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CIBER: Launched! February 25, 2009 at 3:45 am

CIBER: Launched! February 25, 2009 at 3:45 am. The First Galaxies, Quasars, and Gamma-Ray Bursts Ian Sullivan June 10, 2010. CIBER Collaboration. James Bock Viktor Hristov Andrew Lange Louis Levenson Peter Mason Ian Sullivan Michael Zemcov. Asantha Cooray. Brian Keating

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CIBER: Launched! February 25, 2009 at 3:45 am

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  1. CIBER: Launched! February 25, 2009 at 3:45 am The First Galaxies, Quasars, and Gamma-Ray Bursts Ian Sullivan June 10, 2010

  2. CIBER Collaboration James Bock Viktor Hristov Andrew Lange Louis Levenson Peter Mason Ian Sullivan Michael Zemcov AsanthaCooray Brian Keating Tom Renbarger Toshio Matsumoto Shuji Matsuura Kohji Tsumura Takehiko Wada DaeHee Lee Uk Won Nam

  3. Formation of structure and galaxies

  4. Numerical Simulation of Reionization Around z~10, UV radiation from the first stars and proto-galaxies caused the intergalactic medium of neutral Hydrogen to become ionized. Current predictions are that these stars had mass M=30-300Msun z=9 z=8 Trac & Cen 2007 z=7 z=6 Orange regions are ionized

  5. How can you detect the first stars?

  6. Has the light from the first stars been detected? The diffuse background (yellow) appears much brighter than the sum of resolved galaxies (blue) TeV blazar absorption spectra set an upper limit on the EGB, but estimates of this limit vary

  7. CIBER: The Cosmic Infrared Background Experiment Dual wide-field Imagers λ= 1.0, 1.6 μm λ/Δλ=2 2ox 2o FOV 7” pixels. Low-Resolution Spectrometer λ= 0.7 - 1.8 μm. λ/Δλ=20 6o x 6o FOV 80” pixels Narrow-Band Spectrometer λ= 0.8542 μm (Ca II) λ/Δλ=1000 8ox 8o FOV 120” pixels

  8. Focal Plane Assemblies Bi-stable cold shutter The shutter is actuated by two electromagnets Detector Plunger Active thermal control stage Each assembly is thermally isolated from the optics, and strapped to the LN2 tank with copper braid

  9. Nose cone with parachute Guidance system and gas reservoir Telemetry Star tracker Experiment cryostat Payload shutter door

  10. CIBER’s flight • Apogee is strongly sensitive to payload mass; CIBER achieved 335km with a 1060lb payload. • Total flight time was 15 minutes, including 6 minutes of observations • We observed 4 cosmological fields, 2 foreground assessment fields, and the star Vega for calibration of the NBS • The cosmological fields are chosen to enjoy exceptional ancillary coverage to minimize point source contamination.

  11. Imagers Measuring fluctuations in the near-Infrared Background

  12. Imagers: Fluctuations in the Near-Infrared Background Sources from reionization should have a distinct spatial power spectrum However, local galaxies dominate until they are removed to a low level Science window

  13. Low-Resolution Spectrometer (LRS) Measuring the absolute brightness of the near-Infrared Background

  14. LRS: The absolute brightness of the Near Infrared Background The LRS will be the first instrument to span the entire 0.7 – 1.8 µm range Low-Resolution Spectrometer sensitivity after 50s

  15. Zodiacal Light spectrum with the LRS • By itself, the LRS measures the shape of the spectrum of the Zodiacal Light • Absolute calibration can be further improved in the future with the NBS Tsumura et al 2010

  16. Narrow-Band Spectrometer (NBS) Measuring the absolute brightness of the Zodiacal Light λ 2 λ 1 Narrow-band filter λ 0

  17. l=8532-8536nm NBS: Absolute brightness of the Zodiacal Light l=8536-8540nm • NBS design uses a narrow band filter tuned to a reflected CaII solar line to measure absolute intensity of ZL in each field. • The wavelength across the array varies as o = i cos  l=8540-8544nm

  18. Modifications All hardware modifications are complete for the second flight. These include: • New fixed baffles with Laser Black • Extended radiation shield above front plate • New shutter door black liner • All instruments moved inboard ¼” • Pop-up baffles for all instruments • New calibration lamp for the NBS • Strengthened suspension

  19. Five more flights to come: • July 2010 • February 2011 • July 2011 – four-stage non-recoverable flight • Summer 2013 – first flight of CIBER2 • Spring 2014 CIBER2

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