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BRITE - Constellation

BRITE - Constellation. BRI ght T arget E xplorer. BRITE-CA2. BRITE-PL2. BRITE-AUSTRIA. BRITE-CA1. UniBRITE. BRITE-PL1. BRITE - AT. BRITE – PL. BRITE - CA. BRITE – Constellation Management. BEST BRITE Executive Science Team. BRITE - AT. BRITE - CA. A. Moffat (U Montreal)

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BRITE - Constellation

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  1. BRITE - Constellation BRIghtTargetExplorer BRITE-CA2 BRITE-PL2 BRITE-AUSTRIA BRITE-CA1 UniBRITE BRITE-PL1 BRITE - AT BRITE – PL BRITE - CA

  2. BRITE – Constellation Management BEST BRITE Executive Science Team BRITE - AT BRITE - CA A. Moffat (U Montreal) S. Rucinski (U Toronto) S. Mochnacki (U Toronto) J. Matthews (UBC) W. Weiss (IfA) M. Breger (IfA) O. Koudelka (IKS/TUG) R. Kuschnig (IfA) BRITE - PL A. Schwarzenberg-Cerny (CAC) P. Orleanski (SRC) A. Pamiatnykh (CAC) A. Pigulski (Wroclaw Univ.) BIAST- BRITE International Advisory Science Team: 22 Members

  3. high precision photometry (~mmag) selected very bright stars (<4 mag) up to 15 primary targets per field (24deg FOV) obtained during >= 15min per orbit (100min) in two wavelength regions (blue-red) long time base observations (180 d/y/field) all sky access including polar regions expected lifetime 2-3 years per satellite BRITE Mission Goals

  4. BRITE Photometry 101min BLUE- RED

  5. BRITE Sky BRITE: BRIghtTargetExplorer

  6. BRITE Target Stars Selection • 42 proposals have been submitted • 13 PI‘s and their teams • Austria (15), Australia (1), • Belgium (2), Bulgaria (1), • Canada (4), Croatia (1), • Germany (6), Iran (1), Poland (2), • Spain (1), Switzerland (1), U.K. (3) and USA (3) • O, B and Be stars, beta Cephei stars, hot Supergiants, • delta Scuti variables, gamma Doradus pulsators, • roAp / CP stars, red Giants , eclipsing binaries and more BRITE CANDIDATE TARGET STAR CATALOG 4979 entries

  7. BRITE - Satellites • nano-satellites • 20cm cube spacecrafts <8kg • 3 axis pointing control • LEO sunsynchronous (polar) orbit • small aperture (3cm) telescopes • wide (24deg) field of view • one instrument is RED sensitive one BLUE

  8. BRITE Orbit and Observing Strategy • Low Earth Orbit (LEO) Sun-Synch - Dawn-Dusk • 820 km, LTDN 6AM (BRITE-AT) • Orbit Period ~ 101min • 15-40min/per orbit per field • 1-3 fields per orbit • 180 days per year • 300 days per year (near pole) Sun

  9. BRITE – Satellite Design

  10. BRITE – Satellite Design BRITEAttitude Determination and Control System the first high performance 3 Axis ADCS for nano-satellites

  11. BRITE-AUT Launch Madras SFL is contracted to launch BRITE-AT Q1-2011

  12. BRITE Instrument - Telescope 5 lens system plus filter & baffle RED design BLUE design for a 24 deg cicular FOV, telecentric low distortion, no vignetting

  13. BRITE Detectors KODAKKA11002 good performance at high (+20C) temperatures low power consumption and reasonable price ReadNoise ~15e rms !

  14. BRITE - Filters

  15. BRITE Point Spread Function BRITE Blue PSF 5 deg offsets 8 pixels diameter – 80 pixels carry signal~30“/pixel

  16. BRITE – Field Of View 30“/pixel 2670 pixel 4000 pixel

  17. (32x32pix) Raster

  18. ROI Rnnn X2 Y2 RnnnB2 RnnnB3 RnnnA2 RnnA1 V pix BW pix RnnnB4 RnnnB1 BW pix H pix Y1 X1 BRITE Onboard Data Processing sections: RnnnB1-4 ... backgrounds RnnnA1-2 ... apertures processed data: for each background median and sigma are calculated + the sum of signals values encompassed in the two apertures a total of 10 values BW ... width of background [pixels]

  19. BRITE Photometric Performance mag(V) mag(V) = 0-> 1.3 sec / 14 exp per min scatter mag(V) = 2-> 8.0 sec / 5 exp per min mag(V) = 4-> 50.0 sec / 1 exp per min

  20. BRITE Science Ops Software Science Data Generation Code IFAResponsibility

  21. BRITE Ground Station(s) • Primary Ground Station: IKS – TU Graz • Additional Locations: UTIAS – Toronto Canada TU Wien IfA Uni Wien CAC Warsaw UBC Vancouver

  22. BRITE-AT Project Timeline • development of the hardware and software • completion of two satellites June 2010 • launch targeted for January 2011 BRITE-PL1 launch late 2011 , BRITE-PL2 end 2012 BRITE-CA1&2 launch late 2012 http://www.brite-constellation.at

  23. http://www.brite-constellation.at

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