Abstract Details

Name: N Kameswar Rao
Affiliation: Indian Institute of Astrophysics
Conference ID: ASI2017_1422
Title : UVIT -- A nnew Tool for the Study of Planetary Nebulae iUV
Authors and Co-Authors : N Kameswar Rao (IIA), Firoza Sutaria (IIA), Rekhesh Mohan (IIA), Jayant Murthy IIA), Gajendra Pandey (IIA), S Muneer (IIA)
Abstract Type : Oral
Abstract Category : Stars,ISM and the Galaxy
Abstract : Ultraviolet imaging telescope (UVIT) is one of the main payloads on the first Indian Astronomical satellite, ASTROSAT, that has been launched on 28th September 2015. UVIT consists of two 38-cm telescopes providing three channels for imaging the sky at an angular resolution of 1 to 1.5 arc sec and a field of 28 arc minutes. One of the telescopes is optimized to FUV (1250 - 1800 Ã…) and the other one has a dichroic mirror that reflects NUV (2000 -3000 Ã…) and transmits optical (3200 -5500 Ã…). Each channel is provided with five filters that isolate spectral regions. The FUV has CaFâ‚‚, BaFâ‚‚, Sapphire and silica and the NUV has broad and narrower filters. The two UV channels have a grating that provides spectra of about 100 resolving power. Mapping of emission lines like C IV 1550Ã… can be achieved by differencing images in two filters. Imaging PNs in few emission lines is one of the main programmes to be carried out. We present the first results obtained of the planetary nebula Helix (NGC 7293) in two FUV and two NUV filters and discuss the implications.