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  • New telescopes in India 
    Bhattacharyya, J. C (D. Reidel Publishing Co., 1986-01)
    The review covers the description and present status of the two optical/infrared telescopes designed and presently near fabrication in India. The 234 cm aperture optical telescope expected to be installed at Kavalur shortly ...
  • A new three-band, two beam astronomical photo-polarimeter 
    Srinivasulu, G; Raveendran, A. V; Muneer, S; Mekkaden, M. V; Jayavel, N; Somashekar, M. R; Sagayanathan, K; Ramamoorthy, S; Rosario, M.; Jayakumar, K (Astronomical Society of India, 2014-09)
    We designed and built a new astronomical photo-polarimeter that can measure linear polarization simultaneously in three spectral bands. It has a Calcite beamdisplacement prism as the analyzer. The ordinary and extra-ordinary ...
  • New variables in M5 (NGC 5904) and some identification corrections 
    Arellano Ferro, A; Bramich, D. M; Giridhar, S; Luna, A; Muneer, S (Konkoly Observatory, 2015-04)
    We report twelve variables not previously detected in the globular cluster M5 (NGC 5904); one SX Phe and eleven semi-regular variables (SR). Their identifications, equatorial coordinates, ephemerides, and light curves are ...
  • New views of southern nearside lunar highland composition from the chandrayaan-1 x-ray spectrometer (C1XS) 
    Athiray, P. S; Narendranath, S; Sreekumar, P (2016-10)
    Lunar surface elemental abundances - Results from Chandrayaan-1 X-ray Spectrometer (C1XS) on-board Chandrayaan-1 and goals for the upcoming Chandrayaan-2 Large Area Soft X-ray Spectrometer (CLASS) experiment on-board ...
  • A Newtonian interpretation of the parameter "a" associated with the Kerr metric 
    Sengupta, S (World Scientific Publishers, 1996-06)
    The parameter "a" associated with the Kerr metric has been used to determine the rotationally induced quadrapole electric field outside a rotating massive object with external dipole magnetic field. A comparison of the ...
  • Next Decade in the Study of Solar and Stellar Atmospheres 
    Abhyankar, K. D (Astronomical Society of India, 1974-03)
  • Next Generation Software Based Instruments for Pulsar Astronomy 
    Joshi, B. C; Lyne, A. G; Kramer, M (Astronomical Society of India, 2003)
    High time resolution studies of pulsars require specialized instrumentation to counter the degradation in the quality and time resolution of their radio signals due to dispersion in the inter-stellar medium. The availability ...
  • NGC 1245 - an intermediate age open cluster 
    Subramaniam, A (Astronomical Society of India, 2003)
    The B, V CCD photometry of 916 stars in the field of the high galactic latitude intermediate age open cluster NGC 1245 is presented. The cluster parameters were estimated with the help of V vs(B-V) colour magnitude diagram ...
  • NGC 146: a young open cluster with a Herbig Be star and intermediate mass pre-main sequence stars 
    Subramaniam, A; Sahu, D. K; Sagar, R; Vijitha, P (EDP Sciences, 2005-09)
    We present UBV CCD photometry and low-resolution spectra of stars in the field of the young open cluster NGC 146. UBV photometry of 434 stars were used to estimate the E(B-V) reddening of 0.55 $\pm$ 0.04 mag and BV photometry ...
  • NGC 1624 (OCl 403, Cr 53) – A very young open cluster 
    Sujatha, S; Babu, G. S. D (Springer, 2006)
    We present the first CCD photometric UBVRI observations of the not-so-well-studied open cluster NGC 1624 (OCl 403, Cr 53; α2000 = 04 h 40 m 36 s; δ2000 = + 50˚ 27′ 42″ Trumpler class = I 2 p N). This cluster was observed ...
  • NGC 1624-2: a slowly rotating, X-ray luminous Of?cp star with an extraordinarily strong magnetic field 
    Wade, G. A; Maiz, J. A; Martins, F; Petit, V; Grunhut, J; Walborn, N. R; Barba, R. H; Gagne, M; Garcia-Melendo, E; Jose, J; Moffat, A. F. J; Naze, Y; Neiner, C; Pellerin, A; Penades, O. M; Shultz, M; Simon-Diaz, S; Sota, A (Wiley-Blackwell, 2012-09)
    This paper presents a first observational investigation of the faint Of?p star NGC 1624-2, yielding important new constraints on its spectral and physical characteristics, rotation, magnetic field strength, X-ray emission ...
  • NGC 6712: the variable star population of a tidally disrupted globular cluster 
    Deras, D; Arellano Ferro, A; Lazaro, C; Bustos Fierro, I. H; Calderon, J. H; Muneer, S; Giridhar, S (Oxford University Press on behalf of the Royal Astronomical Society, 2020-04)
    We present an analysis of VI CCD time-series photometry of globular cluster NGC 6712. Our main goal is to study the variable star population as indicators of the cluster mean physical parameters. We employed the Fourier ...
  • NGC 7419: a young open cluster with a number of very young intermediate mass pre-MS stars 
    Subramaniam, A; Mathew, B; Bhatt, B. C; Ramya, S (Blackwell Publishing, 2006-06)
    We present a photometric and spectroscopic study of the young open cluster NGC 7419, which is known to host a large number of classical Be stars for reasons not well understood. Based on CCD photometric observations of 327 ...
  • NIFS : A Near Infrared Imaging Fabry-Perot Spectrometer 
    Anandarao, B. G; Nanda Kumar, M. S; Jog, N. S; Patel, R. T (Astronomical Society of India, 2000)
    We describe here a Near-Infrared Imaging Fabry-Perot Spectrometer (NIFS ) operating in the K band to provide a maximum spectral resolution of 2000-3000 over two optional fields of view of ~ 2? x 2? and 4? x 4? with plate ...
  • Night sky at the Indian Astronomical Observatory during 2000-2008 
    Stalin, C. S; Hegde, M; Sahu, D. K; Parihar, P. S; Anupama, G. C; Bhatt, B. C; Prabhu, T. P (Astronomical Society of India, 2008-09)
    This paper presents an analysis of the optical night sky brightness and extinction coefficient measurements in UBVRI at the Indian Astronomical Observatory (IAO), Hanle, during the period 2000–2008. They are obtained from ...
  • Night Sky Extinction Measurements at the Indian Astronomical Observatory, Hanle 
    Parihar, P. S; Sahu, D. K; Bhatt, B. C; Subramaniam, A; Anupama, G. C; Prabhu, T. P (Astronomical Society of India, 2003)
    We present the estimates of the night sky extinction at the Indian Astronomical Observatory. Also presented are the estimates of the night sky brightness. The extinction in the U band at IAO is found to be lower than the ...
  • Night time geomagnetic effects of solar flares 
    Sastri, J. H (European Geophysical Society, 1975-07)
    A study of the normal run magnetogram data of two equatorial stations, Kodaikanal (Geo. Long. 77 deg 28 min E, Dip 3.5 deg N) and Huancayo (Geo. Long. 75 deg 20 min W, Dip 2.0 deg N), for a three year period (1969-1971), ...
  • Night time variation of Fried's parameter at VBT, Kavalur 
    Saha, S. K; Chinnappan, V (Astronomical Society of India, 1999)
    The night time variation of the Fried's parameter, r lower script o is measured on 28-29 March 1991, at the Cassegrain focus of 2.34 m Vainu Bappu Telescope (VBT), at Vainu Bappu Observatory (VBO), Kavalur, India, using ...
  • Nighttime Pi2 micropulsations at Kodaikanal 
    Sastri, J. H; Murthy, B. S (National Institute of Science Communication And Information Resources, 1975-09)
  • Nighttime thermospheric meridional winds at Cachoeira Paulista (23°S, 45°W): Evidence for effects of the equatorial midnight pressure bulge 
    Batista, I. S; Sastri, J. H; de Medeiros, R. T; Abdu, M. A (American Geophysical Union, 1997-08)
    We have studied the local time and seasonal variations of thermospheric nighttime meridional winds at the low-latitude station, Cachoeira Paulista, Brazil, corresponding to quiet geomagnetic conditions of high solar activity ...

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