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Spectroscopy of the spatially-extended Lya emission around a QSO at z=6.4
Tomotsugu Goto, Yousuke Utsumi, Jeremy R. Walsh +3
We have taken a deep, moderate-resolution Keck/Deimos spectra of QSO, CFHQS2329, at z=6.4. At the wavelength of Lya, the spectrum shows a spatially-extended component, which is sig…
The First Systematic Survey for Lyman Alpha Emitters at z=7.3 with Red-sensitive Subaru/Suprime-Cam
Takatoshi Shibuya, Nobunari Kashikawa, Kazuaki Ota +5
We have performed deep imaging surveys for LyA emitters (LAEs) at redshift ~7.3 in two blank fields, the Subaru Deep Field (SDF) and the Subaru/XMM-Newton Deep survey Field (SXDF),…
The Hubble Space Telescope Cluster Supernova Survey: VI. The Volumetric Type Ia Supernova Rate
K. Barbary, G. Aldering, R. Amanullah +40
We present a measurement of the volumetric Type Ia supernova (SN Ia) rate out to z ~ 1.6 from the Hubble Space Telescope Cluster Supernova Survey. In observations spanning 189 orbi…
Completing the Census of Ly-alpha Emitters at the Reionization Epoch
Nobunari Kashikawa, Kazuhiro Shimasaku, Yuichi Matsuda +16
We carried out extended spectroscopic confirmations of Ly-alpha emitters (LAEs) at z=6.5 and 5.7 in the Subaru Deep Field. Now, the total number of spectroscopically confirmed LAEs…
Grisms Developed for FOCAS
Noboru Ebizuka, Koji S. Kawabata, Keiko Oka +6
Faint Object Camera and Spectrograph (FOCAS) is a versatile common-use optical instrument for the 8.2m Subaru Telescope, offering imaging and spectroscopic observations. FOCAS empl…
A Gunn-Peterson test with a QSO at z=6.4
Tomotsugu Goto, Yousuke Utsumi, Takashi Hattori +2
Understanding the cosmic re-ionization is one of the key goals of the modern observational cosmology. High redshift QSO spectra can be used as background light sources to measure a…