Research Papers: Recent submissions

  • Characteristics of aerosol black carbon mass concentration over a high altitude location in the Central Himalayas from multi-year measurements 
    Dumka, U. C.; Moorthy, K. K.; Kumar, R.; Hegde, P.; Sagar, R.; Pant, P.; Singh, Narendra; Babu, S. S. (2010)
    Multi-year measurements of near surface aerosol black carbon (BC) mass concentration, made from a high altitude station at Manora Peak (29.4° N, 79.5° E, 1958m msl) in the Central Himalayas, using a 7-channel Aethalometer ...
  • Short-term flux and colour variations in low-energy peaked blazars 
    Rani, B., et al.(including Gupta, A. C. and others) (2010)
    We have measured multiband optical flux and colour variations for a sample of 12 low-energy peaked blazars (LBLs) on short, day-to-month, time-scales. Our sample contains six BL Lacertae objects (BL Lacs) and six flat ...
  • The TAOS project: upper bounds on the population of small kuiper belt objects and tests of models of formation and evolution of the outer solar system 
    Bianaco, F. B., et al. (including Mondal, S.) (2010-04)
    We have analyzed the first 3.75 years of data from the Taiwanese American Occultation Survey (TAOS). TAOS monitors bright stars to search for occultations by Kuiper Belt objects (KBOs). This data set comprises 5×10⁵ star ...
  • Evidence of wave harmonics in a brightened magnetic network observed from Hinode/EIS 
    Srivastava, A. K. (2010)
    We study intensity oscillations in the upper chromosphere to search acoustic wave harmonics in a lowatmospheric solar cavity associated with a brightened magnetic network near the south pole of the Sun. We use a wavelet ...
  • The Taiwanese–American occultation survey project stellar variability. ii. detection of 15 variable stars 
    Mondal, S., et al. (2010-05)
    The Taiwanese–American Occultation Survey (TAOS) project has collected more than a billion photometric measurements since 2005 January. These sky survey data—covering timescales from a fraction of a second to a few hundred ...
  • Major surge activity of super-active region NOAA 10484 
    Uddin, W.; Kumar, P.; Srivastava, A. K.; Chandra, R. (2010)
    We observed two surges in Hα from the super-active region NOAA 10484. The first surge was associated with an SF/C4.3 class flare. The second one was a major surge associated with a SF/C3.9 flare. This surge was also ...
  • Multi-wavelength view of flare events on 20 November 2003 
    Kumar, P; Manoharan, P. K.; Uddin, W. (2010)
    We analyze two flare events that occurred in active region NOAA 501 on 20 November 2003. The Hα and magnetogram measurements show interaction between two filaments, which produced a slowly rising flare event, corresponding to ...
  • Network loop oscillations with EIS/Hinode 
    Srivastava, A. K.; Kuridze, D.; Zaqarashvili, T. V.; Dwivedi, B. N.; Rani, B. (2010)
    We analyze a time sequence of He II 256.32 Å images obtained with EIS/Hinode, sampling a small magnetic loop in magnetic network. Wavelet analysis indicates 11-min periodicity close to the loop apex. We interpret this ...
  • Observation of Kink Instability during Small B5.0 Solar Flare on 2007 June 4 
    Srivastava, A. K.; Zaqarashvili, T. V.; Kumar, P.; Khodachenko, M. L. (2010-05-20)
    Using multi-wavelength observations of SOHO/MDI, SOT–Hinode/blue-continuum (4504 Å), G band (4305 Å), Ca ii H (3968 Å), and TRACE 171 Å, we present the observational signature of a highly twisted magnetic loop in AR 10960 ...
  • Places of formation of nineteen nearby classical Cepheild 
    Joshi, U. C. (1982)
    Places of formation of 19 nearby classical Cepheids have been computed in a model of our Galaxy which has axisymmetric and spiral-like components. For the axisymmetric component Schmidt’s (1965) model is used, and spsiral-like ...
  • Surge prominence of 1981 November 19 
    Verma, V. K.; Pande, M. C. (1982)
    Time-lapse photographic observations with 0.7Å passband H-alpha filter and the morphological behaviour of the surge prominence recorded on 1981 November 19 have been described. The surge was recorded both in the ascending ...
  • A multifrequency study of the large radio galaxies 3C46 and 3C452 
    Nandi, S.; Pirya, A.; Pal, S.; Konar, C.; Saikia, D. J.; Singh, M. (2010)
    We present low-frequency observations starting from ~150MHz with the Giant Metrewave Radio Telescope, and high-frequency observations with theVery Large Array of two large radio galaxies 3C46 and 3C452. These observations ...
  • A method to determine distances to molecular clouds using near-IR photometry 
    Maheswar, G.; Lee, C. W.; Bhatt, H. C.; Mallik, S. V.; Dib, S. (2010)
    We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. The method is based on a technique that aids spectral classification of stars lying towards the fields containing ...
  • A multiwavelength study of star formation in the vicinity of galactic H II region Sh2-100 
    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. (2010)
    We present multiwavelength investigation ofmorphology, 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 ...
  • A transit timing analysis of seven RISE light curves of the exoplanet system HAT-P-3 
    Gibson, N. P.; Pollacco, D. L.; Barros, S.; Benn, C.; Christian, D.; Hrudkova, M.; Joshi, Y. C.; Keenan, F. P.; Simpson, E. K.; Skillen, I.; Steele, I. A.; Todd, I. (2010)
    We present seven light curves of the exoplanet systemHAT-P-3, taken as part of a transit timing programme using the rapid imager to search for exoplanets instrument on the Liverpool Telescope. The light curves are analysed ...
  • Franck-Condon factors for some abundant umbral molecules 
    Joshi, G. C.; Joshi, U. C.; Punetha, L. M.; Pande, M. C. (1982)
    Some of molecular transitions in UV in sunspots are pointed out and Franck-Condon factors for some of these have been calculated.
  • The peculiar solar flare of 1981 May 13 
    Bondal, K. R.; Pant, P.; Pande, M. C.; Ballabh, G. M. (1982)
    Time-lapse photographic observations with 0.7 Å passband H-alpha filter and the morphological-cum-temporal behaviour of a large double solar flare which occurred on 1981 May 13 have been described. The two strands, ...
  • Tight constraints on the existence of additional planets around HD 189733 
    Hrudkova, M.; Skillen, I.; Benn, C. R.; Gibson, N. P.; Pollacco, D.; Nesvorny, D.; Augusteijn, T.; Tulloch, S. M.; Joshi, Y. C. (2010)
    We report a transit timing study of the transiting exoplanetary system HD 189733. In total, we observed 10 transits in 2006 and 2008 with the 2.6-m Nordic Optical Telescope, and two transits in 2007 with the 4.2-m William ...
  • Photoelectric flare observations of Gliese 867 B 
    Sanwal, B. B. (1982)
  • Reports on new discoveries 
    Tiwari, S. K.; Chaubey, U. S.; Pandey, C. P. (2009)
    HD 103498 is an A1 type magnetic star having surface magnetic field of about 2.5 kG and shows the lines of Sr, Eu and Cr in its spectrum (Cramer & Maeder, 1980). The Stromgren indices of HD 103498 are b-y = 0.003, m₁=0.196, ...

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