24 citations · 63 across the 10 of their papers we have counts for
11 papers
Daytime turbulence strength profile measurement at Kodaikanal Observatory
Saraswathi Kalyani Subramanian, Sridharan Rengaswamy, Prasanna Gajanan Deshmukh +2
The Indian Institute of Astrophysics (IIA) is developing a Multi-Conjugate Adaptive Optics (MCAO) system for the Kodaikanal Tower Telescope (KTT). In this context, we have measured…
Measurement of isoplanatic angle and turbulence strength profile from H-alpha images of the Sun
Saraswathi Kalyani Subramanian, Sridharan Rengaswamy
Adaptive Optics (AO) systems have become integral for ground-based astronomy. Based on the scientific case, there are various flavours of AO systems. Measuring the turbulence stren…
Image Quality Specification for Solar Telescopes
Saraswathi Kalyani Subramanian, Sridharan Rengaswamy
Modern large ground-based solar telescopes are invariably equipped with adaptive optics systems to enhance the high angular resolution imaging and spectroscopic capabilities in the…
Discovery of an M-type Companion to the Herbig Ae Star V1787 Ori
R. Arun, Blesson Mathew, Sridharan Rengaswamy +4
The intermediate mass Herbig Ae star V1787 Ori is a member of the L1641 star-forming region in the Orion A molecular cloud. We report the detection of an M-type companion to V1787…
Development of image motion compensation system for 1.3 m telescope at Vainu Bappu Observatory
Sreekanth Reddy, Ravinder Kumar Banyal, Sridharan R +2
We developed a tip-tilt system to compensate the turbulence induced image motion for 1.3 m telescope at Vainu Bappu Observatory, Kavalur. The instrument is designed to operate at v…
Design and modeling of a tunable spatial heterodyne spectrometer for emission line studies
Nirmal Kaipachery, Sridharan Rengaswamy, Sripadmanaban Sriram +6
Spatial Heterodyne Spectroscopy (SHS) is a relatively novel interferometric technique similar to the Fourier transform spectroscopy with heritage from the Michelson Interferometer.…
Complex Organic and Inorganic Compounds in Shells of Lithium-rich K Giant Stars
Ramiro de la Reza, Natalia A. Drake, Isa Oliveira +1
Hydrocarbon organic material, as found in the interstellar medium, exists in complex mixtures of aromatic and aliphatic forms. It is considered to be originated from carbon enriche…
Speckle Imaging with VLT/NACO No-AO Mode
Sridharan Rengaswamy, Julien Girard, Willem-Jan de Wit +1
Long-exposure stellar images recorded with large ground-based telescopes are blurred due to the turbulent nature of the atmosphere. The VLT employs active and adaptive optics (AO)…
The 2012 Interferometric Imaging Beauty Contest
Fabien Baron, William D. Cotton, Peter R. Lawson +15
We present the results of the fifth Interferometric Imaging Beauty Contest. The contest consists in blind imaging of test data sets derived from model sources and distributed in th…
Status and new operation modes of the versatile VLT/NACO
Julien H. V. Girard, Markus Kasper, Sascha P. Quanz +14
This paper aims at giving an update on the most versatile adaptive optics fed instrument to date, the well known and successful NACO . Although NACO is only scheduled for about two…
The 2010 Interferometric Imaging Beauty Contest
Fabien Malbet, William Cotton, Gilles Duvert +9
We present the results of the fourth Optical/IR Interferometry Imaging Beauty Contest. The contest consists of blind imaging of test data sets derived from model sources and distri…