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Tomoya Hirota (NAOJ),
- n behalf of VERA project
Contents
- Science
– Not including KaVA and EAVN; See other presentations
- Operation
- Maintenance and development
- Future plan
Status of VERA Tomoya Hirota (NAOJ), on behalf of VERA project - - PowerPoint PPT Presentation
Status of VERA Tomoya Hirota (NAOJ), on behalf of VERA project - - PowerPoint PPT Presentation
Status of VERA Tomoya Hirota (NAOJ), on behalf of VERA project Contents Science Not including KaVA and EAVN; See other presentations Operation Maintenance and development Future plan Science 3D structure and dynamics of
SLIDE 2
SLIDE 3
Science
- 3D structure and dynamics of Milky Way Galaxy
based on accurate astrometry at up to 10mas
- Latest results (ver. July 26, 2018)
– VERA: 125 sources – VERA+BeSSeL+EVN: 196 – Including >10kpc-sources – R0=7.94+/-0.25 kpc – Q0=234+/-8 kms-1
- To be completed by 2022
March (end of FY2021)
Compiled by Nagayama
GC SUN
SLIDE 4
Science
- 3D structure and dynamics of Milky Way Galaxy
based on accurate astrometry at up to 10mas
- Latest results (ver. July 26, 2018)
– Galactic rotation curve is nearly flat between R=5-15 kpc
Compiled by Nagayama
SLIDE 5
Operation
- From September, 2017 to August, 2018
– Total 3840 hours – About 30 sources in 20 schedules for VERA astrometry (maser-reference pairs) every month
number time(h) VERA project 294 2001 VERA Common Use 19 166 VERA Geodesy 22 538 JVN KaVA project 43 417 KaVA LP 30 211 KaVA Common Use 68 507
Compiled by Shibata
SLIDE 6
Operation
Compiled by Shibata
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Operation
Compiled by Shibata
SLIDE 8
Operation
Compiled by Shibata
SLIDE 9
Operation
- Total about 15 scientists/engineers/operators/. . .
– Mizusawa-based operation group led by Shibata – Local staff in each station
- Various duties
– AOC operation for regular VLBI observations – Single-dish observations – Correlation – Data analysis with VEDA pipeline – Data check, astrometry analysis, software developments, . . .
SLIDE 10
Maintenance and development
- Keeping the system for stable operation
– Led by Ueno
- Upgrading the system for new sciences
– Regular operation in dual-beam astrometry mode at 4Gbps – Wider-band (12Gbps) for internal observations (Oyama et al.) – Multi-frequency under commissioning (with KASI) – Dual-polarization under commissioning (Hagiwara et al.) – GPU correlator, L/S-band, ultra broad band, . . . (Oyama et al.) – Calibration, astrometry technique (Nagayama, Mikyoung Kim et al.); See poster by D. Sakai
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Future plan
- From VERA to KaVA, EAVN, global array (e.g TNRT)
- Finally SKA and/or SKA+VLBI remote antennas
– Registered as SKA pathfinder (July 3 2018) – Led by Kobayashi and Akahori for planning new project in NAOJ
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Summary
- VERA is keeping (quasi-)steady state but gradually
upgrading system performance
- VERA science project (Galactic astrometry observations)
will be finished by 2022 March (end of FY2021)
– This does not mean the end of VERA array
- Future plan are under discussion
– From VERA to KaVA, EAVN, global array (e.g TNRT) – Finally SKA and/or SKA+VLBI remote antennas