a transient astronomy free for all at the astronomer s telegram l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
A Transient Astronomy “Free for All” at The Astronomer’s Telegram PowerPoint Presentation
Download Presentation
A Transient Astronomy “Free for All” at The Astronomer’s Telegram

Loading in 2 Seconds...

play fullscreen
1 / 21

A Transient Astronomy “Free for All” at The Astronomer’s Telegram - PowerPoint PPT Presentation


  • 304 Views
  • Uploaded on

A Transient Astronomy “Free for All” at The Astronomer’s Telegram Derek B. Fox, Caltech Robert E. Rutledge, McGill VO Events Meeting Pasadena – 13 April 2005 A Transient Astronomy Free-for-All ATEL in Context What need does it serve? How does it work? ATEL in Action

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'A Transient Astronomy “Free for All” at The Astronomer’s Telegram' - paul2


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
a transient astronomy free for all at the astronomer s telegram

A Transient Astronomy“Free for All” at The Astronomer’s Telegram

Derek B. Fox, Caltech

Robert E. Rutledge, McGill

VO Events Meeting

Pasadena – 13 April 2005

a transient astronomy free for all
A Transient Astronomy Free-for-All
  • ATEL in Context
    • What need does it serve?
    • How does it work?
  • ATEL in Action
    • How has it been used?
    • What have we learned?
  • From ATEL to VO Events
    • Minimal standards for VOE
    • ATEL-like components
    • New/Novel components
the astronomer s telegram
The Astronomer’s Telegram
  • Online December 17, 1997
  • Founder: Bob Rutledge
  • Application of the Web to transient astronomy
  • All Perl CGI
  • Daily emails + Instant Notices

On the same day:

  • GCNs #9 to #13 on GRB971214
  • IAUC 6791, also on GRB971214
atel approach
ATEL Approach

Philosophy:

  • Universal access
  • Vet authors on registration
  • Trust them thereafter . . . (can revoke if necessary)
  • Complete automation
  • Instant distribution
    • On web in seconds
    • Email in minutes (instants)
    • A must for transient astronomy
  • Free for all
universal access collaboration
Universal Access  Collaboration
  • Observers expect others to be aware of ATEL
  • Watch ATEL for transient events
  • Respond by initiating observations
  • Post results to ATEL

Extremely rich phenomena are intensively observed, without prior agreement, between major observers at the largest facilities

atel usage
ATEL Usage

In the 7 1/2 years since:

  • ATEL #457 – all freely available via ADS query
  • GCN 3255
  • IAUC 8509 (+1718) – approx. 5000 notices
  • CBET 137 – New since Jan 25, 2005
  • Multiple project-specific mailing lists
atel users
Authors self-describe telegrams by bandpass and subject matter

Multiple selections are allowed & encouraged

107 “Requests for Observations”

18 “Comments”

ATEL Users
atel lessons
ATEL Lessons
  • Personal registration of users
  • HTTP User + Password sufficient to verify (cookie)
  • Cryptographic signatures still rare
  • Content verification via the website
  • Authors have “pushed the envelope” for instant notices
  • Theory telegrams didn’t work
  • Observers encouraged to interpret results
registration of users
Registration of Users

Necessity of vetting users

  • Verify identity by personal contact
  • Professional astronomers and graduate students

Considerations:

  • Several requests per year from non-astronomers
  • Amateur astronomers would like to post
  • Usually users attempt to post prior to registration
instant email notices
Instant Email Notices

Exception to daily emails intended for:

  • Discovery with new coordinates
  • New outburst of known transient
  • Typing of supernova
  • Request for observations
elements of vo events
Elements of VO Events
  • XML Schema
    • Event Coordinates
    • Event Properties
    • Descriptive elements
  • Distribution channels
    • Vetted in advance
    • Providing event verification
    • Cafeteria style selection (not all or nothing)
  • Registration service
    • Identity
    • Qualifications
elements of vo events18
Elements of VO Events

ATEL:

  • Schema
    • Author names + affiliations
    • First author email address
    • Telegram Title (string)
    • Wavebands + Object types
    • Text description
  • Distribution channels
    • Website, Email, RSS
    • Event verification by visiting the website
  • Registration service
    • Personal contact by Editors
the information registry
The Information Registry
  • VO Events may enable machine-intiated observations on subsecond timescales.
  • To work in this fashion they must have registry metadata enabling identity and content verification
  • If these are not included in the VO event schema then events will be distributed only between previously known & trusted sources, and the utility of a universal schema will be lost.
from atel to vo events
From ATEL to VO Events

VO-Events:

  • XML Schema
    • Ongoing process
  • Distribution channels
    • Website, Email, RSS, SOAP
    • Identity verification
    • Content verification
  • Registration service
    • ?
the vo event free for all
The VO Event Free-for-All
  • ATEL has been up for 7.5 years
  • Instant access enabling progress in transient astronomy
  • Registration of users has allowed us to trust them
  • Increasing usage + diversity of subject matter

VO Events as a free-for all:

  • Flexibility of subscriptions
  • Flexibility of subject matter
  • Freedom of access
  • Verification of author and content provided