2023 Sep. 1 

Nagoya University

goal of the Workshop

Subaru HSC is a wide-field imaging instrument that has been in operation since 2014 and has been used by many researchers worldwide through the Subaru strategic and open-use programs. In the Deep layer of the HSC survey, deep photometric data in five broadband filters (g,r, i,z, Y) and several narrow-band filters have been obtained over 25 square degrees.

The Euclid satellite was launched in July 2023, and deep imaging observations, including Roman and LSST, will follow. One of the primary scientific goals of these visible and near-infrared imaging surveys is precise measurements of cosmological parameters based on weak gravitational lensing effects. Accurate distance measurements to galaxies are essential for weak lensing analysis, and photometric redshifts have been widely used for this purpose, but their estimation accuracy needs to be improved.

An HSC Deep survey with medium-band filters will provide a unique data set to calibrate the estimation of photometric redshifts. While not as accurate as spectroscopic observations, it can accurately estimate redshifts to galaxies fainter than spectroscopic observations. Therefore, the Subaru HSC medium-band survey will be a remarkably unique dataset for future deep imaging surveys.

In addition to the photometric redshift calibration, this data set is also expected to be of great value in many other fields, such as galaxy evolution and large-scale structure analysis. This workshop aims to learn about the various experiences of our predecessors in the medium-band and narrow-band observations and to discuss the sciences that can be achieved with the HSC medium-band survey.

Registration

Registration is free, and will be closed on Aug. 18 at 24:00 (JST)

https://forms.gle/VEATGnfdUJ7D1SJd7

For remote participants, please register to the zoom too.

https://us02web.zoom.us/meeting/register/tZYrfuitpz0uGNM8AECUy2haYypK43E9y1GR

Confirmed Invited Speaker

Peter Behroozi (Arizona/ NAOJ)

Yuichi Harikane (Tokyo)

Hendrik Hildebrandt (Ruhr)

Akio Inoue (Waseda)

Benjamin Joachimi (UCL)

Tadayuki Kodama (Tohoku)

Dan Masters (Caltech/IPAC)

Pablo G. Pérez-González (CSIC)

Masauiki Tanaka (NAOJ)

Federico Tarsitano (Geneva)

Atsushi Taruya (Kyoto)

David Schlegel (LBNL)

Program

List of Participants

Venue

Nagoya University, Higashiyama Campus, ES635 (6th floor of the ES building, C2-4 in the campus map)

Organizer

Atsushi J. Nishizawa (Gifu Shotoku Gakuen/Nagoya),  Hironao Miyatake (Nagoya),  Maxime Paillassa(Nagoya),  Keitaro Ishikawa (Nagoya),  Shintaro Hayashi (Nagoya)

International Leading Research "Comprehensive understanding of the formation history of structures in the Universe" 

Kobayashi Maskawa Institute (KMI), Nagoya University