Publications (3)0 Total impact
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J. Bock,
I. Sullivan,
T. Arai,
J. Battle,
A. Cooray,
V. Hristov,
B. Keating, M. G. Kim,
A. C. Lam,
D. H. Lee, [......],
T. Matsumoto,
S. Matsuura,
K. Mitchell-Wynne,
U. W. Nam,
T. Renbarger,
J. Smidt,
K. Suzuki,
K. Tsumura,
T. Wada,
M. Zemcov
[show abstract]
[hide abstract]
ABSTRACT: We have developed and characterized an imaging instrument to measure the
spatial properties of the diffuse near-infrared extragalactic background light
in a search for fluctuations from z > 6 galaxies during the epoch of
reionization. The instrument is part of the Cosmic Infrared Background
Experiment (CIBER), designed to observe the extragalactic background light
above the Earth's atmosphere during a suborbital sounding rocket flight. The
imaging instrument incorporates a 2x2 degree field of view, to measure
fluctuations over the predicted peak of the spatial power spectrum at 10
arcminutes, and 7"x7" pixels, to remove lower redshift galaxies to a depth
sufficient to reduce the low-redshift galaxy clustering foreground below
instrumental sensitivity. The imaging instrument employs two cameras with
\Delta \lambda / \lambda ~0.5 bandpasses centered at 1.1 and 1.6 microns to
spectrally discriminate reionization extragalactic background fluctuations from
local foreground fluctuations. CIBER operates at wavelengths where the
electromagnetic spectrum of the reionization extragalactic background is
thought to peak, and complements fluctuations measurements by AKARI and Spitzer
at longer wavelengths. We have characterized the instrument in the laboratory,
including measurements of the sensitivity, flat-field response, stray light
performance, and noise properties. Several modifications were made to the
instrument following a first flight in 2009 February. The instrument performed
to specifications in subsequent flights in 2010 July and 2012 March, and the
scientific data are now being analyzed.
06/2012;
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K Tsumura,
T Arai,
J. Battle,
J. Bock,
S Brown,
A. Cooray,
V. Hristov,
B. Keating, M. G. Kim,
D H Lee, [......],
T Matsumoto,
S Matsuura,
K Murata,
U. W. Nam,
T. Renbarger,
A Smith,
I. Sullivan,
K Suzuki,
T Wada,
M. Zemcov
[show abstract]
[hide abstract]
ABSTRACT: Absolute spectrophotometric measurements of diffuse radiation at 1 \mu m to 2
\mu m are crucial to our understanding of the radiative content of the Universe
from nucleosynthesis since the epoch of reionization, the composition and
structure of the Zodiacal dust cloud in our solar system, and the diffuse
galactic light arising from starlight scattered by interstellar dust. The Low
Resolution Spectrometer (LRS) on the rocket-borne Cosmic Infrared Background
Experiment (CIBER) is a \lambda / \Delta \lambda \sim 15-30 absolute
spectrophotometer designed to make precision measurements of the absolute
near-infrared sky brightness between 0.75 \mu m < \lambda < 2.1 \mu m. This
paper presents the optical, mechanical and electronic design of the LRS, as
well as the ground testing, characterization and calibration measurements
undertaken before flight to verify its performance. The LRS is shown to work to
specifications, achieving the necessary optical and sensitivity performance. We
describe our understanding and control of sources of systematic error for
absolute photometry of the near-infrared extragalactic background light.
12/2011;
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M. Zemcov,
T Arai,
J. Battle,
J. Bock,
A. Cooray,
V. Hristov,
B. Keating, M. G. Kim,
D H Lee,
L. R. Levenson,
P. Mason,
T Matsumoto,
S Matsuura,
U. W. Nam,
T. Renbarger,
I. Sullivan,
K Suzuki,
K Tsumura,
T Wada
[show abstract]
[hide abstract]
ABSTRACT: The Cosmic Infrared Background Experiment (CIBER) is a suite of four
instruments designed to study the near infrared (IR) background light from
above the Earth's atmosphere. The instrument package comprises two imaging
telescopes designed to characterize spatial anisotropy in the extragalactic IR
background caused by cosmological structure during the epoch of reionization, a
low resolution spectrometer to measure the absolute spectrum of the
extragalactic IR background, and a narrow band spectrometer optimized to
measure the absolute brightness of the Zodiacal light foreground. In this paper
we describe the design and characterization of the CIBER payload. The detailed
mechanical, cryogenic, and electrical design of the system are presented,
including all system components common to the four instruments. We present the
methods and equipment used to characterize the instruments before and after
flight, and give a detailed description of CIBER's flight profile and
configurations. CIBER is designed to be recoverable and has flown twice, with
modifications to the payload having been informed by analysis of the first
flight data. All four instruments performed to specifications during the second
flight, and the scientific data from this flight are currently being analyzed.
12/2011;
