Progress report of
KaVA AGN Science WG

Motoki Kino (Kogakuin Univ), Kazuhiro Hada (NAOJ)
on behalf of KaVA-EAVN AGN Science WG“VERA Users Meting”
Nov 4-5 2017 at NAOJ Mizusawa

Contents
1. Members: from KaVA to EAVN
2. Progress of KaVA Large Program
3. EAVN and EHT campaign in 2017
4. Plan in 2018

From KaVA to EAVN:
the case of KaVA AGN SWG

Kick off at Guiyang, China!

Chinese members in the AGN SWG(2017 Nov)
Zhiqiang Shen (SHAO)
Wu Jiang(SHAO)
Tao An(SHAO)
Lang Cui(XAO)
Yingkang Zhang (SHAO)
Xiaopeng Cheng (SHAO)
Yuzhu Cui(NAOJ)
Guang-Yao Zhao (KASI)KaVA AGN SWG - making a smoothtransition to EAVN AGN SWG
nationality of participants (2017 Oct)JapaneseKorean(+EUs)
ChineseProgress of
KaVA AGN Large Program

Our pilot KaVA observations revealed
superluminal motions in M87

Hada, Park, KaVA AGN SWG et al. (2017), PASJ

Current status of KaVA AGN LP for M87
lKaVA AGN LP is the only one
VLBI monitoring for M87!
lBi-weekly monitoring reveals
velocity field in great details!
(Park et al. in prep)
lQuasi simultaneous 22/43Ghz
enables us to explore spectral
index! (Ro et al. in prep)

Current status of KaVA AGN LP for Sgr A*
l Indeed, the KaVA data quality is very
good because of rich shortbaselines!
l The PI, GY Zhao (KASI), is wrapping
up Sgr A* data in 2014-2015.
l Michael Johnson (Harvard) joins usand supports closure-only analysis.

More results to comeSee details in presentations in recent workshops
http://www.miz.nao.ac.jp/vera/en/content/cc/cc20170117/c1
http://eavw2016.csp.escience.cn/dct/page/70003
http://agn.kasi.re.kr/eatingvlbi/index.html

EAVN and EHT campaign in 2017

Special thanks toOh Sejin san
http://www4.nhk.or.jp/cosmic/23/• NHK TV “Cosmic Front”• EHT, EAVN and KJCC

AGN WG commits KaVA+Tianma array
performance evaluation• !#   •  " #Beyond KaVA-EAVN: EATING VLBI!
(East Asia To Italy: Nearly Global VLBI)EAVN-2017 also detected transcontinental fringes to Italy!

Italy-VERA experiment in April/2016200-200
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Channels
ChannelsLower frame: Ampl Jy Top frame: Phas deg
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Timerange: 00/08:20:45 to 00/08:20:53

Plan in 2018

Large Program in 2nd term submitted

Also plans to request Tianma, Urumqi, JVN, Sejong and Italy

KaVA performance evaluation• AGN SWG is responsible for– C2 mode (1Gbps, 128MHz x 2 IF)• 2017: Q-band evaluation completed, open for 2018A• 2018: K-band evaluation– 2Gbps mode
• 2017: first test observations at K/Q, various issues found• 2018: more analysis (various recorders, correlators)– Dual polarization mode
• 2018: test at K/Q including more VERA stations?

Summaryl KaVA AGN SWG are successfully making a smooth transition toEAVN AGN SWG.
l The 1st paper on early science result on M87 w/ KaVA is published(Hada, AGN SWG+17). More results to come.
l In Spring 2017, the KaVA Large Program successfully coincided withEHT. Also, this LP expanded into the “EAVN campagin”
l AGN SWG are leading KaVA+Tianma array performance evaluationby using the EAVN campaign data. Also contributing to various KaVA
performance evaluation items.
l Large Program in 2nd term. More tie-up with EAVN, EHT

Towards EAVN common-use (1/2)

by Wajima-san

Towards EAVN common-use (2/2)

by Wajima-san

Interview by NHK BS premium“Cosmic Front” on “EAVN-EHT campaign in 2017”