BRITE-Constellation Nov BRITE Satellites Cubic form factor (20cm/side) with mass < 8kg Cubic form factor (20cm/side) with mass < 8kg Pre-deployed antennas and booms Pre-deployed antennas and booms Telescope (Blue and Red): Telescope (Blue and Red): 11 Megapixel CCD 11 Megapixel CCD Aperture = 3cm Aperture = 3cm FOV = 24  FOV = 24  30 arcsec/pixel 30 arcsec/pixel Three-axis attitude control (≈1.5 arcminute stability) Three-axis attitude control (≈1.5 arcminute stability) UHF and S-Band communication UHF and S-Band communication

BRITE-Constellation Nov BRITE Satellites

BRITE-Constellation Nov BRITE Satellites

BRITE-Constellation Nov BRITE Satellites

BRITE-Constellation Nov. 2010

BRITE Instruments - Telescopes 5 lens system plus filter & baffle 24 deg FOV, telecentric low distortion, minimal vignetting RED design BLUE design

BRITE-Constellation Nov good performance at high (+20C) temperatures low power consumption and reasonable price ReadNoise ~15e rms KODAK KA11002 BRITE Detectors

BRITE-Constellation Nov BRITE - Filters

BRITE-Constellation Nov BRITE – Point Spread Function ZEMAX Model PSF - 5 deg offsets BRITE Blue intra focalextra focal best focusdesign red: rms scatter in mmag black: CCD distance in [mm]

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

BRITE-Constellation Nov BRITE – Field Of View 2670 pixel 4000 pixel 30“/pixel

BRITE-Constellation Nov. 2010

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

BRITE-Constellation Nov BRITE Onboard Data Processing

BRITE-Constellation Nov BRITE Onboard Data Processing processed data: sections: R nnn B backgrounds R nnn A 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]

BRITE-Constellation Nov 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

BRITE-Constellation Nov BRITE Orbit  Low Earth Sun-Synchronous Dawn Dusk Orbit  820 km, LTDN 6am  orbit period ~ 101min UniBRITE and BRITE-AUSTRIA will be launched on the same rocket into: SUN

BRITE-Constellation Nov BRITE Launcher Madras

BRITE-Constellation Nov BRITE Ground Stations  Primary Ground Station: IKS – TU Graz  Additional Locations: UTIAS – Toronto Canada TU Wien IfA Uni Wien Minimum Data Rate 2MB per day

BRITE-Constellation Nov BRITE Target Stars  40 proposals have been submitted  13 PI‘s and their teams Austria (13), 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

BRITE-Constellation Nov BRITE AO-I Overview the first announcement of opportunity was released in Sep 2008 – deadline Nov 2008 an initial review of the proposals was carried out in Dec 2008 proposers were given a chance to supplement their target star lists and assign weights to objects deadline Feb 2009 finally we got 42 proposals with more than 6000 candidate targets

BRITE-Constellation Nov BRITE AO-I Proposals Overview  42 proposals have been submitted  PIs from 13 countries Austria (14), 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 TARGET STAR CATALOG

BRITE-Constellation Nov BRITE Targets Evaluation  weight individual stars in proposals  weight the scientific merit of each proposal  calculate the weighted density of stars accross the sky  select the fields with highest density which are seperate properly in RA  invesigate fields that are observable all year BRITE_sky : BRITE Targets Display and Field Investigation Tool

BRITE-Constellation Nov BRITE Targets Evaluation  four commissioning fields were tentatively selected by BEST in June 2009  criteria were: distribution in RA to cover all seasons real time access to ground stations potential scientifc content cf1 RA= 5.5h DEC= 0.0d (Orion) cf2 RA=10.8h DEC= +11.7d (Leo) cf3 RA=15.9h DEC= 0.0d (Ser) cf4 RA=22.0h DEC= +60.5d (Cep)

BRITE-Constellation Nov BRITE Commissioning Fields  40 proposals have been submitted  13 PI‘s and their teams Austria (13), 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

BRITE-Constellation Nov  maximize output of mission  required 15min observations of one field/orbit  the orbit period will be ~101min  observing one of more fields per orbit  data volume needs to be in check BRITE Observing Strategy

BRITE-Constellation Nov BRITE Observing Strategy Launch Year 1Year 2 comm 2m Field 1 Field 2 Field 3 – all year access Considerations for one pair of (Blue-Red) Satellites ~100min

BRITE-Constellation Nov BRITE Observing Strategy shared orbit observations Star Field 1 Star Field 2

BRITE-Constellation Nov BRITE Observing Strategy 1 orbit (~101min) Star Field 1 Star Field 2

BRITE-Constellation Nov BRITE Project Status  Hardware development to be completed by Dec 2010  Completion of the two satellites in March-2011 satellites in March-2011  Launch is schedule for June 2011