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Browsing IIAP Publications by Title

Browsing IIAP Publications by Title

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  • The broad-line type ic supernova SN 2007ru: adding to the diversity of type ic supernovae 
    Sahu, D. K; Tanaka, M; Anupama, G. C; Gurugubelli, U. K; Nomoto, K (Institute of Physics, 2009-05)
    Photometric and spectral evolution of the Type Ic supernova SN 2007ru until around 210 days after maximum are presented. The spectra show broad spectral features due to very high expansion velocity, normally seen in ...
  • Broad-line Type Ic supernova SN 2014ad 
    Sahu, D. K; Anupama, G. C; Chakradhari, N. K; Srivastav, S; Tanaka, M; Maeda, K; Nomoto, K (Oxford University Press on behalf of the Royal Astronomical Society, 2018-04)
    We present optical and ultraviolet photometry and low-resolution optical spectroscopy of the broad-line Type Ic supernova SN 2014ad in the galaxy PGC 37625 (Mrk 1309), covering the evolution of the supernova during −5 to ...
  • Broadband observations of high redshift blazars 
    Paliya, Vaidehi S; Parker, M. L; Fabian, A. C; Stalin, C. S (IOP Publishing, 2016-07-01)
    We present a multi-wavelength study of four high redshift blazars, S5 0014+81 (z = 3.37), CGRaBS J0225+1846 (z = 2.69), BZQ J1430+4205 (z = 4.72), and 3FGL J1656.2−3303 (z = 2.40) using quasi-simultaneous data from the ...
  • Broadband observations of the gamma-ray emitting narrow line Seyfert 1 galaxy SBS 0846+513 
    Paliya, Vaidehi S; Rajput, Bhoomika; Stalin, C. S; Pandey, S. B (IOP Publishing, 2016-03)
    We present the results of our broadband study of the γ -ray emitting narrow line Seyfert 1 ( NLSy1 ) galaxy SBS 0846 + 513 ( z = 0.585 ) . This includes multiband fl ux variations, γ -ray spectral analysis, ...
  • Broadband X-Ray Spectral Analysis of the ULX NGC 1313 X-1 Using JeTCAF: Origin of the ULX Bubble 
    Palit, Biswaraj; Mondal, Santanu (IOP Publishing, 2023-05)
    NGC 1313 X-1 is a mysterious ultraluminous X-ray (ULX) source whose X-ray-powering mechanism and bubblelike structure surrounding the source are topics of intense study. Here, we perform an X-ray spectroscopic study of the ...
  • The broken lane of a type II radio burst caused by collision of a coronal shock with a flare current sheet 
    Gao, Guannan; Wang, Min; Wu, Ning; Lin, Jun; Ebenezer, E; Tan, Baolin (Springer, 2016-11)
    We investigated a peculiar metric type II solar radio burst with a broken lane structure that was observed on November 13, 2012. In addition to the radio data, we also studied the data in other wavelengths. The bursts were ...
  • Building a large affordable optical-NIR telescope (I): an alternate way to handle segmented primary mirror 
    Dharmadhikari, Radhika; Parihar, P; Jacob, A (Springer Nature, 2023-12)
    The use of innovative ideas and the latest technology have undoubtedly brought down telescope costs substantially. However, there are still ways to further reduce the cost of optical ground-based telescopes and make them ...
  • Buildings as Weapons of Mass Destruction 
    Bilham, R; Gaur, V. K (American Association for the Advancement of Science, 2013-08)
    A quarter of the world's population inhabits the nations of Iran, Afghanistan, Pakistan, India, Nepal, Bhutan, Bangladesh, Sri Lanka, and Myanmar. These countries lie on or near the northern edge of the Arabian and Indian ...
  • Bulge-Disk Evolution in Interacting Bulgeless Galaxies 
    Mousumi Das; Ramya, S; Sengupta, C; Mishra, K (Astronomical Society of the Pacific, 2013-10)
    Bulgeless galaxies are an extreme class of late type spiral galaxies that have practically no bulge and are nearly pure disk in morphology. Their lack of evolution is a puzzle for theories of galaxy formation and the secular ...
  • A butterfly diagram and carrington maps for century-long Ca II K spectroheliograms from the Kodaikanal Observatory 
    Chatterjee, Subhamoy; Banerjee, D; Ravindra, B (IOP Publishing, 2016-08-10)
    The century-long (1907–2007) Ca II K spectroheliograms from the Kodaikanal Solar Observatory (KSO) are calibrated, processed, and analyzed to follow the evolution of the bright on-disc structures called plages, possible ...
  • BV photometry and H-alpha spectroscopy of the RS Canum Venaticorum binary V711 Tauri 
    Mohin, S; Raveendran, A. V (European Southern Observatory, 1993-08)
    Differential BV photometry of V711 Tau obtained on a total of 120 nights during the years 1984-1991 and H-alpha spectroscopy obtained on 14 nights during the 1990-1991 observing season are presented. We find that the mean ...
  • BV photometry and Hα spectroscopy of the RS Canum Venaticorum binary UX Arietis. 
    Raveendran, A. V; Mohin, S (EDP Sciences, 1995-09)
    We present differential BV photometry of UX Ari obtained on 76 nights during 1989-94 and Hα spectroscopy obtained on 14 nights during the 1990-91 observing season. The migration of the phase of light minimum indicates a ...
  • BV Photometry and Hα Spectroscopy of the Rs-Canum Binary II-Pegasi 
    Mohin, S; Raveendran, A. V (European Southern Observatory, 1993-09)
    Differential BV photometry of II Peg obtained on a total of 57 nights during the years 1986-1991 and Hα spectroscopy obtained on 12 nights during the 1990-1991 observing season are presented. From an analysis of the available ...
  • BV photometry of UX ARIETIS 
    Mohin, S; Raveendran, A. V (Indian Academy of Sciences, 1989-03)
    Differential BV photometry of UX Ari obtained on 58 nights during 1984-1985, 1985-1986, 1986-1987, and 1987-1988 observing season is presented. It is found that (B-V) is phase dependent, with the system being reddest at ...
  • BVR photometry of a newly identified RS CVn binary star HD 61396 
    Barway, Sudhanshu; Pandey, S. K; Parihar, P. S (Elsevier, 2004-12)
    BVR photometry of a recently identified RS CVn binary star HD 61396, carried out during 2001, is presented. The new photometry reveal significant evolution in the shape and amplitude of light curve when compared with those ...
  • BVRI photometry of a few `unidentified' IRAS sources 
    Iyengar, K. V. K; Parthasarathy, M (EDP Sciences, 1997-01)
    We selected 33 unidentified IRAS sources based on the following criteria: i) galactic latitude more than 2 deg, ii) have flux density higher than 1 Jy at 12 microns, iii) have good fluxes at 12, 25, and 60 microns with ...
  • BVRI photometry of the Dipper Asterism region in M 67 
    Anupama, G. C; Kembhavi, A. K; Prabhu, T. P; Singh, K. P; Bhat, P. N (European Southern Observatory, 1995-02)
    We present Cousins BVRI magnitudes for stars in the M 67 `dipper asterism' region, based on observations carried out at the prime focus of the 2.3 m Vainu Bappu Telescope of the Vainu Bappu Observatory, Kavalur. The ...
  • BVRI polarimetry of carbon stars 
    Raveendran, A. V (European Southern Observatory, 1991-03)
    BVRI polarimetry of carbon stars belonging to different variability types - VX And, UU Aur, T Cae, Y CVn, U Hya, Y Hya, RY Mon, W Ori, Y Per, RT Pup, and X Vel - is presented. Though there is significant scatter, on the ...
  • BVRIJHK photometry of post-AGB candidates 
    Fujii, T; Nakada, Y; Parthasarathy, M (E D P Sciences, 2002-04)
    BVRIJHK photometric observations are presented for 27 post-AGB candidates. Almost all objects show a double peaked SED curve in the optical to far-infrared wavelengths. Seventeen objects were classified as post-AGB stars ...
  • BVRIJHK photometry of post-AGB candidates: evolution of post-AGB central stars 
    Fujii, T; Nakada, Y; Parthasarathy, M (Kluwer Academic Publishers, 2001-08)
    Post-AGB stars are generally believed to be on their way to the planetary nebula stage. However, there has been a question about the evolutionary path for the low-mass ones. We present BVRIJHK photometry of post-AGB ...

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