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Browsing Publications based on data from IAO, Hanle by Title

Browsing Publications based on data from IAO, Hanle by Title

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  • Mass function of open clusters NGC 1857 and Czernik 25 
    Sujatha, S; Babu, G. S. D; Ananthamurthy, S (Astronomical Society of India, 2006)
    The first CCD photometric UBVRI observations of the open clusters NGC 1857 (Czernik 20, OCl 427) and Czernik 25 (OCl 493) are presented. The observations were obtained on 28 November 2003 with the 2m Himalayan Chandra ...
  • Mass of the black hole in the Seyfert 1.5 galaxy H 0507+164 from reverberation mapping 
    Stalin, C. S; Jeyakumar, S; Coziol, R; Pawase, R. S; Thakur, S. S (Wiley-Blackwell, 2011-09)
    We present the results of our optical monitoring campaign of the X-ray source H 0507+164, a low-luminosity Seyfert 1.5 galaxy at a redshift z= 0.018. Spectroscopic observations were carried out during 22 nights in 2007, ...
  • Measurements of 220 GHz atmospheric transparency at IAO, Hanle, during 2000-2003 
    Ananthasubramanian, P. G; Yamamoto, S; Prabhu, T. P; Angchuk, D (Astronomical Society of India, 2004-06)
    A 220 GHz tipping radiometer was installed at the Indian Astronomical Observatory (IAO), Hanle (Latitude 32o46'46" N; Longitude 78o57'51" E; Altitude 4500 m, above msl) towards the end of December 1999. The system is in ...
  • A mini ACT experiment at low and high altitudes 
    Vishwanath, P. R; Acharya, B. S; Bhat, P. N; Chitnis, V. R (Tata Institute of Fundamental Research, 2005)
    A simple experimental apparatus was used to measure rate of cosmic ray events due to Atmospheric Cerenkov Radiation at two mountain altitude sites with the height difference of 3.5 km. The event rates at Hanle (altitude ...
  • Multi-observatory observations of night-side of Venus at 2.3 micron - atmospheric circulation from tracking of cloud features 
    Limaye, S; Warell, J; Bhatt, B. C; Fry, P. M; Young, E. F (Astronomical Society of India, 2006)
    Observations of Venus were made during 3 May to 11 May 2004 (117.4o - 125.7o phase angle) and 3 July to 10 July, 2004 (132.5o - 125.1o phase angle) from the 1.2-metre Mt. Abu Telescope at Gurushikhar, Himalayan Chandra ...
  • Multi-wavelength afterglow observations of the high redshift GRB 050730 
    Pandey, S. B; Castro-Tirado, A. J; McBreen, S; Pérez-Ramírez, M. D; Bremer, M; Guerrero, M. A; Sota, A; Cobb, B. E; Jelínek, M; de Ugarte Postigo, A; Gorosabel, J; Guziy, S; Guidorzi, C; Bailyn, C. D; Muñoz-Darias, T; Gomboc, A; Monfardini, A; Mundell, C. G; Tanvir, N; Levan, A. J; Bhatt, B. C; Sahu, D. K; Sharma, S; Bogdanov, O; Combi, J. A (EDP Sciences, 2006-12)
    Context.GRB 050730 is a long duration high-redshift burst (z=3.967) that was discovered by Swift. The afterglow shows variability and was well monitored over a wide wavelength range. We present comprehensive temporal and ...
  • Multiwavelength Analysis of the Intriguing GRB 061126: The Reverse Shock Scenario and Magnetization 
    Gomboc, A; Kobayashi, S; Guidorzi, C; Melandri, A; Mangano, V; Sbarufatti, B; Mundell, C. G; Schady, P; Smith, R. J; Updike, A. C; Kann, D. A; Misra, K; Rol, E; Pozanenko, A; Castro-Tirado, A. J; Anupama, G. C; Bersier, D; Bode, M. F; Carter, D; Curran, P; Fruchter, A; Graham, J; Hartmann, D. H; Ibrahimov, M; Levan, A; Monfardini, A; Mottram, C. J; O'Brien, P. T; Prema, P; Sahu, D. K; Steele, I. A; Tanvir, N. R; Wiersema, K (The American Astronomical Society, 2008-11)
    We present a detailed study of the prompt and afterglow emission from Swift GRB 061126 using BAT, XRT, UVOT data and multicolor optical imaging from 10 ground-based telescopes. GRB 061126 was a long burst (T90=191 s) with ...
  • 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 (Wiley-Blackwell, 2011-03)
    We present a comprehensive multiwavelength analysis of the young cluster NGC 1624 associated with the H ii region Sh2-212 using optical UBVRI photometry, optical spectroscopy and GMRT radio continuum mapping along with the ...
  • A multiwavelength study of star formation in the vicinity of galactic H II region Sh 2-100 
    Samal, M. R; Pandey, A. K; Ojha, D. K; Ghosh, S. K; Kulkarni, V. K; Kusakabe, N; Tamura, M; Bhatt, B. C; Thompson, M. A; Sagar, R (The American Astronomical Society, 2010-05)
    We present multiwavelength investigation of morphology, physical-environment, stellar contents, and star formation activity in the vicinity of star-forming region Sh 2-100. It is found that the Sh 2-100 region contains ...
  • Multiwavelength Study of the NGC 281 Region 
    Sharma, S; Pandey, A. K; Pandey, J. C; Chauhan, N; Ogura, K; Ojha, D. K; Borrissova, J; Mito, H; Verdugo, T; Bhatt, B. C (Astronomical Society of Japan, 2012-10)
    We present a multiwavelength study of the NGC 281 complex which contains the young cluster IC 1590 at the center, using deep wide-field optical UBV Ic photometry, slitless spectroscopy along with archival data sets in ...
  • A multiwavelength study of the remnant of nova GK Persei 
    Anupama, G. C; Kantharia, N. G (EDP Sciences, 2005-09)
    We present new observations of the nebular remnant of the old nova GK Persei 1901 in the optical using the Himalayan Chandra Telescope (HCT) and at low radio frequencies using the Giant Metrewave Radio Telescope (GMRT). ...
  • Near-infrared JH photometry of young open cluster Be 59 
    Sharma, S; Ogura, K; Pandey, A. K; Ojha, D. K; Bhatt, B. C (Astronomical Society of India, 2007)
    We present near-infrared J H photometry and optical slitless spectroscopy of stars in the field of the young cluster Be 59. The J /(J- H )colour-magnitude diagram of the cluster yields a distance modulus of (m - M )0= 10.0 ...
  • A new search for variable stars in the globular cluster NGC 6366 
    Ferro, A. A; Giridhar, S; Lopez, V. R; Figuera, R; Bramich, D. M; Rosenzweig, P (Instituto de Astronomía, 2008-10)
    New CCD photometry of NGC 6366 has lead to the discovery of some variable stars. Two possible Anomalous Cepheids (or Pop II Cepheids), three long period variables, one SX Phe and one eclipsing binary have been found. Also, ...
  • 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 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 ...
  • 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 ...
  • Nova V4444 Sagittarii 1999 in the early decline and quiescent phases 
    Kamath, U. S; Ashok, N. M; Anupama, G. C (Astronomical Society of India, 2008-12)
    We present near-infrared and optical spectra of the fast nova V4444 Sagittarii at two single epochs in the early decline phase and unfiltered images obtained in quiescence. Based on this and other available data, we discuss ...

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