Abstract Details
| Name: B Ananthamoorthy Affiliation: Manipal Centre for Natural Sciences, MAHE Conference ID: ASI2019_248 Title : UVIT and GALEX: A comparative study Authors and Co-Authors : B. Ananthamoorthy, Debbijoy Bhattacharya Abstract Type : Poster Abstract Category : Instrumentation and Techniques Abstract : AstroSat, India's first multi-wavelength satellite is designed to observe the universe in UV and broad X-ray band with its five onboard payloads. Ultraviolet Imaging Telescope (UVIT) onboard Astrosat observes the universe in FUV (130-180 nm), NUV (200-300 nm) and VIS (320-500 nm) with its best resolution of 1.5 arcsec (compared to 5 arcsec of GALEX) till date. Objective of this work is to study the variability of the UV sources and search for any possible new detection. The methodology used in this work which includes the detection of background, setting up a threshold map, detection of the sources, source flux calculation etc. are similar to that used in GALEX catalog preparation with required modification necessary for UVIT. The detection of background and Threshold map is setup using Poisson statistics. SExtractor and PSFex are used for source detection and photometry. The observation of UVIT and GALEX for few similar field of observation are analyzed for source flux variation and possible new source detection by UVIT. The challenges, method adopted and preliminary results obtained with the UVIT and GALEX data are presented here. |