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Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

Now showing items 21-40 of 290

Broad Band Photometry of Solar Corona during the Total Solar Eclipse of October 24, 1995

Bagare, S. P; Aleem, P. S. M; Singh, J; Saxena, A. K (Indian Institute of Astrophysics, Bangalore, 1997)

A 30 cm coelostat, a red broad band filter, and a 15 cm objective providing an f/15 beam were used to obtain high resolution picture is recorded with its top around 2Ro, in the near north polar region. The nearest YOHKOH ...
Broad Band Photometry of the Solar Corona of 1983, June 11

Sivaraman, K. R; Singh, J; Kapoor, R. C; Kariyappa, R (Indian Institute of Astrophysics, Bangalore, 1985-11)

The solar corona was photographed at an effective wavelength of 6300A during the total eclipse of 1983, June 11 at Indonesia. From the isophotes of the corona, the intensity distributions along the equator, poles, streamers ...
Ca II K Emission from the Solar Chromosphere

Sivaraman, K. R (Indian Institute of Astrophysics, Bangalore, 1986)

The role of the Ca II K line as a reliable diagnostic of the chromospheric activity on the Sun is reviewed. The chromospheric structures seen in this line serve as good indicators of the photospheric magnetic structures ...
The cause of the so-called pole effect in the electric arc

Royds, T (Indian Institute of Astrophysics, Bangalore, 1916-12-02)
CCD Observations of the Total Solar Eclipse of October 24, 1995

Verma, V. K; Wahab Uddin; Gaur, V. P; Joshi, G. C; Bondal, K. R (Indian Institute of Astrophysics, Bangalore, 1997)

The observations of the solar corona during the Total Solar Eclipse of October 24, 1995 were attempted in white light and in narrow band filters with peak wavelenghts centered at 5303 Armstrong (FeXIV) and at 6474 Armstrong ...
Colour photography of solar corona during the total solar eclipse of October 24, 1995

Gopalakrishna Reddy, M; Rama Rao, P. V. S; Krishna Rao, D. V (Indian Institute of Astrophysics, Bangalore, 1997)

Very good color pictures of the solar corona of 24th October 1995 were taken by a team from Andra University, from Budge Budge, Calcutta. A total of 36 pictures recorded the various phases of the eclipse from the first to ...
Comoving frame calculations with Lorentz profiles in radially expanding media

Peraiah, A; Raghunath, G (Indian Institute of Astrophysics, 1979-11)

A computationally simple method for solving the line transfer in comoving frame has been described for radially expanding spherical medium. We have assumed a radially increasing velocity distribution and a non-LTE (where ...
Comparison of Experimental and Theoretical Study of Diffuse Reflectance of Highly Scattering Particulate Systems

Shah, H. S; Adroja, D. G; Vaidya, D. B (Indian Institute of Astrophysics, Bangalore, 1991)

Diffuse reflectance of titanium dioxide pigment dispersion is measured in visible region for wavelengths 400(20)700 nm. Kubelka-Munk absorption and scattering coefficients are determined using two constant K-M theory. ...
A comparison of the periodicities in prominences and sunspots

Royds, T (Indian Institute of Astrophysics, Bangalore, 1913-11-13)
Compton Broadening Due To Electron Scattering

Peraiah, A; Srinivasa Rao, M (Indian Institute of Astrophysics, Bangalore, 1993)

We have investigated the effects of Compton broadening due to electron scattering in the hot stellar atmosphere, quasars, AGN's etc. We considered a purely electron scattering media. The Compton effect scattering function ...
A Computer Controlled Microdensitometer

Ananth, A. V (Indian Institute of Astrophysics, Bangalore, 1985-11)

The paper describes an interface as well as appliaction program developed for logging of digital data from a Carl Zeiss Microdensitometer on the TDC-316 Computer. This has been developed to meet certain requirements of ...
Convection and the Phenomenon of Kilogauss Magnetic Fields on the Sun

Venkatakrishnan, P (Indian Institute of Astrophysics, Bangalore, 1984)

The role played by convection in the formation of slender magnetic flux tubes and in the dynamics of the gas within the tube is discussed in the case of simplified models. Convection instability cannot drive systematic ...
Coronal Heating Experiments of the Williams College Group at Mukandgarh Fort, Rajasthan

Pasachoff, J. M; Babcock, B. A; Sebastian Diaz; Reardon, K. P; Kutner, E. R (Indian Institute of Astrophysics, Bangalore, 1997)

We report on the Williams College expedition to Mukandgarh Fort, Rajasthan, for the total solar eclipse of 24 October 1995. The main experiments were a search for 1 Hz oscillations in coronal loops as an indication of ...
Coronal Loops

Krishan, V (Indian Institute of Astrophysics, Bangalore, 1986)

The statistical treatment of the magnetohydrodynamically turbulent plasma is used to study the steady state configuration of the coronal loops. The stability of the plasma system is defined in terms of certain invariants ...
A D. C. Amplifier for Photoelectric Photometry

Raveendran, A. V; Mohin, S (Indian Institute of Astrophysics, Bangalore, 1987)

We describe the construction and discuss the performance of a d.c. amplifier which was installed at the 34-cm telescope of Vainu Bappu Observatory in 1987 January and since then extensively used for variable star photometry.
D3 as a dark line in the solar spectrum

Smith, C. M (Director Kodaikanal Observatory, 1905-08-05)
Details of the expedition to Iradatganj during total solar eclipse of October 24, 1995

Bandyopadhyay, A; Pandey, P; Narayan, A; Biswas, C; Neogy, S (Indian Institute of Astrophysics, Bangalore, 1997)

Equipment: Celestron C-14 Schmidt Cassegrain Telescope (14" diameter), off-axis 6" solar filter, ST6 CCD camera, Off-axis polaroid filter 6" rotatable in steps of 60 degree.
Determination of Linear Polarization of Solar Corona from Observations of the Eclipse of October 24, 1995

Srikanth, R; Sharma, Mangala; Rajaguru, S. P (Indian Institute of Astrophysics, Bangalore, 1997)

Photographs of the Solar Corona were taken using a refractor telescope and polarizer during the Solar Eclipse of October 24, 1995. Two sets of photographs with 0.5 second and 1.0 second exposure, for different orientations, ...
Determination of times of second and third contact from flash spectrum sequence

Bhatnagar, A. K (Indian Institute of Astrophysics, 1997)

The predicted times of contact of a total solar eclipse have uncertainty of a few seconds due to (i) irregular profile of the lunar limb, (ii) difference between the geometrical and gravitational centres of the Moon's disc ...
Development of Polishing Procedure for Producing Highly Specularly Reflecting Surface for Sun Shield Panels of INSAT II TS VHRR Radiant Cooler

Saxena, A. K (Indian Institute of Astrophysics, Bangalore, 1991)

VIRR Radient Cooler used for cooling of infrared detector of VHRR instrument onboard INDIAN NATIONAL SATELLITE [INSAT II] is being developed at Thermal Systems Division of ISAC/ISRO, Bangalore. This development work is ...

Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

Browsing Kodaikanal Observatory Bulletins (1905 - 1997 ) by Title

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