KAGRA SCIENTIFIC CONGRESS: COLLABORATORS’ INFORMATION EXCHANGE

2018/04/01

KSC NewsLetter
The premiere issue

What is this
NewsLetter?

Nobody knows if thisis the first issue of aseries of information
letters, or just a April
fool’s day joke.

Phase-1 operation starts on April 23
First cryogenic interferometer test will start soon.
After two years from the iKAGRA run, we will start phase-1 operation on April 23
to May 6. Due to the tight schedule for our upcoming real observation, systemengineering office (SEO) decided to operate phase-1 with one cryogenic mirror (Yarm), and the other at normal temperature. We do not know what will be theoutcomes. So it might become a sort of fun. A detail list of tests planned during
the run is at page-3.
The above photo, taken in a clean room in the University of Toyama, is our 23kgSapphire mirror for X-end, which is now under installation. The installation of thecryo-payload at X-end is almost done and the main beam is coming back to the

O3=Ozone.

We are in a rush forO3 this year. Let’sfinish looking for O2.

center now 😀 .
Three  words  you  should  not  miss  in  our  conversation.  

1

GW

Find GW.
Here GW is not“Gravitational Wave”,
but “Golden Week”.

2

3

CRYOGENICO3

Not an oxygenallotrope. Not apathogenic Vibrio
Parahaemolyticus.

Buy refrigerator, set
freezing chamber,feel chilly, but try not tocatch a cold.

1

We call forvolunteers

We welcome youreditorial participation
to this journal. It will
give you a career
update definitely.

KSC NEWSLETTER No. 1

2018/04/01

Directions

Towards joining LIGO/Virgo’s O3
In order to ensure a scientific result in our observation run, KAGRA began serious
discussion with LIGO/Virgo for a joint operation plan.
At the face-to-face meeting at Tokyo Inst. of Tech. in December 2017, Takaaki Kajita, our PI, proposed to join
LIGO/Virgo’s O3 (observational run 3) by accelerating our original roadmap. One major reason was that weneed a definite scientific “result” by the end of
FY2019, but according to the original roadmap(see figure), KAGRA operate alone, making
difficult to confirm possible detections. At F2F,
the KSC members understood the importanceand got a fundamental consensus to go.
Since then, SEO has revised, remodeled, andrescheduled the installation plan again andagain and again, and the executive office (EO)
decided to take contact LIGO and Virgocollaboration. Kajita-san sent a letter to LIGO/
Virgo on February 8, and we received theirwarm replies the day after.
When David
Shoemaker, the spokesperson of LIGO, visited
Kyoto for the YKIS conference, Kajita-san and
The original roadmap shown in the “LVK-scenario paper”, arXiv:
some core members had a kick-off meeting with 1304.0670v4 (updated in Sep. 2017) . The distance is thehim. Our data analysis (DAS) group started to maximum achievable observational distance of a GW signal
estimate scientific impacts of joining O3, and coming from neutron star binaries. The new plan is to begin
Hideyuki Tagoshi presented the status of KAGRA KAGRA’s first observation somehow catching up within the O3
at the LVC meeting held in California USA in period, i.e. by the end of summer 2019.
March 2018.
Discussions between KAGRA and LIGO/Virgo are on-going. Our intention is to sign up agreement (MOU) at the
LV meeting in early September in the Netherlands.
Hisaaki Shinkai🍏

RECENT REVIEW TALKS (RELATED TO KAGRA PROJECT)At the ASJ meeting at Chiba Univ. in March 2018, the special session on GW170817 was held. Nobuyuki
Kanda gave a plenary talk on what we know about binary systems from gravitational wave. In the GW
session, Mark Barton gave an overview talk on KAGRA.
At the JPS meeting at Tokyo Univ. of Science in March 2018, the special symposium “Dawn of GW
Astronomy” was held. The organizer was Masaki Ando. Kiwamu Izumi did a talk on the GW detectors,
Yousuke Itoh gave a talk on how we extract information from the GW signal, and Kipp Cannon
described a behind story of GW170817. In the GW session, Takafumi Ushiba gave an overview talk on
KAGRA [JGW-G1808096].
At the LVC meeting at Sonoma Univ. in US in March 2018, Hideyuki Tagoshi gave an overview talk on
KAGRA [JGW-G1808094-v4].
At the first annual symposium of the innovative area “Gravitational Wave Physics and Astronomy:
Genesis” at ICRR in March 2018, Masatake Ohashi gave a (personal) overview talk on KAGRA.

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2018/04/01
Kamioka

New Office is Open!
Opening ceremony was held with the mayor of
Hida-city, and local residents.

Hokubu-kaikan (Left building) was renovatedfor KAGRA.

Our new office, Hokubu-kaikan, is now available next to the dataanalysis building at Kamioka. The opening ceremony was held on
March 2 with many guests, including Hida-city mayor Mr. Tsuduku,
and people living in the Mozumi.

The building was originally used as a public hall andnursery school. Since 2012, we are using a part of thebuilding at the first floor. Though the data-analysis
building was newly built next to Hokubu-kaikan in 2014,
it was not big enough due to the increasing number ofpeople working at KAGRA site. Then, in 2017, we started
to renovate the unused part of the building for staffs andstudents. Now we have a new refresh room and a meeting
room, as well as office rooms. Note that this renovation
was supported by the donation of the University of Tokyo
Foundation to KAGRA project.
Ayaka Shoda🍏
Memorial photo at the opening ceremony.

Projects

A few details of Phase-1 operation
The table shows the plan as of March 28. The schedule may be changed. We do not call non-expert shift forthis operation. Asterisk (*) in the table means that it starts after the day-time tests finished.

bKAGRA  phase-‐‑‒1  operation  :  List  of  experiments    (as  of  March  28)Day  (9am-‐‑‒5pm)
OLG  measurements  Night  (5pm-‐‑‒9am  next  day)cont.

Type-‐‑‒A  Yend  TRF

cont.

25 WedBS  TRF  CW  injection  26 ThuType-‐‑‒A  Xend  TRF

cont.

27 Fri

Noise  injection  Center  CBC  injection  28 SatNoise  injection  Yend

*CBC  injection  Schnupp  Asymmetry,  IFO  noise  budget

cont.

Noise  injection  Xend*OLG  measurements  CRY  extra-‐‑‒exp.1  (w  interferometer)

cont.

April  23 Mon
24 Tue29 Sun30 MonMay  1 Tue
2 Wed
3 Thu

automatic  operation

4 Fri
5 Sat
6 Sun

CRY  extra-‐‑‒exp.2  (w/o  interferometer)

7 Mon

phase-2 starts

cont.

3

Parallel

Data  transfer,  Pipeline,  GIF

KSC NEWSLETTER No. 1

2018/04/01

Upcoming Meetings

Ewha Womans Univ.
Introducing the host university of the next
KAGRA International Workshop (KIW),
June 29-30, 2018.
It is a great pleasure to hold the 4th KAGRAInternational Workshop at Ewha Womans University(梨花女子大学, 이화여자대학교) in Seoul, Korea. We
are also very happy to have Kajita-san’s public talkduring the workshop. We would like to thank KASI
(Korea Astronomy and Space Science Institute) andNRF (National Research Foundation of Korea) for
financial support.
Ewha is the oldest and largest all-female university
in Korea (founded in 1886). About 15,000
undergraduates and 6,000 graduate students are
currently enrolled at Ewha. Transportation to Ewha
is very convenient from both Incheon and Gimpo
international airports. The nearest subway station is"Ewha Womans University (이대)" station on a green
line (line no. 2). The campus is in a central regionof Seoul, called Sinchon (新村, 신촌): it is one of thelargest college towns in Seoul. Many eateries, cafes,
and "fashion" streets are within walking distancesfrom Ewha.

Shinkai-san (Osaka Inst. Tech.) says, “When I was a
postdoc, I had a chance to stay at Ewha for a month.
Prof. Sung-won Kim is an expert of wormholes, and I
and Sean Hayward, who was a lecturer at that timeat Ewha, worked together for dynamical evolution of
wormhole. Sung-won organizes workshops andconferences frequently, so I visited Ewha several
times, including for the last year’s ICGAC-XIII (The13th International Conference on Gravitation,
Astrophysics, and Cosmology)”.
Ewha is so close to many attractions in Seoul and wehope you can find some time to explore the city. Just
one caution: Korean Monsoon may begin in June.
Please bring an umbrella!
Chunglee Kim🍏

Upcoming Meetings

Face-2-Face at Osaka
City Univ., May 18-20.

KSC board is trying to organize “the presentation
award” for young researchers. So, don’t miss it.

The details will be announced soon!

KAGRA SITE VISITORS (FEBRUARY-MARCH)

We will meet together again at Osaka after thephase-1 operations. The host persons are Nobuyuki
Kanda & Yousuke Itoh. Osaka City University is
located in front of the Sugimoto-Cho (杉本町)
station of JR Hanwa-line (阪和線), where we canaccess in 12 minutes from Ten’noji (天王寺)terminal. Many hotels are in Ten’noji area.
The meeting is held in three-day style. The invited
speaker from LIGO is Albert Lazzarini. We will callyour contributions both in oral and poster sessions.

Feb 6: SSH Nagano-Suwa-Seiryou high school, 27
students
Feb 7: Nisshin Steel Co., Ltd, 5 persons
Feb 19: Tokyo Univ., Human Resource.
Feb 23: Tohoku Univ., 18 Freshmen of Dept. Physics.
March 2: Ministry of Finance, 13 persons.
March 13: NHK, “Cosmic Front” video taking.
March 20: Iwanami audio-visual media Co.,Ltd.

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KSC NEWSLETTER No. 1
Lab.

2018/04/01

interview

Academia Sinica,
Institute of Physics
Academia Sinica Institute of Physics (中央研究院 物理研究所, AS IoP) is located in the eastside of Taipei city in Taiwan. AS IoP joined
KAGRA collaboration in 2016. The current
members are Sadakazu Haino (Associate
Research Fellow), Yuki Inoue (DistinguishedPost-doc. Fellow), Darkhan Tuyenbayev (Postdoc. Researcher), Yu-Kuang (Cory) Chu(Visiting Master student), and Yun-Jing Huang(Visiting Master student). The main activities
of AS IoP in KAGRA include :1. Developments of Telephoto-camera (Tcam)
and GW Photon-calibrator (Pcal) as
calibration (CAL) subsystem instruments
and commissioning tools.
2. Full KAGRA data mirroring to the Tier1
data center at AS Grid Center (ASGC) as adata management (DMG) task.
3. G P U - a c c e l e r a t e d C B C p a r a m e t e restimation and simulation of various
KAGRA observation cases in collaboration
with TGWG (Taipei Gravitational Wave
Group).
Y. Inoue and S. Haino are the KSC board
members as post-doc. and foreign instituterepresentatives, respectively. AS has hosted the3rd. KIW in May, 2017 with more than 80
participants both from inside and outside
Taiwan.
Sadakazu Haino🍏[interviewer HS] How GW group interacts with other groups in AS IoP?
[Haino] AS IoP consists of various research groups like particle-, nano-, and bio-physics and supporting staffs.
GW group has been newly formed and is having various discussions and support with/from other groups.
[HS] Could you describe a procedure to get a postdoc position in Taiwan?
[Haino] For AS postdoc fellowships, applications are open twice every year (March and August).
Project postdoc researcher positions are always available depending on the funding situation of each project.
[HS] Does AS have a short stay program for grad students, or senior staffs?
[Haino] Yes, for both of them.
[HS] What was the most culture-shocking event to you comparing with the life in Japan?
[Haino] Taiwan is very similar to Japan or even more Japanese-like than Japan (you will feel as in Japan ~20
years ago).
[HS] What does "kagra" mean in Taiwanese?
[Haino] I asked colleagues, but there is no special meaning.
[HS] What KAGRA project means for Taiwan?
[Haino] GW activities are new in Taiwan and by joining KAGRA, which is (fortunately or unfortunately) still
under development, we can learn lots of GW-related research activities

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2018/04/01

Physics

What Stephen Hawking did in Relativity?
One of the pioneering giants in general relativity died at 76 in March 2018.
Steven Hawking, a well-known wheelchair scientist,
passed away March 14. He mentioned sometimes
that he was born on the 300th anniversary of Galileo
Galilei’s death (Jan 8). Since March 14 is the day ofbirth of Albert Einstein, he has one more episode in
his introduction.
Hawking made a lot of revolutions in relativity. In
his PhD thesis, he showed mathematically that acollapsing over-massive star would result in asingularity (a place of infinite matter density andcurvature). The idea was soon developed with Roger
Penrose, and summarized as the singularity
theorems (1970), which denote the appearance of
singularity is general, and big-bang type of
singularity is also inevitable. These theorems
indicate general relativity itself has the limit.
Hawking showed also that the area of black hole’s
horizon (event horizon) is always increasing (1973),
which later connects to the notion of BH’s entropy.
He also showed that BH’s horizon has a topology ofsphere (1973), which is later used as the procedureof showing the uniqueness of Kerr solution, i.e.
stationary BHs can be always expressed with Kerr
metric (in 4-dimensional space-time) which indicatesthe nature is amazingly simple.
He developed the analogy discussion of BH andthermodynamics with Bardeen and Carter, which is
now widely accepted as BH thermodynamics (1973).
What is, then, the “temperature” of a BH? Hawking
considered quantum effects in a rotating BH andconcluded that BHs made black-body radiation,
known as the Hawking radiation today. Radiation
carries out the energy from BH, so that BH will lose
its mass and evaporate itself in the end. This BH
evaporation (1974) was a sensation to researchers,
but it shows BHs are key-objects connecting classicaland quantum theories. If BHs evaporate away, thenwhere are all information captured in BHs going to?
This is called BH information-loss paradox, and stillin debates. Recent battle field is in holographic
principle of string theory and/or definition of blackhole horizon (firewall, fuzzball, no BH, …). At the
JPS meeting this March, I was quite upset whenseveral particle physicists started saying, “BH is aevaporating object without horizon, …”.
In 1980s, Hawking tried to solve the puzzle of bigbang singularity with Hartle by assuming ‘noboundary’ boundary condition. The idea was to workin Euclidean space-time (signature ++++, not like
Riemannian -+++) without cusp, and to accept
imaginary time for the dynamics. We now recognize
this was one of the proposals for interpreting the
beginning of the Universe, although we do not have

The picture from his official page, http://www.hawking.org.uk/
The page describes himself as:
Stephen William Hawking. 1942 - 2018
Cosmologist, space traveller and hero.

other successful models.
Hawking's name became popular after he published
the book, “Brief History of Time” (1988). It wastranslated in more than 40 languages, and sold over
25 million copies. I always use his phrase in mylecture: “Someone told me that each equation I
included in the book would halve the sales. I
therefore resolved not to have any equations at all.
In the end, however, I did put in one equation,
Einstein's famous equation, E = mc2. I hope that thiswill not scare off half of my potential readers”. Thisappears in the acknowledgment but only in the firstedition (though Japanese version still has). Hawking
erased this phrase when the second edition issued in
1998.
For GW researchers like us, we should know that the
maximum limit of GW energy from colliding BHs
was derived by Hawking (1971). The number is29%, which can be obtained simply as the following
inset shows.
Hisaaki Shinkai🍏

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KSC NEWSLETTER No. 1

2018/04/01

WE HEAR THAT …
Hyung Mok Lee moved from Seoul National Univ. to Korea Astronomy and Space Science Institute(KASI) as the president, January 2018.
Chunglee Kim moved to Ewha Womans University from KASI as an assistant professor, March 2018.
Kazuhiro Hayama moved from ICRR to Fukuoka University as a associate professor, April 2018.
Kyohei Kawaguchi moved from AEI to ICRR as an assistant professor, March 2018.
Koh Ueno moved from Univ. Wisconsin–Milwaukee to RESCEU (Univ. Tokyo) as a postdoc, April 2018.
Eleonora Capocasa, after she finished Master in Pisa and PhD in Paris, she joined NAOJ GWPO on Jan.
2018 as a project researcher till Aug., and as a JSPS research fellow after Sept. 2018.
Tatsuya Narikawa, JSPS postdoc, changed his host from ICRR to Kyoto Univ. from April, 2018.
Nami Uchikata moved from ICRR to Niigata Univ. as a postdoc researcher, April, 2018.
Rahul Kumar left KEK and moved to Caltech as a research associate, March 2018.
Kazuki Sakai got doctoral degree with his thesis, “Application of the Hilbert-Huang transformation to
gravitational wave data analysis” (supervised by Hirotaka Takahashi), in February 2018. He is now an
assistant professor at National Institute of Technology, Nagaoka College.
Hirotaka Yuzurihara got doctoral degree with his thesis, “Search for gravitational waves from compact
binary coalescences and correlation analysis of laser interferometer” (supervised by Nobuyuki Kanda,
Osaka City Univ.), in December 2017. He is now a postdoc at ICRR, Kashiwa.
Congratulations! If you have other news, please let the editors know.

KAGRA COLLABORATION ARTICLE
Construction of KAGRA: an Underground Gravitational Wave Observatory
T. Akutsu et al. (KAGRA Collaboration)
Progress of Theoretical and Experimental Physics, Volume 2018, Issue 1, 1 January 2018, 013F01,
https://doi.org/10.1093/ptep/ptx180

SPACE FOR ADS

New Book on GW physics

Seiji Kawamura published a textbook,“Frontiers of Gravitational Wave
Physics” from Kyoritsu Publishing Co.,in March 2018.
ISBN-13: 978-4320035379
186 pages, 292 g, 2160 yen.
In Japanese.
This is the original shot by aphotographer Arthur Sasse.

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KSC NEWSLETTER No. 1

2018/04/01

KAGRA MEETING SCHEDULE IN FY 2018Mark your calendar now for the following meetings. Note that: this is real.
The 19th KAGRA Face-to-Face meeting at Osaka City Univ. May 18 (Fri) –20 (Sun)[The registration will be announced soon in middle April.]
The 4th KAGRA International Workshop, at Ewha Womans Univ., Seoul, Korea, Jun. 29 (Fri) –30 (Sat)The 20th KAGRA Face-to-Face meeting at Toyama Univ. Aug. 24 (Fri) – 26 (Sun)The 21st KAGRA Face-to-Face meeting at somewhere, and sometime in December[We call for the host university/institute.]
The 5th KAGRA International Workshop, at Perugia, Italy, Feb. 14 (Thur) – 16 (Sat), 2019
[We will have a joint session with Virgo.]

You are supposed to …
If your affiliation address (or email) changes: Contact to Ms. Rie Kikuchi (ICRR).
If your group has new members: Contact to Ms. Rie Kikuchi (ICRR), and member-list admins
Hideyuki Tagoshi (ICRR) and Ken’ichi Nakao (Osaka City U.), and also mail to the KSC NewsLetter editors.

If you moved to a new place to KAGRA collaboration: Contact to KSC board. You will be
requested to make an introduction at face-to-face meeting.

If you want to join KAGRA collaboration independently: Contact to KSC board. You aresupposed to have a public interview at face-to-face meeting.

If you have nice photo: Let the KSC NewsLetter share them.

FROM EDITORS
We hope that this newsletter will help the information exchange and will not help you to waist your time
for research. We welcome your feedbacks. We need editorial volunteers, and we want your posts and/or
leaks of information, if there will be the next issue.
planned configuration

Please send your inquiries to current editorial staff.

(under negotiation)

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 (Tokyo Univ.)
komori at granite.phys.s.u-tokyo.ac.jp
We thank Eleonora Capocasa, Matteo Leonardi, andSimon Zeidler for proof-reading the draft.
Our dream is to get the No.1 download-counts in JGWdoc.

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