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An ARC model for Chile

A proposal for the best Chilean use of ALMA

Diego Mardones, Universidad de Chile
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ALMA stands for "Atacama Large Millimeter Array" and is also the spanish word for Soul


1. ALMA observatory: A world wide effort
· Construction between 2003 and 2013. · US$1500 million by a European, North-American, and Eastern Asian consortium.

World = ALMA partners + Chile + others
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1. ALMA observatory
Early Science observations with 16 antennas began in October 2011

8 antennas on site in October 2010

· 32 antennas in 2012 · 48 antennas +ACA in 2013 · Full array available from 2014
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<2 years for full ALMA


The ALMA observatory

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1. ALMA observatory
· >260 Terabytes of data expected per year · Chile has 10% observing time

Charlottsville, USA

Mitaka, Japan

· 4 copies of full database: Chile & · Regional Center (ARC) user support in Europe, USA, and Japan for
· proposal preparation, · data distribution · Pipeline for data reduction, resulting in fully calibrated images · Tools for spectral analysis, line fits, chemistry, radiation transfer
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The ALMA observatory

ARCs really are integrated in ALMA

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The ALMA observatory

32 astronomers, 18 computing, 6 administrative

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The ALMA observatory

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2. Chile
· Young community of 100 astronomers +50 graduate students with few interferometry experts (~10%) · JAO operates in Chile through agreements of each of the three ALMA executives:
· U. of Chile with AUI and NAOJ · Conicyt

with ESO

generates either union or fights

· Each executive
· grants 10% of its observing time to Chilean proposers · supports Chilean astronomers as "members" · provides some annual support to Chilean astronomy (ALMA-Conicyt fund)

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2. Chile,
postdocs"

first option: just use the 3 ARCs

· Happening by default if we don't do anything · school of: "why bother if the ARCs serve us anyway, let's spend the money on · Issues: · Need to retrieve data from northern hemisphere, slow and expensive. · difficult user support · "left behind" software & analysis development and use · Benefits: · Access to broad range of ALMA expertise for help

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2. Chile,

second: create new ARC

· Huge effort in human and computer resources. · Dimensioned based either on data (~10%), or on community size (~2%). · Hard to represent all of ALMA science with limited personnel. · unlikely (and no need to) to replace all of the ARC expertise. · But ARC personnel have duties in:
1. ALMA operations 2. Data services 3. User support

· Benefit: Chileans can support international communities ...
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2. Chile,

third way: ARC-node +network

· Keeps official access to 3 ARCS · Communications with ALMA and with Chileans are critical · Minimum personnel required:
1. astronomer for high level communications with ALMA & Chile 1. postdoc to coordinate user support between ALMA staff & Chile 1. postdoc to coordinate data services & distribution 1. computer engineer to coordinate software development mini-ARC

· Network and adequate information services to keep community informed/educated · 1 staff + 1 postdoc from each Chilean institution.
micro-ARC

· Dedicated hardware for ALMA data center, either 10% or 100% of data.
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3. A Chilean ALMA Center
· Is essential to support Chilean astronomers for competitive use of ALMA · Only possible through combined expertise in computer sciences and astronomy, currently being implemented as 1. Chilean-ALMA Network: led by Diego Mardones from UChile (2011-2012)
· 2010 ALMA-Conicyt US$130 000 grant 31100018: "Chilean Network Coordination for

an ALMA Regional Center"
· 1 Faculty + 1 postdoc per participating institution.
· 5(8) Chilean Universities & the ALMA observatory. · Establishment of computer servers and coordination with Computer Science efforts. · Sharing of technical ALMA expertise. · Organization of Chilean ALMA schools + tutorials, travel support.

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2010: chair of ALMA-Chile committee which defined the Chilean access to ALMA time.
2002-2007: Chilean member of the ALMA Science Advisory Committee.


3. A Chilean ALMA Center

2. Establishing Chilean ARC Functionality:
· 2011 ALMA-Conicyt grant 31110012: "Establishing a Chilean ALMA Regional Center"

led by Diego Mardones (US$200 000; (Mauricio Solar) and CMM
· Hiring of

2012-2013)

· Astronomers from Chilean ALMA Network + Computer Scientists from UTFSM

postdoc #2

to coordinate data services & distribution.

· Conicyt hired Ramiro Franco-Hernandez (postdoc #1, 2011-2015), head of user

support.

part of ALMA system

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Professors UTFSM: Mauricio Solar, Cecilia Reyes, Horstvon Brand, Luis Salinas, Hector Allende Organized International ALMA Common Software conferences 2007-2010


3. A Chilean ALMA Center

2. Establishing Chilean ARC Functionality:
· Computer Sciences led by Mauricio Solar from UTFSM (27 people)
· 2008 ALMA-Conicyt grant 31080031: "Computer Science for ALMA: Strengthening

Research and Development"
· 2009 ALMA-Conicyt grant 31090034: "Software Development for ALMA:

Strengthening Collaboration Networks"
· Additional support from ESO, ALMA, NRAO.

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Professors UTFSM: Mauricio Solar, Cecilia Reyes, Horstvon Brand, Luis Salinas, Hector Allende Organized International ALMA Common Software conferences 2007-2010


3. A Chilean ALMA Center

3. Computing development proposals:
· 2012-2014 submitted joint Fondeff proposal: "Development of an Astro-informatics platform for large-scale data processing and an ALMA Regional Center" (US$500 000)
· Mauricio Solar (UTFSM) & Computer Scientists from UCh, UdeC, PUC, USACH,

UTFSM;
· with Diego Mardones (UCh) & astronomers from UdeC & PUC.

· 2011 fondequip proposal to start the Chilean ALMA data archive

(US$300 000 rejected; to reapply in 2012)

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Mauricio Solar (UTFSM, IA & HPC); John Atkinson (UdeC, IA); Karim Pichara (PUC, data mining); Vistor Parada (Usach, Optimization); Marcelo Mendoza (UTFSM, data mining); AndrÈs Escala (Co-I of Kawacs; Chilean connectivity for astronomy).


ALMA data rates
n

End of 2011: typically 1 MByte/s
n

10-100 GB/day, expected 1 TB/day, up to 300 TB/yr more data per unit time better sensitivity and image capability

n

2014 on:
n n n

n n n

More shorter projects, say 10-30 min obs. Also advent of Large legacy projects, teams, ... Full projects from 10 GB to 100 TB


3. Current Chilean Computing Resources
· Computer clusters at UChile and PUC are sufficient for hydrodynamical simulations and analysis of Early Science ALMA observations. · U Chile Astronomy: 80 cores, 160 GB RAM,20 TB in discs, US$50k · PUC Astronomy: 1024 cores, US$1 million · National Lab for High Performance Computing (2011+); 2000 cores US$3 million · Dedicated ALMA data computer US$250 000/yr


3. A Chilean ALMA Center

3. Problems:
· No support from Conicyt, including active administrative and legal discouragement

of current initiative ... a war I never suspected or wished to be involved in.

· No long-term funding identified. · 2 postdocs US$100 000 · computing, administration · travel, publications

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Mauricio Solar (UTFSM, IA & HPC); John Atkinson (UdeC, IA); Karim Pichara (PUC, data mining); Vistor Parada (Usach, Optimization); Marcelo Mendoza (UTFSM, data mining); AndrÈs Escala (Co-I of Kawacs; Chilean connectivity for astronomy).


Thank You