The Keck Observatory Archive

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1 The Keck Observatory Archive index.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

2 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 2

3 Great Moments in KOA History Date Moment of Greatness Aug 2004 Archiving raw data from the High Resolu2on Echelle Spectrograph (HIRES) CCD upgrade. Data available to PI s Jul 2005 HIRES observa2ons of Comet Tempel 1 and the Deep Impact collision served through KOA July 2006 Public Opening June 2008 Release of all raw HIRES data Aug 2008 Release of HIRES Extracted Spectra 2004 onwards Aug 2009 Release of HIRES Extracted Spectra May 2010 Release of 900 nights of NIRSPEC data KOA s second instrument! 3

4 KOA Holdings KOA Raw Data Holdings (May 2010) Raw Spectra HIRES NIRSPEC # Nights 2,371 1,155 # Science files 291, ,918 # Calibration files 151,106 62,490 Volume 3.5 TB 0.5 GB KOA HIRES Extracted Spectra Holdings (May 2010) Extracted Spectra Total # Observations 64,343 # Files 31,074,591 Volume Public Science Files 2.1 TB Total HIRES 180,000 NIRSPEC 170,000 4

5 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: S/N Traces and profiles Preview images Reduction log 5

6 Science Results With KOA Spectrum of CS with model fits superposed Bonifacio et al. (2009) A & A Abundances of extremely metal poor stars in a study of the chemical history of the Galaxy 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

7 KOA Under The Hood Data Evaluation and Preparation (DEP) and Data Quality Analysis (DQA) 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) Trans-Pacific Transfer (TPX) Automated transfer of metadata and data from WMKO to MSC. Ingestion complete the afternoon following the observations. Data Storage and User Interface (UI) 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 7

8 User Interface Three Ways To Get Data 8

9 User Interface Three Ways To Get Data 9

10 User Interface Three Ways To Get Data 10

11 KOA Return pages 11

12 KOA on Facebook and Twitter 12

13 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 13