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Browsing IIAP Publications by Title

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  • Photometric and radial velocity variations of RCrB near maximum light 
    Raveendran, A. V; Ashoka, B. N; Kameswara Rao, N (D. Reidel Publishing Co, 1986)
    Fourier analysis of the light curves of R CrB in the V band near maximum shows that in addition to several significant short periods there is a modulation of the visual light with a period around 1170 days, similar to that ...
  • Photometric and spectroscopic evolution of supernova SN 2009an: another case of a transitional Type Ia event 
    Sahu, D. K; Anupama, G. C; Anto, P (Oxford University Press on behalf of the Royal Astronomical Society, 2013-04-01)
    We present optical UBVRI photometry and medium-resolution spectroscopy of a transitional Type Ia supernova, SN 2009an, over the period −6 to +150 d from the B maximum. With a Δm15(B) = 1.514 ± 0.132, SN 2009an declines ...
  • Photometric and spectroscopic evolution of the peculiar Type IIn SN 2012ab 
    Gangopadhyay, A; Turatto, Massimo; Benetti, Stefano; Misra, K; Brajesh Kumar; Cappellaro, Enrico; Pastorello, Andrea; Tomasella, Lina; Vanni, Sabrina; Fiore, Achille; Morales-Garoffolo, A; Elias-Rosa, Nancy; Singh, Mridweeka; Dastidar, R; Ochner, Paolo; Tartaglia, Leonardo; Brijesh Kumar; Pandey, S. B (Oxford University Press on behalf of the Royal Astronomical Society, 2020-11)
    We present an extensive (∼1200 d) photometric and spectroscopic monitoring of the Type IIn supernova (SN) 2012ab. After a rapid initial rise leading to a bright maximum (MR = −19.39 mag), the light curves show a plateau ...
  • Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et 
    Sahu, D. K; Anupama, G. C; Srividya, S; Muneer, S (Blackwell Publishing, 2006-09)
    We present optical photometry and spectroscopy of the Type IIP supernova SN 2004et that occurred in the nearby galaxy NGC 6946. The observations span a time range of 8–541 d after explosion. The late time bolometric ...
  • Photometric and spectroscopic evolution of type II-P supernova SN 2004A 
    Gurugubelli, U. K; Sahu, D. K; Anupama, G. C; Chakradhari, N. K (Astronomical Society of India, 2008-09)
    We present optical photometry and spectroscopy of the normal type IIP supernova SN2004A, which was discovered in the galaxy NGC 6207 on 2004 January 9.84UT. Early observations indicated that the supernova was discovered ...
  • Photometric and spectroscopic studies of star-forming regions within Wolf–Rayet galaxies 
    Karthick, M. C; Lopez-Sanchez, A. R; Sahu, D. K; Sanwal, B. B; Bisht, S (Oxford University Press on behalf of the Royal Astronomical Society, 2014-03-21)
    We present a study of the properties of star-forming regions within a sample of seven Wolf–Rayet (WR) galaxies. We analyse their morphologies, colours, star-formation rates (SFRs), metallicities and stellar populations, ...
  • Photometric and spectroscopic study of a highly reddened type Ia supernova SN 2003hx in NGC 2076 
    Misra, K; Sahu, D. K; Anupama, G. C; Pandey, K (Royal Astronomical Society, 2008-09)
    We present UBVRI CCD photometry and optical spectra of the type Ia supernova SN 2003hx which appeared in the galaxy NGC 2076, obtained till ∼ 146 d after the epoch of B-band maximum. The supernova reached at maximum ...
  • Photometric and spectroscopic study of candidate Be stars in the Magellanic Clouds 
    Paul, K. T; Subramaniam, A; Mathew, B; Mennickent, R. E; Sabogal, B (Cambridge University Press, 2011-07)
    Mennickent et al. (2002) presented a catalogue of 1056 Be star candidates in the Small Magellanic cloud (SMC) by studying light curve variation using OGLE II data base. They classified these Be star candidates of the SMC ...
  • Photometric calibration of the CCD camera of 1-m telescope at VBO 
    Mayya, Y. D (Indian Academy of Sciences, 1991-12)
    Calibration of the CCD camera of the 1-m telescope at the Vainu Bappu Observatory, Kavalur, to the BVR system is reported here based on the observations of stars in the 'dipper asterism' in the open cluster M 67 (NGC 2682). ...
  • Photometric distances to dark clouds: cometary globule CG 12 
    Maheswar, G; Manoj, P; Bhatt, H. C (Royal Astronomical Society, 2004-12)
    A method for determining distances to dark clouds and Bok globules based on broad-band optical and near-infrared photometry is presented. In this method, intrinsic colour indices of stars projected towards the direction ...
  • Photometric distances to nine dark globules 
    Maheswar, G; Bhatt, H. C (Blackwell Publishing, 2006-07)
    Distances to nine dark globules are determined by a method using optical (VRI) and near-infrared (near-IR) (JHK) photometry of stars projected towards the field containing the globules. In this method, we compute intrinsic ...
  • Photometric elements, absolute dimensions and evolutionary status of the eclipsing binary HU Tauri (HR 1471) 
    Parthasarathy, M; Sarma, M. B. K; Vivekananda, Rao P (The European Southern Observatory, 1995-05)
    The photometric elements of HU Tauri are derived from an analysis of its blue and visual light curves using the Wilson & Devinney (1971) light curve synthesis method. The photometric elements suggest that HU Tauri is a ...
  • Photometric identification of compact galaxies, stars, and quasars using multiple neural networks 
    Chaini, Siddharth; Bagul, Atharva; Deshpande, Anish; Gondkar, Rishi; Sharma, Kaushal; Vivek, M; Kembhavi, Ajit (Oxford University Press on behalf of Royal Astronomical Society, 2023-01)
    We present MargNet, a deep learning-based classifier for identifying stars, quasars, and compact galaxies using photometric parameters and images from the Sloan Digital Sky Survey Data Release 16 catalogue. MargNet consists ...
  • Photometric identification of objects from Galaxy Evolution Explorer Survey and Sloan Digital Sky Survey 
    Preethi, K; Gudennavar, S. B; Bubbly, S. G; Murthy, J; Brosch, N (Oxford University Press on behalf of the Royal Astronomical Society, 2014-01-01)
    We have used Galaxy Evolution Explorer (GALEX) and Sloan Digital Sky Survey (SDSS) observations to extract seven band photometric magnitudes for over 80 000 objects in the vicinity of the North Galactic Pole. Although these ...
  • Photometric metallicity map of the large magellanic cloud 
    Choudhury, Samyaday; Subramaniam, A; Cole, A. A (Oxford University Press on behalf of the Royal Astronomical Society, 2016-01)
    We have estimated a metallicity map of the Large Magellanic Cloud (LMC) using the Mag- ellanic Cloud Photometric Survey (MCPS) and Optical Gravitational Lensing Experiment (OGLE III) photometric data. This is a first of ...
  • Photometric metallicity map of the Small Magellanic Cloud 
    Choudhury, S; Subramaniam, A; Cole, A. A; Sohn, Y. J (Oxford University Press on behalf of the Royal Astronomical Society, 2018-04)
    We have created an estimated metallicity map of the Small Magellanic Cloud (SMC) using the Magellanic Cloud Photometric Survey (MCPS) and Optical Gravitational Lensing Experiment (OGLE III) photometric data. This is a first ...
  • Photometric observations of solar corona during total solar eclipse of October 24, 1995 
    Kumar, S. S; Sharma, P; Devgun, C. B (Indian Institute of Astrophysics, Bangalore, 1997)
    Twenty pictures of solar corona were taken on October 24, 1995 from Bhind on the central line of totality, covering a wide range of exposure times a 500mm telephoto lens captured Images on 35mm film duly calibrated. This ...
  • Photometric Observations of the X-Ray Dwarf Nova HL Canis Majoris 
    Seetha, S; Marar, T. M. K; Sharma, D. P; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C (INSDOC, 1983-08)
    High speed optical photometric observations of the X-ray dwarf nova HL Canis Majoris (1E 0643-1648), discovered with the Einstein Observatory, are presented. Results of long term monitoring and attempts to detect photometric ...
  • Photometric study of distant open clusters in the second quadrant: NGC 7245, King 9, King 13 and IC 166 
    Subramaniam, A; Bhatt, B. C (Blackwell Publishing, 2007-05)
    We present a UBV CCD photometric study of four open clusters, NGC 7245, King 9, IC 166 and King 13, located between l = 90° and 135°. All are embedded in a rich Galactic field. NGC 7245 and King 9 are close together in the ...
  • Photometric study of distant open clusters in the second quadrant: NGC 7245, King 9, King 13 and IC 166 
    Subramaniam, A; Bhatt, B. C (Royal Astronomical Society, 2007-04)
    We present a UBV CCD photometric study of four open clusters, NGC 7245, King 9, IC 166 and King 13, located between l = 90° and 135°. All are embedded in a rich Galactic field. NGC 7245 and King 9 are close together in the ...

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