UV astronomy in the post GALEX era Noah

UV astronomy in the post. GALEX era Noah Brosch Wise Observatory Tel Aviv University Israel VLST workshop; STSc. I February 2004 1

Missions described l TAUVEX on GSAT-4 l Israeli l mission on Indian geo-sat (2005/6) UVIT on ASTROSAT l UV/optical imagers on multi-spectral astronomy mission of India (2007/8) l WSO/UV l International large space telescope for UV astronomy (2008+) VLST workshop; STSc. I February 2004 2

GSAT-4 and TAUVEX l l l TAUVEX: from SRG to GSAT-4 Mode changed from pointed observations to sky scans Three-telescope array: 20 -cm & 1 degree FOV, four filters/telescope VLST workshop; STSc. I February 2004 3

The GSAT-4 satellite The GSAT-4 Spacecraft is an Experimental Technology Demonstrator for Advanced Satellite Communication Systems. TAUVEX is its only scientific payload VLST workshop; STSc. I February 2004 4

TAUVEX on GSAT-4 consists of: l l Ka-Band Regenerative and Bent Pipe transponder Geostationary Navigation Payload Scientific Payload (TAUVEX) Bus System experiments VLST workshop; STSc. I February 2004 5

TAUVEX on GSAT-4 l l l TAUVEX on rotating platform Constant-declination scans Dedicated highspeed telemetry link (always available) VLST workshop; STSc. I February 2004 6

Expected performance • Assume low straylight (best case) • Performance with SF-2 (210+/-20 nm) for different spectral types • Lines for monochromatic mag. 17, 18, 19, 20, 21 star VLST workshop; STSc. I February 2004 7

ASTROSAT is an Indian-national scientific satellite to be launched in 2007. Polar orbit (sun-synchronous) offers long integrations only in CVZ. Operation to be targeted to interesting sources. VLST workshop; STSc. I February 2004 8

UVIT to operate in conjunction with the X-ray telescopes VLST workshop; STSc. I February 2004 9

World Space Observatory/UV WSO/UV: 1. 7 -meter telescope at 2 nd Lagrangian point. Its mission: high spectral resolution UV spectroscopy, combined with high-angular-resolution imaging. Image quality: 80% enclosed energy= 0”. 35@633 nm & 0”. 07@122 nm Main instruments: 2 x. HIRES (R=55000) +one long slit R~1000 spectrograph. http: //wso. vilspa. es VLST workshop; STSc. I February 2004 10

WSO/UV: imaging focal plane Six imaging devices: four for UV and two for optical. Wide field=5 arcmin @ 0”. 15/pixel (f/10); high resolution=1 arcmin FOV @ 0”. 03/pixel (f/50). Integral filter wheels (six filters+empty position per camera) VLST workshop; STSc. I February 2004 11

When will WSO/UV happen? T 170 M telescope @ Lavotchkin VLST workshop; STSc. I February 2004 12