~ Toward Future ~ Discussion triggered by Masao Saito

Transcription

1 NRO 45m Telescope ~ Toward Future ~ Discussion triggered by Masao Saito

2 NRO (draft) Mission Science Providing Cutting-edge g Science Capabilities Education Educate Next Generation Astronomers Public Outreach (beyond scope of my talk) Act as National Center of Radio Astronomy These mission must be accomplished given resources. => Simple and Reliable System 2

3 Large Millimeter Antennas NRO 45m IRAM 30m Bonn 100m GBT Mopra LMT D (m) 45 m 30 m 100 m 100 m 22 m 50 m Tsys 150 K N/A 150 K 70 K 80K N/A MB 7 mm Tsys 150 K 150 K 160 K 150 K 200K 100 K MB 3.3 mm NRO 45m needs to get improved to keep up the race. 3

4 If If future plan is based on our desirable state instead of extension of current status, what does it look like? 4

5 Future of NRO 45m Antenna Critical parts are healthy A Few Rxs covering science requirements 20-50, GHz and higher? h Polarization, VLBI Capabilities Room for development by university groups IF/Backend Direct Sampling at IF Freq with off-the-shelf goods. 5

6 Future of NRO 45m Computing CASA Archive Operation Simple, Reliable, easy to maintain Remote Operation Common feel and look with ASTE or others 6

7 Where are we?

8 Antenna Major issues and master plan Sink of Az Rail Subreflector DCPA Beam Switch System Reflector loss in the optical path (#2,3,4) m Surface Accuracy 8

9 Rx Low Frequency H20 Medium Frequency H40, S40, Z45 High Frequency S80, S100, BEARS T70, Tz, FOREST T140 Red: under commissioning for open use 9

10 IF/Backend Panda x 16 Spurious reported. AOS AC45 SAM45 Under precise characterization 10

11 Observations Observing Scripts Zobs Analysis Nostar (OTF) Newstar Archive Under progress 11

12 How to Fill the Gap

13 Resource Manpower Budget Time Resources are very limited, so Choice and Focus is needed as well as collaboration with ATC (NAOJ) and other projects. 13

14 Antenna Sink of Az Rail 2014 Fall Subreflector DCPA Start this fiscal year Beam Switch System T.b.c. Reflector loss in the optical path (#2,3,4) (experiment) Surface improvement by Holography 14

15 Low Frequency H20 Rx Medium Frequency Z45 or ALMA Band 1 High Frequency FOREST (3 mm 4 beam) and post-forest (3-4 mm 4 or more beam) ALMA Band 2/3 Experimental Higher Frequency, Camera, or etc? 15

16 IF/Backend OctadA - VERA Roach2 Kagoshima U. Software Correlator (near or far future?) Direct Sampling at IF 16

17 Computing Observing Script Zobs Analysis Newstar/Nostar t to CASA Archive Re-use of PI/Legacy data (with ALMA?) 17

18 Discussion Where will we discuss? Inside NRO Inside TAC In the NRO user s meeting. With NAOJ Radio Advisory Committee. Until when the plan will be clear? By the end of fiscal year (Mar 2015) When will all implementation ti be complete? By Mar 2018 (target date) 18

19 Summary NRO 45 m telescope will not stay in a competitive position unless development is implemented to meet science requirements. Given available resources, choice and focus and collaboration with other groups are needed. Discussion on-going in the NRO, in the Users meeting, and in the NAOJ committee. Due date is by the end of this fiscal year. 19

20 Your voice is important 20