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UV astronomy in the UV astronomy in the post-GALEX erapost-GALEX era

Noah BroschNoah BroschWise ObservatoryWise ObservatoryTel Aviv UniversityTel Aviv University

IsraelIsrael

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Missions describedMissions described

TAUVEX on GSAT-4TAUVEX on GSAT-4 Israeli mission on Indian geo-sat Israeli mission on Indian geo-sat

(2005/6)(2005/6)UVIT on ASTROSATUVIT on ASTROSAT

UV/optical imagers on multi-spectral UV/optical imagers on multi-spectral astronomy mission of India (2007/8)astronomy mission of India (2007/8)

WSO/UVWSO/UV International large space telescopeInternational large space telescope for for

UV astronomy (2008+)UV astronomy (2008+)

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GSAT-4 and TAUVEXGSAT-4 and TAUVEX TAUVEX: from SRG TAUVEX: from SRG

to GSAT-4to GSAT-4 Mode changed Mode changed

from pointed from pointed observations to sky observations to sky scansscans

Three-telescope Three-telescope array: 20-cm & 1 array: 20-cm & 1 degree FOV, four degree FOV, four filters/telescopefilters/telescope

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The GSAT-4 satelliteThe GSAT-4 satellite

The GSAT-4 Spacecraft is an Experimental Technology Demonstrator The GSAT-4 Spacecraft is an Experimental Technology Demonstrator for Advanced Satellite Communication Systems. TAUVEX is its onlyfor Advanced Satellite Communication Systems. TAUVEX is its only scientific payloadscientific payload

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TAUVEX on GSAT-4TAUVEX on GSAT-4

GSAT-4 consists of:GSAT-4 consists of:

Ka-Band Regenerative Ka-Band Regenerative and Bent Pipe and Bent Pipe transponder transponder

Geostationary Geostationary Navigation Payload Navigation Payload

Scientific Payload Scientific Payload (TAUVEX)(TAUVEX)

Bus System Bus System experimentsexperiments

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TAUVEX on GSAT-4TAUVEX on GSAT-4

TAUVEX on rotating TAUVEX on rotating platformplatform

Constant-Constant-declination scansdeclination scans

Dedicated high-Dedicated high-speed telemetry speed telemetry link (always link (always available)available)

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Expected performanceExpected 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

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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.

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UVIT to operate in conjunction with the X-raytelescopes

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World Space World Space Observatory/UVObservatory/UV

WSO/UV: 1.7-meter telescope at 2nd Lagrangian point. Its mission: high spectral resolution UV spectroscopy, combined withhigh-angular-resolution imaging.Image quality: 80% enclosed energy=0”.35@633 nm & 0”.07@122 nm Main instruments: 2xHIRES (R=55000)+one long slit R~1000 spectrograph.

http://wso.vilspa.esa.es

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WSO/UV: imaging focal WSO/UV: imaging focal planeplane

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)

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When will WSO/UV happenWhen will WSO/UV happen??

T170M telescope@ Lavotchkin