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On the origin of near-infrared extragalactic background light anisotropy
Zemcov, Michael,Smidt, Joseph,Arai, Toshiaki,Bock, James,Cooray, Asantha,Gong, Yan,Kim, Min Gyu,Korngut, Phillip,Lam, Anson,Lee, Dae Hee,Matsumoto, Toshio,Matsuura, Shuji,Nam, Uk Won,Roudier, Gael,Tsu American Association for the Advancement of Scienc 2014 Science Vol.346 No.6210
<P><B>A diffuse cosmic glow is not primordial</B></P><P>A cumulative map of all photons ever emitted by any star or galaxy is a highly desirable historical record of the universe's evolution. For this reason, cosmologists have sought to measure this diffuse distribution of light: the extragalactic background light. Zemcov <I>et al.</I> sent up a rocket to measure the fluctuations in this faint background and found largescale fluctuations greater than known galaxies alone should produce (see the Perspective by Moseley). Stars tidally stripped from their host galaxies are the most likely culprit, rather than unknown primordial galaxies.</P><P><I>Science</I>, this issue p. 732; see also p. 696</P><P>Extragalactic background light (EBL) anisotropy traces variations in the total production of photons over cosmic history and may contain faint, extended components missed in galaxy point-source surveys. Infrared EBL fluctuations have been attributed to primordial galaxies and black holes at the epoch of reionization (EOR) or, alternately, intrahalo light (IHL) from stars tidally stripped from their parent galaxies at low redshift. We report new EBL anisotropy measurements from a specialized sounding rocket experiment at 1.1 and 1.6 micrometers. The observed fluctuations exceed the amplitude from known galaxy populations, are inconsistent with EOR galaxies and black holes, and are largely explained by IHL emission. The measured fluctuations are associated with an EBL intensity that is comparable to the background from known galaxies measured through number counts and therefore a substantial contribution to the energy contained in photons in the cosmos.</P>
Analysis of Dark Data of the PICNIC IR Arrays in the CIBER
이대희,김민규,M. Zemcov,남욱원,J. Bock,J. Battle,V. Hristov,T. Renbarger,T. Matsumoto,I. Sullivan,L. R. Levenson,P. Mason,김건희,K. Tsumura,S. Matsuura 한국우주과학회 2010 Journal of Astronomy and Space Sciences Vol.27 No.4
We have measured and analyzed the dark data of two PICNIC IR arrays (P574 and P560) obtained through the Cosmic Infrared Background ExpeRiment (CIBER). First, we identified three types of bad pixels: the cold, the hot, and the transient, which are figured in total as 0.06% for P574 and 0.19% for P560. Then, after the bad pixels were masked, we determined the dark noise to be 20.5 ± 0.05 e- and 16.1 ± 0.05 e-, and the dark current to be 0.6 ± 0.05 e-/sec and 0.7 ± 0.05 e-/sec for P574 and P560, respectively. Finally, we discussed glitches and readout modes for a future mission.
Lee, D.H.,Nam, U.W.,Kim, G.H.,Pak, S.,Zemcov, M.,Bock, J.J.,Battle, J.,Sullivan, I.,Mason, P.,Tsumura, K.,Matsumoto, T.,Matsuura, S.,Renbarger, T.,Keating, B. 한국천문학회 2007 天文學論叢 Vol.22 No.4
The international cooperation project CIBER (Cosmic Infrared Background ExpeRiment) is a rocket-borne instrument, of which the scientific goal is to measure the cosmic near-infrared extra-galactic background to search for signatures of primordial galaxy formation. CIBER consists of a wide-field two-color camera, a low-resolution absolute spectrometer, and a high-resolution narrow-band imaging spectrometer. Currently, all the subsystems have been built, and the integration, testing, and calibration of the CIBER system are on process for the scheduled launch in June 2008.
OBSERVATIONS OF THE NEAR-INFRARED SPECTRUM OF THE ZODIACAL LIGHT WITH CIBER
Tsumura, K.,Battle, J.,Bock, J.,Cooray, A.,Hristov, V.,Keating, B.,Lee, D. H.,Levenson, L. R.,Mason, P.,Matsumoto, T.,Matsuura, S.,Nam, U. W.,Renbarger, T.,Sullivan, I.,Suzuki, K.,Wada, T.,Zemcov, M. IOP Publishing 2010 The Astrophysical journal Vol.719 No.1