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  • Obscured and powerful AGN and starburst activities at z ~ 3.5 
    Polletta, M; Omont, A; Berta, S; Bergeron, J; Stalin, C. S; Petitjean, P; Giorgetti, M; Trinchieri, G; Srianand, R; McCracken, H. J; Pei, Y; Dannerbauer, H (EDP Sciences, 2008-12)
    Aims. Short phases of coeval powerful starburst and AGN activity during the lifetimes of the most massive galaxies are predicted by various models of galaxy formation and evolution. In spite of their recurrence and high ...
  • Observability of Coronal Heating Processes 
    Venkatakrishnan, P (Kluwer Academic Publishers, 1996)
    The mechanisms that could possibly heat the corona are briefly reviewed with emphasis on their observability. Observing enhanced wave flux at footpoints of active regions would confirm wave heating. Observation of nonthermal ...
  • Observation and characterization of extra-solar planets using Indian facilities 
    Chakrabarty, Aritra (Indian Institute of Astrophysics, 2020-09)
    Detection and characterization of extra-solar planets (also known as exoplanets) is an emerging field that has been constantly evolving with the advent of new cutting-edge observational techniques and the development of ...
  • Observation of a magnetic sub-storm event in the equatorial thermosphere - suggestions for interpretation 
    Saha, S. K (Indian Association for the Cultivation of Science, 2001)
  • Observation of Alfven Waves in an ICME-HSS Interaction Region 
    Dhamane, Omkar; Raghav, Anil; Shaikh, Zubair; Panchal, Utsav; Ghag, Kalpesh; Tari, Prathmesh; Choraghe, Komal; Bhaskar, Ankush; Telloni, Daniele; Mishra, Wageesh (Springer, 2023-03)
    The Alfvén wave (AW) is the most common fluctuation present within the solar wind emitted from the Sun. Whether or not AWs can originate after the collision of an Interplanetary Coronal Mass Ejection (ICME) and a High-Speed ...
  • Observation of an H-alpha outburst in the Be star HR 4123 
    Ghosh, K. K; Apparao, K. M. V; Tarafdar, S. P (American Astronomical Society, 1989-09)
    During routine monitoring of the Be star HR 4123 during the year 1987-1988, a burst of H-alpha emission was observed on May 11, 1987. The increase was observed on May 9 and lasted until June 7, peaking to an equivalent ...
  • Observation of hard X-ray emission from extragalactic sources 3C 273 and NGC 5506 in 20-200 keV band 
    Manchanda, R. K (Astronomical Society of India, 2001)
    We report spectral measurements of the bright QSO 3C273 and the AGN source NGC 5506 made during a balloon flight experiment using high sensitivity scintillation counter telescope LASE, operating in the 20-200 keV energy ...
  • Observation of Intensity Oscillations in Corona during the Total Solar Eclipse of October 24, 1995 
    Singh, J (Indian Institute of Astrophysics, Bangalore, 1997)
    An experiment to search for short-period oscillations in the solar corona was conducted during the total solar eclipse of 1995 October 24 at Kalpi, India. The intensity in the continuum, centred around 5500 Armsrong and ...
  • Observation of R-Band Variability of L Dwarfs 
    Maiti, M; Sengupta, S; Parihar, P. S; Anupama, G. C (University of Chicago Press, 2005-02)
    We report, for the first time, photometric variability of L dwarfs in the R band. Out of three L1 dwarfs (2MASS 1300+19, 2MASS 1439+19, and 2MASS 1658+70) observed, we have detected R-band variability in 2MASS 1300+19 and ...
  • Observation of second cyclotron line feature in the spectrum of Her X-1 
    Manchanda, R. K (Astronomical Society of India, 2001)
    Hard X-ray spectrum of Her X-1 was measured during a balloon flight experiment launched on March 30, 1997 using a large area scintillation counter telescope. The instrument code named LASE, operates in the 20-200 keV energy ...
  • The observation of Sun-spot: (a note read on the 24th March 1920) 
    Chakrabartty, K. N (Astronomical Society of India, 1918)
  • Observation of the lunar eclipse 
    Bose, P. C (Astronomical Society of India, 1913-04)
  • Observation of the Transit of Mercury, 7th November 1914 
    Pocock, R. J (Astronomical Society of India, 1914)
  • Observation of Total Solar Eclipse of October 24, 1995 
    Hiei, K; Inoue, K; Takahashi, N; Fukushima, H (Indian Institute of Astrophysics, Bangalore, 1997)
    K-corona and E-corona were observed at Dundlodh in India. Coronal image, processed by a computer, shows polar plumes in north- and south-pole and streamers at east- and west-limb.
  • Observation of X-ray binary Cygnus X-3 by Indian X-ray Astronomy Experiment 
    Singh, N. S; Singh, K. Y; Naik, S; Paul, B; Agrawal, P. C (Astronomical Society of India, 2001)
    The X-ray binary Cygnus X-3 was observed with the Indian X-ray Astronomy Experiment (IXAE) on Board the Indian Remote Sensing Satellite IRS-P3 during July 3-13, 1999 and October 11-24, 1999 with total useful exposure time ...
  • Observation of α Centauri 
    Jacob, W. S (Royal Astronomical Society, 1856-11)
  • Observational Aspects Of Core Collapse Supernovae 
    Gurugubelli, Uday Kumar (Indian Institute of Astrophysics, 2010-11)
    The discovery of several bright supernovae (SNe) in recent years has evoked a great deal of interest in these objects. The study of these objects are of importance not only as probes to the end stages of stellar evolution, ...
  • Observational evidence of optical variability in L dwarfs 
    Maiti, M (The American Astronomical Society, 2007-04)
    The results of quasi-simultaneous continuous monitoring of six L dwarfs in the R and I bands are presented. A careful analysis of the data shows that the object 2MASSW J0036+1821 is variable in the I and R bands. The ...
  • Observational Evidence Points at AGB Stars as Possible Progenitors of CEMP-s and CEMP-r/s Stars 
    Meenakshi, P; Goswami, A (IOP Publishing, 2021-11-20)
    The origin of enhanced abundance of heavy elements observed in the surface chemical composition of carbonenhanced metal-poor (CEMP) stars still remains poorly understood. Here, we present detailed abundance analysis of ...
  • Observational Properties of a Bright Type lax SN 2018cni and a Faint Type Iax SN 2020kyg 
    Singh, Mridweeka; Sahu, D. K; Dastidar, Raya; Barna, Barnabas; Misra, Kuntal; Gangopadhyay, Anjasha; Howell, D. Andrew; Jha, Saurabh W.; Im, Hyobin; Taggart, Kirsty; Andrews, Jennifer; Hiramatsu, Daichi; Teja, Rishabh Singh; Pellegrino, Craig; Foley, Ryan J.; Joshi, Arti; Anupama, G. C; Bostroem, K. Azalee; Burke, Jamison; Camacho-Neves, Yssavo; Dutta, Anirban; Kwok, Lindsey A.; McCully, Curtis; Pan, Yen-Chen; Siebert, Matt; Srivastav, Shubham; Szalai, Tamás; Swift, Jonathan J.; Yang, Grace; Zhou, Henry; DiLullo, Nico; Scheer, Jackson (American Astronomical Society, 2023-08-10)
    We present the optical photometric and spectroscopic analysis of two Type Iax supernovae (SNe), 2018cni and 2020kyg. SN 2018cni is a bright Type Iax SN (MV,peak = −17.81 ± 0.21 mag), whereas SN 2020kyg (MV,peak = −14.52 ± ...

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