Sponsored Projects
DEVELOPMENT AND APPLICATION OF ARTIFICIAL NEURAL NETWORKS TO STELLAR SPECTRA AND TAUVEX DATA at Inter University Center for Astronomy & Astrophysics (IUCAA). Project sponsored by ISRO-RESPOND.
Principal Investigator (PI): Ranjan Gupta (IUCAA).
Junior Research Fellow: Archana Bora (IUCAA/ISRO).
 
Science Objectives: In the recent decade, Artificial Neural Networks (ANN's) have entered the field of astronomical applications due to the increasing demand on the large data bases which are upcoming as a result of new satellite based large surveys. The PI and his group have used ANN's in classification of astronomical spectra in various bands over past decade and would discuss these results as examples of application of this powerful tool. Recently, the group has evolved a scheme using the Principal Component Analysis (PCA) technique to fill up the gaps in stellar spectral libraries which has greatly improved the ANN based classification accuracies. The experience gained by the group will help in the application of ANN to the basic TAUVEX data, i.e. star/galaxy classification of raw images and TAUVEX spectral data.

Presentations
Ranjan Gupta at the TAUVEX Science Meeting (March 2006) [pdf::931KB]

Student Projects
More than 40 students, most of them on a short-term basis, either are or were involved in projects with TAUVEX. Some of the topics are presented below.

• DEVELOPMENT OF VIDEO-CAMERA BASED ULTRA-VIOLET DETECTOR SYSTEM Summer student project 2007, by Ashok Ajoy. (BITS, Pilani)
  [pdf::3.7MB]
   
  
• PREDICTION OF SPECTRAL TYPE AND ESTIMATION OF GALACTIC EXTINCTION OF STARS. Summer student project 2006, by Varada V.N. (University of Mumbai, Maharashtra)
  [pdf::246KB]  [latex, zip archive 136KB]  [latex, tar.gz 130KB]
   
  
• EXTRACTING STARS FROM SKY IMAGES: APPLICATIONS TO TAUVEX/ASTROSAT. An 8th Semester Project (2005) by Sindhu Ravishankar, Sneader Sequiera, Sourav Basu and Varun Sarin (PES Institute of Technology, Bangalore).
  [ppt::319KB]
   
  
• QSOS AND THEIR DETECTION USING TAUVEX FILTERS. summer student project 2005, by Veena S. Parvathi (University of Calicut, Kerala).
  [report: pdf::201 KB]  [data: zip::427 KB]  [data: tar.gz::427 KB]
   
  
• ADDITION OF NEW FEATURES IN ASTROJ, AN ANALYSIS PACKAGE FOR ASTRONOMICAL VISUALIZATIONS. K.R. Seena.