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Heterogeneous Telescope Networks

transientskp
January 09, 2014

Heterogeneous Telescope Networks

Frederic Hessman

transientskp

January 09, 2014
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  1. Heterogeneous
    Telescope Networks
    Frederic “Rick” Hessman
    Georg-August-Universität Göttingen

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  2. The (original) Background
    •  Time-domain astronomy demands flexibility
    •  Large telescopes are inherently inflexible
    •  Small telescopes can be easily operated more flexibly
    •  There are various scientific/institutional reasons not to
    dedicate small telescope resources to a particular
    project
    •  “All” one needs is to be able to pool resources
    January  9,  2014   LOFAR  Transient  Mee9ng   2  

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  3. The History
    January  9,  2014   LOFAR  Transient  Mee9ng   3  
     Exeter  2005  
     GöAngen  2006  

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  4. The Need
    January  9,  2014   LOFAR  Transient  Mee9ng   4  
    Gamma-­‐Ray  Bursts  
    Catalina  Sky  Survey  
    Las  Cumbres  
    LSST  

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  5. The Idea of a Telescope eMarket
    January  9,  2014   LOFAR  Transient  Mee9ng   5  
    HTN  Server   HTN  Client  
    Broadcast  of  poten9al  
    services  (with  details!)  
    Request  for  a  quote  on  a  
    par9cular  observa9on  
    Principle  acceptance  
    indicated    
    Order  for  a  par9cular  
    observa9on  
    Denial  or  acknowledgement  
    and  unique  ID  given  
    Status  /  Abort  request  
    Status  info  
    Report  /  Data  

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  6. The Protocol : Remote Telescope Markup Language
    January  9,  2014   LOFAR  Transient  Mee9ng   6  
    abort        offer  
    acknowledged    reject  
    complete        report  
    confirm        request  
    fail          resource  
    incomplete      update  
    inquiry  
    e.g.  White  &  Allan  2008  

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  7. The Reality / The Lessons
    •  It takes a while (longer than one thinks) to get any
    system running, much less a heterogeneous one
    •  Career paths of major players are relevant
    •  “Simpler” networks are already very complicated
    •  API != implementation and one person’s particular
    implementation may not be another’s
    •  Good science drivers are needed to overcome the
    sociological/institutional inertia
    January  9,  2014   LOFAR  Transient  Mee9ng   7  

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  8. HTN’s “Dornröschenschlaf”
    •  VOEvent has matured (content & delivery)
    •  Many on-going surveys (OGLE, CSS, CRTS, PTF,
    Pan-STARRS, LOFAR, GAIA, …) need follow-ups
    •  Las Cumbres Observatory
    •  Many new “minor” players with resources and
    potential interest
    •  Need to create and exercise now the infrastructure
    needed tomorrow by even bigger surveys like
    LSST, SKA, …
    January  9,  2014   LOFAR  Transient  Mee9ng   8  
    potental  networked  science  
    thorny    problems  
    HTN  

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  9. The Problems
    Assume
    –  some widespread principle interest in providing/sharing
    resources without cumbersome institutional politics
    –  the software to make participation “easy” is available
    What might prevent/stop a HTN effort?
    –  science goals not well-defined enough?
    –  too much heterogeneity?
    –  too little heterogeneity?
    –  too little benefit for the effort?
    –  quality control?
    January  9,  2014   LOFAR  Transient  Mee9ng   9  

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  10. The Generic Proposal
    •  Create a suite of tools to help make any telescope
    (manual, remote, robotic) principally VOEvent-
    aware and HTN-compatible with a “minimum of
    effort”
    •  Encourage the creation of science-driven consortia
    to operate VOEvent-driven and HTN-connected
    networks
    January  9,  2014   LOFAR  Transient  Mee9ng   10  

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  11. The Specific Proposal
    •  Interested parties join forces to create an open-source HTN-
    client with
    –  an absolute minimum level of complexity (use & installation)
    –  transport exactly like VOEvent
    –  example of manual and automatic interfaces practically “out
    of the box”
    –  some help in interfacing (e.g. simple mapping of schemata)
    –  configurable for multiple consortia
    –  define minimum standards of client calibration/participation
    •  Create an open-source HTN-Server to foster creation of
    consortia
    January  9,  2014   LOFAR  Transient  Mee9ng   11  

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  12. The Summary
    •  The original HTN idea was slightly ahead of its time
    •  Things have changed/progressed
    •  We need to respond now to the “follow-up crisis”
    •  The sociological/institutional compunctions against
    joining a heterogeneous network can be overcome
    •  We just need to make it easy to join one or more
    networks by providing standard tools and simple
    implementations
    January  9,  2014   LOFAR  Transient  Mee9ng   12  

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