background estimation 
    Chakraborty, P; Das, H. K; Tandon, S. N (Astronomical Society of India, 2005-12)
    Abstract. This paper describes a spectroscopy exposure time calculator for the faint object spectrograph, the \IUCAA Faint Object Spectrograph" (IFOSC). It is intended to provide reasonable estimates of exposure times for ...
  • Far infrared mapping of three galactic star forming regions 
    Ghosh, S. K; Mookerjea, B; Rengarajan, T. N; Tandon, S. N; Verma, R. P (Astronomical Society of India, 2001)
    Three Galactic star forming regions in the northern sky, viz., associated with W3(OH), S209 and S187 have been simultaneously mapped in two trans-IRAS far infrared (FIR) bands centered at ~ 140 and 200 μm using the TIFR ...
  • An implementation of transfer-pupil in a spectrograph on optical telescopes 
    Das, H. K; Kohok, A; Tandon, S. N (Astronomical Society of India, 2004-06)
    Based on the transfer pupil technique we develop a method to measure the lower order aberration coeffcients for optical telescopes; the method makes use of a Hartmann mask in a spectrograph for sampling the wavefront at ...
  • Infrared emission from IRAS 00338+6312 
    Mookerjea, B; Ghosh, S. K; Karnik, A. D; Rengarajan, T. N; Tandon, S. N; Verma, R. P (Astronomical Society of India, 1999)
    The Galactic star forming region associated with IRAS 00338+6312 has been mapped in 2 Far Infrared (FIR) bands centered around 140 & 185 μm, using the TIFR 100 cm balloon-borne telescope with liquid 3/sup He cooled bolometer ...
  • Infrared spectral energy distribution of four star forming regions 
    Karnik, A. D; Ghosh, S. K; Rengarajan, T. N; Tandon, S. N; Verma, R. P (Astronomical Society of India, 1999)
    Star forming regions associated with IRAS 19181+1349, 20255+3712, 20178+4046 and 10049+5657 have been mapped simultaneously in two far infrared bands (λeff ~ 130 and 210 µm), using TIFR 1m balloon borne telescope with ...
  • Instrumentation for the IUCAA telescope 
    Tandon, S. N (Astronomical Society of India, 1998)
  • IUCAA 2 meter telescope and its first light instrument IFOSC 
    Gupta, R; Burse, M; Das, H. K; Kohok, A; Ramaprakash, A. N; Engineer, S; Tandon, S. N (Astronomical Society of India, 2002-09)
    The various features of the IUCAA 2-meter telescope, its site parameters and considerations made for preserving the local seeing in terms of ventilation, thermal emissivity of the dome etc are described. The first ...
  • Magnetic fields in molecular clouds 
    Ramaprakash, A. N; Gupta, R; Tandon, S. N (Astronomical Society of India, 1998)
  • Near Infrared PICNIC Imager (NIPI) - A Progress Report 
    Deep, A; Ramaprakash, A. N; Tandon, S. N; Gupta, R; Burse, M. P; Chordia, P. A; Das, H. K; Engineer, S; Kohok, A. A; Mestry, V. B (Astronomical Society of India, 2003)
    In the ASI 2002 meeting we presented a preliminary design of Near Infrared PICNIC Imager (Deep et al, 2002). In this paper we will show the progress that has been made since then.
  • Near Infrared PICNIC Imager (NIPI) for IUCAA Telescope 
    Deep, A; Ramaprakash, A. N; Tandon, S. N; Gupta, R; Burse, M. P; Chordia, P. A; Das, H. K; Engineer, S; Kohok, A. A; Mestry, V. B (Astronomical Society of India, 2002-09)
    In this paper we present the current status of development of the Near Infrared PICNIC Imager (NIPI), which will be the first near-ffi instrument on IUCAA telescope. When used at one of the Cassegrain side ports of ...
  • New generation optical telescopes and plans for a large optical telescope in India 
    Tandon, S. N (Astronomical Society of India, 1993)
    The large optical telescopes which are being made now or are under planning differ from the older telescopes in many basic features: the primary mirrors are faster (f/2 or so) and much lighter, the altitude-azimuth mounting ...
  • New opportunities for Indian space astronomy 
    Tandon, S. N (Astronomical Society of India, 2005-09)
  • Optical identification of equatorial infrared catalogue number 1 sources previously identified with only AFGL sources 
    Iyengar, K. V. K; Tandon, S. N; Verma, R. P (Astronomical Society of India, 1983-09)
    We have identified, using Palomar Observatory Sky Survey (POSS) prints, the optical counterparts of six of the seven sources from the Equatorial Infrared Catalogue Number 1 (EIC-1) previously identified by Sweeney et al. ...
  • Science with IUCAA telescope 
    Srianand, R; Gupta, R; Kembhavi, A; Ramaprakash, A. N; Tandon, S. N (Astronomical Society of India, 2002-09)
    We present a brief overview of the proposed astronomical observations using the first light instrument !FOSC for the WCAA 2 m telescope.
  • Site characterisation for the IUCAA telescope 
    Das, H. K; Menon, S. M; Paranjpye, A; Tandon, S. N (Astronomical Society of India, 1999)
    We present the report on characterisation of the site for IUCAA telescope, which was conducted during October '96 to April '97. The main points highlighted are the results on : seeing, contribution of atmospheric turbulence ...

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