Transcript NExScI Overview

NASA Exoplanet Science Institute
The Keck Observatory Archive
http://nexsci.caltech.edu/archives/koa/i
ndex.shtml
A collaboration between NExScI and the W. M. Keck
Observatory
G. Bruce Berriman on behalf of the KOA team
June 11, 2010
GRITS, Pasadena, CA
NASA Exoplanet Science Institute
The W. M. Keck Observatory
• Twin telescopes function as an
interferometer
– Data archived at NExScI!
• Each telescope has its own suite
of powerful imagers and
spectrographs
• In 2002, NASA funded an
archive of data from the High
Resolution Echelle Spectrograph
(HIRES)
– Celebrated for its role in the
discovery of exoplanets
• . . . thus was born KOA
http://en.wikipedia.org/wiki/W._M._Keck_Observatory
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Great Moments in KOA History
Date
Moment of Greatness
Aug 2004
Archiving raw data from the High Resolution Echelle
Spectrograph (HIRES) – CCD upgrade. Data available to PI’s
Jul 2005
HIRES observations of Comet Tempel 1 and the Deep Impact
collision served through KOA
July 2006
Public Opening
June 2008
Release of all raw HIRES data 1994-2004
Aug 2008
Release of HIRES Extracted Spectra 2004 onwards
Aug 2009
Release of HIRES Extracted Spectra 1994-2004
May 2010
Release of 900 nights of NIRSPEC data – KOA’s second
instrument!
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KOA Holdings
NASA Exoplanet Science Institute
KOA Raw Data Holdings (May 2010)
KOA HIRES Extracted Spectra Holdings
(May 2010)
Raw Spectra
HIRES
NIRSPEC
Extracted Spectra
Total
# Nights
2,371
1,155
# Observations
64,343
# Science files
291,687
216,918
# Files
31,074,591
Volume
2.1 TB
Public Science Files
Total
HIRES
180,000
NIRSPEC
170,000
# Calibration files
151,106
62,490
Volume
3.5 TB
0.5 GB
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Extracted HIRES Spectra
• KOA developed an automated pipeline for the
extraction of 1-D browse spectra from the raw
science and calibration files
– Upgrade to existing package (makee v5.2.x)
• Wavelength calibration extended to 9800 Å
• Improvements to cosmic-ray masking, tracefinding and slit-finding routines.
• Product contains:
– 1-D spectrum per order per CCD
• Automated extraction grade
• Manual validation of grade
– Diagnostic data including:
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S/N
Traces and profiles
Preview images
Reduction log
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NASA Exoplanet Science Institute
Science Results With KOA
Bonifacio et al.
(2009) A & A
Abundances of
extremely metal
poor stars in a study
of the chemical
history of the Galaxy
Spectrum of CS 31085-024
with model fits superposed
Rivera et al (2010). Ap J.
Used 12.8 years of HIRES data to
discover a Super Earth of 7.4 M
earths in a 5.77 day orbit around
the G0V star HD 1461.
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KOA Under The Hood
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Data Evaluation and Preparation (DEP) and Data Quality Analysis (DQA)
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Trans-Pacific Transfer (TPX)
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Validates the integrity of the headers and content of the FITS files created at the telescope
Adds archive-supporting content to the FITS headers (e.g., program information, image type)
Automated transfer of metadata and data from WMKO to MSC. Ingestion complete the afternoon
following the observations.
Data Storage and User Interface (UI)
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Re-uses IRSA’s component-based service layer architecture
Provides secure access for PIs to proprietary data
Supports searches for science and/or calibration files based on scientific, instrumental, and
program information
File packaging and download support
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User Interface – Three Ways To Get Data
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User Interface – Three Ways To Get Data
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NASA Exoplanet Science Institute
User Interface – Three Ways To Get Data
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KOA Return pages
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KOA on Facebook and Twitter
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NASA Exoplanet Science Institute
Contributors to KOA
Tom Barlow Caltech
Amy Beekley Raytheon
Bob Goodrich WMKO
Stephen Kane Caltech
Mihseh Kong Caltech
Anastasia Laity Caltech
Christina Lau Raytheon
Jeff Mader WMKO
Melanie Swain Raytheon
Hien Tran WMKO
Myrna Tsubota WMKO
… and the managerial
baton passes to
Deborah Levine
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