1. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE - Constellation BRIght Target Explorer BRITE-AUTBRITE-CAN BRITE-POL

2. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Mission Goals high precision photometry (~mmag) high precision photometry (~mmag) selected very bright stars (<4 mag) selected very bright stars (<4 mag) 15 stars per field minimum (24deg FOV) 15 stars per field minimum (24deg FOV) obtained during at least 15min per orbit (100min) obtained during at least 15min per orbit (100min) in (at least) two wavelength regions (blue-red) in (at least) two wavelength regions (blue-red) long time base observations (180 d/y/field) long time base observations (180 d/y/field) all sky access including polar regions all sky access including polar regions 3 years lifetime per satellite (minimum 2) 3 years lifetime per satellite (minimum 2) 1MByte/day science data (compressed) 1MByte/day science data (compressed)

3. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Photometry 101 min BLUE - RED

4. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Sky BRITE: BRI ght T arget E xplorer

5. BRITE-Constellation Meeting Warzaw Feb 2010 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 BRITE-sky: a target fields evaluations tool

6. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE - Constellation  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

7. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Orbit and Observing Strategy Low Earth Orbit (LEO) Sun-Synch (Dawn-Dusk) 820 km, LTDN 6AM (BRITE_AUT) Orbit Period ~ 101min 15-40min/per orbit per field 1-3 fields per orbit 180-220 days per year 300 days per year (near pole) Sun

8. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE-AUT Launch Madras SFL is contracted to launch BRITE-AUT Q1-2011

9. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Instrument - Telescope 5 lens system plus filter & baffle for a 24 deg cicular FOV, telecentric low distortion, mimimal vignetting RED design BLUE design

10. BRITE-Constellation Meeting Warzaw Feb 2010 good performance at high (+20C) temperatures low power consumption and reasonable price ReadNoise ~15e rms KODAK KA11002 BRITE Detectors

11. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE - Filters

12. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE - Filters

13. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE – Point Spread Function 0.50 +0.3 0.73 +0.2+0.1 ZEMAX Model PSF - 5 deg offsets BRITE Blue -0.1 -0.2-0.3 1.070.830.610.52 intra focalextra focal 0.0 1.29 best focusdesign red: rms scatter in mmag black: CCD distance in [mm]

14. BRITE-Constellation Meeting Warzaw Feb 2010 ZEMAX Model PSF - 7 deg offsets BRITE Red +0.3+0.2+0.10.0-0.1-0.15-0.20 1.311.191.010.56 0.46 0.400.85 design red: rms scatter in mmag black: CCD distance in [mm] BRITE – Point Spread Function

15. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Point Spread Function BRITE Blue PSF 5 deg offsets 8 pixels diameter – 80 pixels carry signal ~30“/pixel

16. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE – Field Of View 2670 pixel 4000 pixel 30“/pixel

17. BRITE-Constellation Meeting Warzaw Feb 2010

18. up to 15 (32x32pixel) ROI/Raster Region of Interest ROI/Raster

19. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Onboard Data Processing processed data: sections: R nnn B1-4... backgrounds R nnn A1-2... apertures for each background median and sigma are calculated + the sum of signals values encompassed in the two apertures a total of 10 values H pix V pix R nnn B4 R nnn B2 R nnn B3 R nnn B1 BW pix ROI R nnn R nn A1 R nnn A2 X1 Y1 Y2 X2 BW... width of background [pixels]

20. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Photometric Performance mag(V) = 0-> 1.3 sec / 14 exp per min mag(V) = 2-> 8.0 sec / 5 exp per min mag(V) = 4-> 50.0 sec / 1 exp per min mag(V) scatter

21. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Operational Software Science Data Generation Code

22. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE Ground Station(s)  Primary Ground Station: IKS – TU Graz  Additional Locations: UTIAS – Toronto Canada TU Wien IfA Uni Wien

23. BRITE-Constellation Meeting Warzaw Feb 2010 BRITE-AUT Project Timeline http://www.brite-constellation.at  development of the hardware and software hardware and software  completion of two satellites June 2010 satellites June 2010  launch targeted for January 2011 January 2011

24. BRITE-Constellation Meeting Warzaw Feb 2010 http://www.brite-constellation.at