KAGRA SCIENTIFIC CONGRESS: COLLABORATORS’ INFORMATION EXCHANGE

2018/12/01

KSC Newsletter
Issue 3

Four Mirrors are ready, Cryogenic payloads completed,
X-arm commissioning has started, and … and … and …
As scheduled, so-far.
We are managing to join LIGO/Virgo’s observation run 3 (O3), which
will start in the end of March 2019 (the delay was announced, Nov 141)
and will take scientific data at least for one year continuously. We keep
our original plan of DRFPMI (RSE) 2 and also have a backup plan of FPMI 3(see the previous KSC newsletter). If our schedule is kept, we expect tojoin the latter half of O3 with RSE.
At the face-to-face meeting at Toyama in August, system engineering
office (SEO) announced more details installation plan: whether we switch
to the backup plan will be examined at the three checking points, the endof September, December 2018 and March 2019. In order to get betterscientific contribution, everyone is working hard with full efforts.
Fortunately, installations are
so-far going as scheduled. For
Oct 19, the first lock of green laser for
example, all the input optic
10 sec [klog 06624].
systems were successfully
locked (September, 2018), all
the optics of photon calibrator at X-end was completed (October),the first lock of green laser in X-arm (October 19), the last
installation of cryogenic payload (Nov 9), and so on.
Thecommissioning of the X-arm is now ongoing.
Some of ourcelebrating pictures are in the next page. Be happy in 2019!
Contents of this issue
p-2 We did it!
p-3 Directions: KSC in the KAGRA organization chart
p-4 Public Outreach, Kamioka Local
p-6 Meetings: F2F at Toyama, F2F at NAOJ, KIW5 at Perugia
p-8 Poster Award Winners
p-9 Newly Joined: UNIST
p-10 We hear that …
p-11 The Laureates
p-13 We found that …
Photo by Y. Obayashi, Nov 27.
1 https://www.ligo.org/scientists/GWEMalerts.php
2 DRFPMI (RSE) = dual-recycled Fabry-Perot-Michelson interferometer (resonant sideband extraction)
3 FPMI = Fabry-Perot-Michelson interferometer

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KAGRA Scientific Congress Newsletter No. 3

2018/12/01(Right) Photon Calibrator X-end installation completed.
July 25. [JGW-G1809009]
In photo, Takaaki Yokozawa, Yuki Inoue,
Takahiro Yamamoto, and Chihiro Kozakai.

(Left) Installed the BRT part on the TMS-VIS in
the EXT chamber at the X-end! [klog 06342].
In photo, Fumihiro Uraguchi, Koji Nagano, KunihikoHasegawa, Kenta Tanaka, Naoki Kita, and Tomotada
Akutsu.

We did it! in 2018
(Right) SR3 Installation, July 20. [klog 05569]
Panwei Huang, Naoatsu Hirata, Terrence Tsang,
Fabian Peña, Mark Barton, Ryohei Kozu, andEnzo Tapia. (plus Guiguo observing)(Above) OMC installation succeeded, October 18.
[klog 06612]
In photo, Sotatsu Otabe, Kohei Kusayanagi,
Hiraku Sasaki, and Kentaro Somiya.
(Right) Nov. 9, the last installation ofcryogenic payload was completed. The photo at Yfront was distributed in [kagra 02500].
In photo, Masahiro Takahashi, Takayuki Tomaru and
Sakae Araki.

Editors thank Takaaki Yokozawa for his suggestions of photos.🍏

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2018/12/01

Directions

KSC in the KAGRA organization chart
KSC finally placed parallel with EO. Data Analysis groups started under KSC.
As a part of preparations for joint observation with LIGO/Virgo, we need to assign persons who are in
charge for exchanging our activities with theirs, and also to set up our organization how we share suchinformation. KSC was established three years ago as a decision making body on our science, and is regarded tolead this joint collaboration. In this direction, a couple of important agreements were made at Face-to-Face(F2F) meeting August.
First is the placement of KSC in KAGRA organization chart, which had not fixed formally for three years. As
was proposed by Kajita-san, KSC is now located in parallel with EO under PI. This means that the collaboration
itself is now totally responsible for promoting science and also for mapping future strategies.
Second is the re-organization of data analysis groups in order to match with those of LIGO and Virgo.
Former data analysis and data managing groups under SEO are now re-established under KSC, and their
headquarter is named “Data Analysis Committee” (DAC) with the chair Hideyuki Tagoshi. Under DAC, five subcommittees (Compact Binary Coalescence, Continuous Wave, Burst Wave, Stochastic Wave, Computing &Software) and two alias groups 4 (Detector Characterization, Calibration) are formulated. Members of data
analysis groups are participating with a “Research Unit” in order to clarify responsible person of each group forjoint collaboration.
Third is the reinforcement of the KSC board. Responding to a request to tighten international collaboration
in KAGRA, and also for performing in various directions more actively, KSC board includes three more members
from three regions (China, Korea, Taiwan) with one-year (renewable) appointment.
As a result, the current KSC organization chart is as follows.
)
2/ 72
(
0 28 72
1 7

PI
EO

sharing information & idea

SEO

0 /

(

* Hisaaki Shinkai* Chunglee Kim
Sadakazu Haino
Yuta Michimura
Nobuyuki Kanda

KSC board

Data Analysis
Committee (DAC)

Takahiro Yamamoto
Koji Nagano
Zong-Hong Zhu
Hyung-Won Lee
Ray-Kuang Lee

Collaborator-list
ManagerInternational
Cooperation WG* Hideyuki Tagoshi
Sachiko Kuroyanagi
Rie Kikuchi

Tadayuki Tomaru
Nobuyuki Kanda
Hisaaki Shinkai
Hyung-Won Lee
Zhong-Hong Zhu
Feng-Li Lin
Helios Vocca* Hideyuki Tagoshi+ WGs chairs/vice chairs+ Hisaaki Shinkai (board)

Author-list
Committee
Compact
BinaryCoalescence* Hideyuki Tagoshi
Kipp Cannon
Hyung-Won Lee
Tjonnie Li

Joint Editorial
board

Continuous
Wave

Burst Wave

* Yousuke Itoh

* Kazuhiro Hayama

Stochastic
Wave

Computing& Software* Guo-Chin Liu* Ken-ichi Ohara
Sachiko Kuroyanagi Kazuki Sakai

Calibration

Detchar

* TBD

* TBD

Yousuke Itoh
Takashi Uchiyama
Feng-Li Lin
Yoichi Aso
Kazuhiro Hayama
John J. Oh

Diversity
Committee

Joint Run Planning
Committee

Joint Meeting

Yousuke Itoh
Shinji Miyoki* TBD

Joint Detection* TBD* Keiko Kokeyama
Joseph M Fedrow
Chunglee Kim
Kazuki Sakai
Hisaaki Shinkai
Hirotaka Yuzurihara

At the KSC telecon on November 19, Yoichi Aso proposed to establish Future Planning Committee and Research& Development Committee for our future plans (Super KAGRA?) and for authorizing R&D respectively. We will
discuss more at the coming F2F meeting at NAOJ. KSC board expects many people to join also to those new
actions.
Hisaaki Shinkai🍏

4 The two groups are also remain under SEO.

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Outreach

KAGRA appeared in many science eventsin the summer and autumn!
Café KAGRA
On August 12 (Sun), Hida city and KAGRA
Observatory jointly held a science talk event “Café
KAGRA” at Hida city’s Kamioka Library. NAOJ’s vicedirector Jun’ichi Watanabe acted master of theCafé. A novelist Ms. Yoko Ogawa, a journalist Ms.
Yuri Aono, and KAGRA Observatory’s director
Masatake Ohashi were invited as guests of the
Café and made relaxing talks about ranging fromthe astronomy and physics to the literature.
Ohashi explained the behind story why we invited
Ms. Ogawa and Aono. Dr. Watanabe told
astronomers can travel the space and time usinglarge telescopes. Ms. Ogawa, then, replied thatnovels are also able to travel the Universe using readers’ imagination.

University of Toyama Science Festival
On September 29 (Sat) and 30 (Sun), Science Festival was held atUniversity of Toyama, Gofuku Campus. On Saturday, Kazuhiro
Yamamoto gave a lecture entitled “Explore the Universe by
Gravitational Wave” as the Faculty of Science’s special lecture. The
audience listened the lecture with deep interests. A lot ofquestions after the talk about gravitational wave physics and eventechnical detail livened up the session.

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Kashiwa Open Campus
Open Campus was held at the University of Tokyo,
Kashiwa Campus in the weekend of October 26 (Fri) and27 (Sat). In two days, around 2000 guests visited theexhibition of the Institute for Cosmic Ray Research.
Our workshop, “Let’s build gravitational wave telescope!”,was held on Friday, and guests tried to built their own
miniature laser interferometer with help of KAGRA
graduate students. The goal of this experiment was tolisten to the music transferred by the interferometers(sounds exciting!).
On Saturday, “Cosmic Café” was held. Young researchers
including Takafumi Ushiba and Kyohei Kawaguchi
talked about their research and researchers’ life.
See ICRR Webpage http://www.icrr.u-tokyo.ac.jp/beta/181028.html (Japanese page only) for details.

Kamioka Local
Underground laboratory opened
to 150 KAGRA fans
KAGRA underground facilities were opened for public on
Saturday, November 17.
This is the fifth of the series of annual public open event
jointly held with Hida City, Hida Academy and KAGRA
Observatory. Since KAGRA is planned to start its fulloperation in the fall of the next year, this year’s open event
was announced as the last opportunity to visit the laboratory
before start operation and highly attracted KAGRA fans’interest. About 150 participants, selected among theapplicants of more than twice of the capacity, were excited tovisit and see KAGRA’s instruments in the center area and the
X-arm tunnel.

Yoshihisa Obayashi 🍏

5KAGRA Scientific Congress Newsletter No. 3
Recent Meeting

2018/12/01

Face-to-Face at U. Toyama, August 24-26

Program: http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2018August
The 20th F2F meeting was held at University of
Toyama as usual as our summer event. We discussed thestatus of phase-2 construction, preparations for joining
the LIGO/Virgo's O3, and other urgent issues. There
were 124 participants, including 21 people fromoverseas. A hundred attended the banquet.
On the day before F2F, data analysis/data managing
groups held a satellite meeting for re-organization of
their structure, while Norikatsu Mio (U Tokyo) gave alecture about gravitational wave for new graduate
students in a separate room.
We had two invited talks: “Gravitational waves andneutron stars” by Hajime Sotani (NAOJ), and “Status of
Virgo” by Raffaele Flaminio (CNRS/LAPP and NAOJ).
Two new institutes joined to the collaboration; NAOJ,
Theoretical Astrophysics group & Ulsan National
Institute of Science and Technology.
We thank LOCs, Yoshiki Moriwaki, Kazuhiro Yamamoto, and U. Toyama members. 🍏

Next Meeting

Face-to-Face at NAOJ, December 5-6

Program: http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/LCGT/Meeting/f2f/2018Dec
The Mitaka Campus was founded in 1924 (Taisho 13) to host theTokyo Astronomical Observatory which was founded in 1888 (Meiji 21)
and was previously hosted in Hongo Campus. Since the foundation, many
telescopes and facilities have been realized and took measurements for
decades. Nowadays, most of the telescopes don’t collect data anymore andare used as museums to tell everyone the history of the astronomical
observatory. However, some features from the time of astronomical
observation are still present in the campus: one example is the low level ofartificial illumination during the night. For that we recommend you all tohave a pocket light to not lose the way!
The campus is easily accessible from Mitaka JR station using bus
number 51 and Musashi-Sakai JR station using bus number 91. You canreach the campus coming from Chofu Keio station and taking the bus lines number 51 and 91 as well. In all the cases thebus stop to look for is “Tenmondai Mae (天文台前)”.
We all look forward to meeting you at the NAOJ Mitaka Campus next week!
Gravitational Wave Project Office members (Matteo Leonardi) 🍏

KAGRA MEETING SCHEDULE
Mark your calendar now for the following meetings.
The 21st KAGRA Face-to-Face meeting at NAOJ Mitaka campus, Tokyo, Dec 5 (Wed) - 6 (Thur), 2018
The 5th KAGRA International Workshop, at Perugia, Italy, Feb. 14 (Thur) – 15 (Fri), 2019
The 1st KAGRA-Virgo-3G detectors Workshop, at Perugia, Italy, Feb. 16 (Sat), 2019New!
The 22nd KAGRA Face-to-Face meeting at ICRR Kashiwa campus, April 19 (Fri)-21 (Sun), 2019.
The 6th KAGRA International Workshop, at Wuhan, China, June 21 (Fri) - 23 (Sun), 2019
The 23rd KAGRA Face-to-Face meeting at Toyama??, August, 2019.
The 24th KAGRA Face-to-Face meeting at somewhere, December, 2019.
call a host univ./institutes
The 7th KAGRA International Workshop, in Taiwan, March, 2020

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Next KIW

Fifth KAGRA International Workshop, Feb. 14-15,
First KAGRA-Virgo-3G Detectors Workshop, Feb. 16
at the University of Perugia, Italy
https://indico.ego-gw.it/event/12/
It is a great pleasure to have the 5th KAGRA International Workshop in Perugia from the 14th to the 15th ofFebruary 2019, and to couple it to the 1st KAGRA-Virgo-3G Detectors Workshop the following day (Feb. 16th).
The workshops will be organized in one of the most beautiful middle-age halls in Perugia, the Sala dei Notari,right in the central square of the town and close to the University of Perugia.
The University of Perugia is one of the oldest (modern) Universities in the world, founded in 1308 with theformal imperial recognition in 1355, when Emperor Charles IV granted Perugia the permanent right to have a
University and to award degrees to students from all nations.
Today, research, education and consulting activities in the various disciplines are organized in 16
departments, with about 23,500 students, 1,100 professors and researchers and 1,000 staff members. The
University offers study programs also in two other Umbrian towns: Assisi and Terni.
On the international level, the University of Perugia remains firmly committed to develop collaborative
relationships with European and non-European Universities, to facilitate and improve international advanced
study opportunities for its students.
In this framework the gravitational wave group founded by prof. Luca Gammaitoni is officially active in
Perugia since the late ‘80s thanks to the INFN. The gravitational wave group of Perugia, led by me since 2012, is
one of the historical groups in Virgo and the proposer group of the 3G detector ET with Dr. Michele Punturo,and since the 2016 is part of the KAGRA collaboration.
We want to thank the Comune di Perugia, the University of Perugia, the INFN (Istituto Nazionale di Fisica
Nucleare di Perugia) and EGO (European Gravitational Observatory) for supporting the organization of these
events.
We will welcome you in Perugia the next February and if you want we could help you to enjoy not only the
fantastic food but also the great historical and artistic sites and the wonderful countryside of the region Umbria.
Helios Vocca🍏

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Poster Award Winners
At the face-to-face meeting in Toyama (page 6), we awarded Mr. Kohei Yamamoto
and Mr. Yoshinori Fujii. Prof. Wei-Tou Ni kindly donated two sets of his edited books
again as the winner's prize. Two received a certification signed by Kajita-san.
Here are the abstracts of the winner's presentations.

”Fruitful Contents” Section

Kohei Yamamoto (ICRR, The Univ. of Tokyo)

The application of Hamiltonian Monte-Carlo to GW Parameter Estimation
We proposed the new method for GW parameter estimation, which is called Hamiltonian Monte Carlo(HMC). Markov Chain Monte Carlo (MCMC) is one way to estimate the GW parameters. The goal of MCMC isto produce data samples which follow a posterior distribution. For now, the most basic kind of MCMC, called
Metropolis-Hastings (MH), is used for our field. While every MCMC sample is generated by random-walk in
MH, HMC uses Hamilton equation to propose the next sample. This orderly process leads to efficient samplings
and a good conversion on the target distribution.
Now I’m writing the code from scratch, and this code is available
for both of MH and HMC. In this code, first, I generate Gaussian
noise from the given PSD. The code secondly injects the GW signal
into the noise and finally produce samples based on each method.
I compared the results of two methods. The number of HMC steps
is 1e5 and the calculation time is 774[sec], and for MH, 1e6 and4620[sec], respectively. HMC shows the great conversion, but MH is
not enough to converge like HMC does even with such numerous
steps. As the future work, I’m going to implement paralleltempering for preventing the steps from being trapped by the local
maxima of the posterior distribution. 🍏”Beautiful Presentation” Section
Yoshinori Fujii (NAOJ)

Fast localization with a heterogeneous network of gravitational wave detectors
We present the expected performance regarding fast sky
localization of coalescing binaries with a network of threegravitational wave detectors having heterogeneous sensitivities, suchas the LIGO-Virgo network. A hierarchical approach can be used inorder to make an effective use of information from the least sensitive
detector. In this approach, the presence of an event seen incoincidence in the two more sensitive detectors triggers a focusedsearch in the data of the third, less sensitive, detector with a lower
signal-to-noise ratio (SNR) threshold. We investigate the benefit forsky localization that can be expected in such an approach, using
simulated data and signals.
We find that as the sensitivity of Virgo approaches one third of the
LIGO one, the accuracy and precision of the localization can be improved by about a factor 3 when Virgo data
are searched with an SNR threshold around 3.5. This hierarchical network also effectively improves the
localization accuracy and precision when SNR threshold for the lower sensitivity detector is set to around thethreshold provided that the BNS range of that the detector is greater than 20% of more sensitive detectors.
Consequently, this hierarchical search will be most useful when adding new less sensitive detectors to the
network, as they are undergoing commissioning.
(photos by Chihiro Kozakai 🍏 )8

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Newly Joined

Ulsan National Institute of Science and Technology (UNIST)
and Center for High Energy Astrophysics (CHEA) at UNIST
Kyujin Kwak, Lupin Chun-Che Lin, and Young-Min Kim
It was our great honor and pleasure that we joined KAGRA Scientific Congress (KSC) in the last F2F
meeting held at Toyama. We enjoyed the meeting a lot. We met and talked to many KSC members and liked theatmosphere of the meeting and friendly colleagues. In particular, we had an opportunity to visit the KAGRA sitewith the help of Hisaaki Shinkai and Takaaki Yokozawa. It was an amazing experience. By seeing the
instruments and the tunnel, we realized that it is really close to detect the first gravitational wave signal with
KAGRA. We are looking forward to it and hopecontributeto it with the collaboration with other KAGRA
참고1 to캠퍼스전경members.
As new members, we would like tointroduce our institute, UNIST and CHEA,
a research center in the department ofphysics at UNIST. UNIST is a young but
rapidly growing university in South Korea.
It was established in 2009 as agovernment funded, research oriented,
science and technology focused university.
As the name indicates, it is located in anindustrial city in Korea named “Ulsan”
which is known as home-city of Hyundai
motor company. Ulsan also hosts Hyundai
heavy industries, one of the largest- 10 shipbuilding companies, and many petroleum refinery companies. A strong motivation
to establish UNIST is tosustain Ulsan, the industrial capital of Korea, with the continuous support of science and technology. Since its
opening in 2009, UNIST has been jumping to a decent size and beginning to gain world-wide reputation.
UNIST has now about 430 faculties and 3300 and 2700 registered undergraduate and graduate students,
respectively. From the very beginning, UNIST pursues globalization. All the lectures are taught in English and
UNIST has been attracting many international students as well as researchers. As of today, the international
community in UNIST reaches more than 400 people. Please visit the UNIST homepage, www.unist.ac.kr for
more information.
Out of the current 11 schools in UNIST, school of natural science (SNS) was established lately in 2014 andhas three departments, physics, mathematics, and chemistry. Physics department has been also growing quickly.
We have now 21 faculties and more than 60 graduate students in our department and we are expecting to growfurther by continuing to hire more faculty members. The research areas in the UNIST physics department focus
on three fields; plasma physics including astrophysical plasmas, soft matter physics including biology-relatedmaterials, and quantum material physics including solid state physics.
CHEA was established in 2016 in the physics department at UNIST as a long-term (7 years), governmentfunded center for fundamental science. National Research Foundation of Korea (NRFK) selects science research
centers (SRCs) for fundamental science very competitively and CHEA is one of selected SRCs. As the nameindicates, CHEA aims to understand high energy astrophysical phenomena by utilizing all the available
methods, theory, observation, and experiment. Among many high energy astrophysical phenomena, CHEA
focuses on those related to (1) clusters of galaxies and (2) compact objects like neutron stars and black holes.
Thus, gravitational wave is an important part of CHEA’s research activities. In fact, two members of CHEA(Profs. Chang-Hwan Lee at Pusan National University and Maurice van Putten at Sejong University) have been
already participating in the KAGRA collaboration before we joined. CHEA is a multi-institute center. While its
headquarter with 5 professors is stationed at UNIST, 6 more professors from 4 different universities also
participate. Please visit the CHEA home page http://sirius.unist.ac.kr/SRC-CHEA/ for more information.

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Among us, Dr. Young-Min Kim has been alreadyworking for the Detector Characterization group in
KAGRA for a while. He is a post-doc at UNIST andreceived his Ph.D with his thesis on the gravitational
wave research under Prof. Chang-Hwan Lee’s supervisionat Pusan National University. Our imminent plan for
KAGRA is to contribute to the DetChar research bycontinuing Dr. Kim’s current activities. Since the last F2F
meeting, we have recruited a graduate student, Mr.
Kihyun Jung at UNIST who will work on the KAGRArelated projects for his Ph.D thesis. In the long term, weplan to work on the data analysis projects by looking into
various waveforms from astrophysical gravitationalsources and applying machine learning algorithms toparameter estimation. Prof. Lupin Lin is an observational
astronomer of high energy (X-ray and gamma-ray) andan expert of timing analysis. Prof. Kyujin Kwak is acomputational astrophysicist working on various
numerical simulations including hydrodynamics. A new
post-doc of CHEA/UNIST, Dr. Ray Kwan-Lok Li, who is amulti-wavelength observer working on compact objects,
will also join KAGRA and participate in our group
activities. 🍏

Picture taken at the KAGRA control room during thevisit to the KAGRA site. From left, Kyujin Kwak, YoungMin Kim, and Lupin Chun-Che Lin.

WE HEAR THAT …
Atsushi Nishizawa (Nagoya U) received the 13th Seitaro Nakamura prize from Soryushi-Shogakukai.
The citation is for his recent paper, "Generalized framework for testing gravity with gravitational-wave
propagation. I. Formulation"（Phys. Rev. D 97, 104037 (2018)).
Yuichiro Sekiguchi (Toho U) received the 12th Yukawa-Kimura
prize from Yukawa Foundation. The citation is for his contributions
to “Numerical-relativity simulation of binary neutron star mergers
with realistic microphysics”.
Masaru Shibata (Max Planck Institute/Yukawa Institute, Kyoto U)
received the 64th Nishina prize from Nishina Memorial Foundation.
The citation is his contribution to "Study of binary neutron starmergers by numerical relativity simulations”.
Atsushi Nishizawa will move to RESCEU (U Tokyo) from KMI(Nagoya U) as an assistant professor from February 2019.
Ayaka Shoda (NAOJ) and Masaki Ando (U Tokyo) had a baby on
September 9. It’s a boy, and was named Kohshiro. (photo)Congratulations!
If you have other news, please notice them to the editors.

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Photo from facebook
with permission.

KAGRA Scientific Congress Newsletter No. 3

2018/12/01

The Laureate

Yuichiro Sekiguchi,
Yukawa-Kimura prize from Yukawa Foundation
Yuichiro Sekiguchi (Toho Univ.) received the 12th Yukawa-Kimura prize from Yukawa Foundation. The citation
is for his contributions to “Numerical-relativity simulation of binary neutron star mergers with realistic
microphysics".
http://www2.yukawa.kyoto-u.ac.jp/~kimurasho.oj/kimurasho/index_e.htm
Yuichiro kindly sent his comments and his explanations of his research to us. Congratulations! 🍏The merger of neutron stars is a phenomena of time-varying strong gravity sothat numerical relativity is essential to understand it. Moreover, thetemperature achieved during the merger exceeds several 10 MeV and copious
neutrinos are emitted from the merger remnant. Therefore, "realistic
microphysics" such as finite-temperature nuclear-matter equations of state
which govern the thermodynamical properties of the neutron star and theneutrino transport processes are also required.
The recipient of the prize developed first in the world a framework for"numerical-relativity with realistic microphysics" in an ingenious manner andperformed 'realistic' simulations of binary neutron star mergers. Based on thisbreakthrough, the recipient and his collaborator made considerable
contributions in clarifying the dynamics of the binary neutron star mergers,
resolving a long-standing problem of the origin of heavy elements, andPhoto from his official webpage.
predicting promising electromagnetic counterparts to gravitational wave fromthe mergers, as well as calculating gravitational waveforms. The highlight ofthe study was marked at GW170817 and the following electromagnetic followup observations: The results are consistent with the modeling based on the numerical-relativity simulation withmicrophysics.
(Yuichiro Sekiguchi 🍏 )The Laureate

Masaru Shibata,
Nishina prize from Nishina Memorial Foundation
Masaru Shibata (Max Planck Institute/Yukawa
Institute, Kyoto Univ.) received the 64th Nishina prize
from Nishina Memorial Foundation. The citation ishis contribution to “Study of binary neutron starmergers by numerical relativity simulations”.
http://www.nishina-mf.or.jp/prize.html
Congratulations!
The editors are waiting to receive a message from
Shibata-san.🍏New Book on GW physics
Masaru Shibata published atextbook with Kotaro Kyutoku,“Sources of Gravitational Wave”
from Asakura Publishing Co., in
August 2018.
ISBN-13: 978-4254138016
220 pages, 3672 yen.
In Japanese.

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The Laureate

Atsushi Nishizawa,
Seitaro Nakamura prize from Soryushi-Shogakukai
Atsushi Nishizawa (Nagoya U) received the 13th Seitaro Nakamura prize from Soryushi-Shogakukai. The
citation is for his recent paper, "Generalized framework for testing gravity with gravitational-wave propagation.
I. Formulation"（Phys. Rev. D 97, 104037 (2018)).
https://www2.yukawa.kyoto-u.ac.jp/~soryushi.shogakukai/
Atsushi kindly sent his comments and his explanations of his research to us. Congratulations! 🍏The direct detections of gravitational waves (GWs) from merging compact
binaries bring forth new opportunities to test gravity in dynamical and strong
regimes. To this end, it is crucial to search for anomalous deviations fromgeneral relativity in a comprehensive and model-independent way, irrespectiveof gravity theories, GW sources, and background spacetimes.
In the paper, we proposed a new universal framework for testing gravity with
GW propagation, based on an effective field theory that can be used as theeffective description of modification of gravity at cosmological scales. Our
framework covers almost all possible modifications on a GW waveform: GW
speed, graviton mass, amplitude damping rate, and possible source term for
GWs. We studied how each effect comes in GW waveform and then performed aparameter estimation analysis, showing how well the detector network (aLIGO,aVIRGO, KAGRA) can constrain the modification of gravity from GW propagation.
After the submission of this paper, the detection of GW170817 was announced
and allowed us to measure GW speed at the level of 10-15, proving how powerful
the propagation test of GWs is.
(Atsushi Nishizwa 🍏 )An issue of GW
in popular magazine

Photo from Nagoya U.
webpage.

New Book on GR, QT, &Cosmology for general readers

December 2018 issue of“Suuri-Kagaku”(Mathematical Sciences) is
focusing Gravitational Wave.
From KAGRA collaboration,
Misao Sasaki, Hisaaki Shinkai,
Masatake Ohashi, andTakahiro Tanaka contributed.
1030 yen, in Japanese.

Hisaaki Shinkai published atextbook for general readers(freshmen level),“Frontiers of Physics:
Relativity, Quantum Theory
and Cosmology” from
Kyoritsu Publishing Co.,
September 2018.
ISBN-13: 978-4320036055
231 pages, 2484 yen.

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WE FOUND THAT …
KAGRA control room appears in TV Anime “Hisone &Masotan” Story 11 (broadcasted in June 2018), briefly.
(info from Osamu Miyakawa)
Editors do not know the story at all, but found that this ispartially a story of self-defense force, and the air force Gifu
base supports it officially. If someone knows how KAGRA
contributes to the story, please explain it to us.
Updates from KAGRAThis screen shot is from youtube, we are not sure this is legally uploaded one.

WE FOUND THAT …
Latest issue of LIGO magazine, Issue 13 (September 2018) has a status
report of KAGRA by Keiko Kokeyama and Yutaro Enomoto.
https://www.ligo.org/magazine/
Don’t miss to check it out.

Next Step Full Lock

W

This picture was taken in Apr. 2018, to celebrate the lock of the first cryogenic Michelson interferometer at KAGRA.

Keiko Kokeyama

hat is KAGRA
working toward?

after its lock loss during the next obseris an assistant professor
in Institute for Cosmic Ray

servation run will be our first observation

Research, University of To-

run. So far, engineering runs had been only

kyo. She worked at the LIGO

in the simple Michelson interferometer

Livingston site from 2011,

but we are in an underground environ-configuration. As with the other interfer-and moved to the KAGRA

ment. Underground, there is no difference

Keiko Kokeyama: Most parts are similar to
the LIGO installation and commissioning,ometers, the locking of the full interferom-site in 2015. Brainwashed by a crazy cat lady in LIGO

between day and night, or between theeter, and the noise hunting will be most

Livingston, she adopted a Louisiana calico cat duringseasons, in terms of the temperature andchallenging. We hope a lot of LIGO andher LLO time. The cat now lives in the KAGRA area.

Virgo experiences will help.

erating interferometer yet, so achieving
the full lock of our interferometer willbe the first step to improved sensitivity. Among all the work toward the fulllock, I am currently on noise budgeting(or noise modeling) and servo design ofthe green lock system. This will hopefully
help quick recovery of the interferometer

humidity. The natural tunnel temperature
is 12 degrees C, and more than 90% rela-

Yutaro Enomoto
Yutaro Enomoto: We don’t have an op-

An essay in popular magazine

vation run.

Keiko Kokeyama: For KAGRA, the next ob-

tive humidity. Actually, the temperature in
the tunnel has been rising since the tunnel

is a PhD student at the
University of Tokyo who
works on interferometer
commissioning at KAGRA
and is a big fan of Star Wars.
He is looking forward to
detecting a new SW event as well as a GW event that
happened a long time ago in a galaxy far, far away.

excavation finished and we started using
electricity. The electric consumption heats
up the space more than 10 degrees C. The
most contributing power consumption are
the clean booth fans. Recently, we had anation-wide torrential rain, and the humidity of the tunnel went up 10~20 % in abouta day. It seemed a large amount of water

In Kyuuri No.10 (July 2018), an essay,“Memory of Prof. Yoji Totsuka”, by
Takaaki Kajita appears.
702 yen, in Japanese.

11

Brief history of KAGRA will appear in
Nature Astronomy, in January 2019.
If you are not an author, you can read it in advanceat [arXiv:1811.08079]. We also submitted a photofor competition of the cover of the issue, which is
the one in page-1 of this newsletter.

We found melon!（from Masatake Ohashi）

Monthly Notice’s website introduces an article by M.H.P. M.
van Putten and M. Della Valle, MNRAS: Letters (2019), 482(1) (DOI: 10.1093/mnrasl/sly166). In the last paragraph,
KAGRA briefly appears:“Gravitational wave astronomy, and eking out the data fromevery detection, will take another step forward next year,
when the Japanese Kamioka Gravitational Wave Detector(KAGRA) comes online.”

https://ras.ac.uk/news-and-press/research-highlights/gravitational-waves-merged-hyper-massive-neutron-star

13

KAGRA Scientific Congress Newsletter No. 3

2018/12/01
Imam Safdar (PhD Student)
Iman Safdar (Graduate Student)
Chia-Wei Yang (Graduate Student)
National Tsing Hua University
Kuo-Chuan Pan (Assistant Prof.)
Tsung Ju Yang (PD)Shu-Rong Wu (Graduate student)
Osaka City University
Sakumi Sandou (B4)
Genki Sugimoto (B4)The Chinese University of Hong Kong
Chun Fung (Isaac) Wong (Graduate Student)
The University of Tokyo, ICRR
Shoichi Oshino (Researcher)
Lucia Trozzo (Researcher)Ulsan National Institute of Science and Technology,
Center for High Energy Astrophysics*
Kyujin Kwak (Assistant Prof.)
Chun-Che (Lupin) Lin (Research Associate)
Young-Min Kim (PD)Kwan Lok Li (PD)Kihyun Jung (Graduate Student)(as of July-November, 2018)

New Collaborators (*= New Groups)
Beijing Normal University
Haoyu Wang (visiting researcher)
Shichao Wu (graduate Student)
Jie No Zheng (graduate Student)
Fukuoka University
Satoshi Eguchi (Assis. Prof.)
Man Leong Chan (PD)
Shota Shibagaki (PD)JAXA Institute of Space and Astronautical Science
Takuya Midooka (Graduate student)
National Astronomical Observatory Japan
Theoretical Astrophysics*
Hajime Sotani (Project Assistant Prof.)
National Central University, Taiwan
Chia Ming Kuo (Associate Prof.)
Harn Fung Pang (Research Assistant)Hsuan Yu Chu (Graduate Student)
Ko-Han Chen (Graduate Student)
National Taiwan Normal University
Zhang Hong (PD)Hong Zhang (PD)If your affiliation address (or email) changes: Contact Ms. Rie Kikuchi (ICRR).
If your group has new members: Contact Ms. Rie Kikuchi (ICRR), and member-list admins Hideyuki Tagoshi(ICRR) and Sachiko Kuroyanagi (Nagoya U.).
If you have a nice photo: Let the KSC Newsletter share them.

KSC board From Aug. 2018 to Aug. 2019:

Zong-Hong Zhu (BNU, China region)
Hyung-Won Lee (Inje U, Korea region)
Ray-Kuang Lee (NTHU, Taiwan region)
Takahiro Yamamoto (ICRR, post-doc)
Koji Nagano (ICRR, student)

Hisaaki Shinkai (OIT, chair)
Chunglee Kim (Ewha Womans U, vice chair)
Sadakazu Haino (Academia Sinica)
Yuta Michimura (U Tokyo)
Nobuyuki Kanda (OCU, EO)

FROM EDITORS
We appreciate many contributors again for this issue.
We are always calling editorial volunteers, and we also want yourposts and/or leaks of information.
Please send your inquiries the current editorial staff.
Hisaaki Shinkai (Osaka Inst. Tech. ). hisaaki.shinkai at oit.ac.jp
Ayaka Shoda (NAOJ) ayaka.shoda at nao.ac.jp
Yoshihisa Obayashi (ICRR) ooba at icrr.u-tokyo.ac.jp
Kentaro Komori (U Tokyo)
komori at granite.phys.s.u-tokyo.ac.jp
We thank Simon Zeidler for proof-reading the draft.
Our dream is still to get the top download counts in JGWdoc.
[JGW-L1808122] (2018/04), [JGW-L1808559] (2018/08)

14

planned configuration(Phase 3)
y-arm

x-arm

input

output