Marianne Gemini

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					Gemini Observatory

   Marianne Takamiya
     October 2000
   Instruments Underway
Mauna Kea       Cerro Pachon
         Instruments Underway
      Mauna Kea           Cerro Pachon
   NIRI               T-ReCS
   GMOS               GMOS
   MICHELLE           GNIRS
   NIFS               FLAMINGOS-2
                       NICI
                       HROS
                      Instrument Availability Summary
                      (Dates indicate first Community access)




                                Op’s Hand-over
Gemini-North




                                                 GMOS
               1999          2000                2001                           2002           2003
Gemini-South




                                                        Op’s Hand-over




                                                                                                      NICI
                                                                         GMOS




                                                                                       GNIRS




                                                                                                         HROS
        Next Generation Instruments
 A near-infrared imager and spectrometer, optimized for MCAO,
  are likely the next set of instruments to be built within the
  Gemini program
 FLAMINGOS-2 will provide some 1-2.5 µm slit spectroscopic
  capability as well
 Imager
      Sample MCAO PSF across ~2 arcmin FOV
      Nominally 2x2 mosaic of 20482 arrays
      1-2.5 µm Rockwell devices, either HAWAII-2 or CdZnTe (requires
       detector development)
       MCAO Optimized Spectrometer

 Baseline design stems from current GIRMOS d-IFU
  tech study occurring at ATC and AAO
      ~2 arcmin deployment field
      1 - 2.5 µm coverage using 6 detectors
      IFUs
        •   12 deployable IFUs total
        •   ~0.03” spatial sampling
        •   ~1x1” field for each IFU
        •   R ~ 6000
Demonstration Science Programs
       Hokupa’a Demonstration
       Science - Plan
 K‟, H, CO and K-cont imaging of in and around the
  Galactic Centre to study the distribution of stellar
  populations vs. distance from Sgr A*
      6-8 fields in the GC
      2 control fields 3 arcmin along plane
      2 fields in “Arches” 10 arcmin North
       Hokupa’a Demonstration
       Science Results
 Overview of data:
      FWHM (H,K‟) = 0.1” - 0.15”
      9 fields of 20”x20” mapped in H and K‟
      6 min (K‟) / 12min (H) to 40min per field
      CO and K-cont on most fields
 CTIO
 K-band
 1.5 arcsec                 6’
                          40”



bow shock?


20 stars/arcsec2
at K~21


                   IRS7
Astronomy Picture of the Day
       astropic.htm
       OSCIR Demonstration
       Science: Planning
 Four options considered for 10um deep field
      „Blank‟ field survey - rejected
        • FOV too small given mid-IR source counts; sensitivity shallow
          compared with ultra-deep ISO surveys
      X-ray selected fields - rejected
        • No suitable sample of reliable hard X-ray sources
      SCUBA-selected cluster fields
      SCUBA-selected HzRG fields
        • Strategy is to observe the brightest from both cluster and HzRG
          lists, four targets in total
        • Some are unknown quantities in the mid-IR; one is a bright-ish
          ISOCAM detection; one has a good redshift, and there is the
          potential for serendipity with some less identified (and perhaps
          higher redshift) counterparts
      OSCIR Demonstration
      Science: Results

 OSCIR DS observations not yet taken place…
   ….but encouraging results (sensitivity, image quality & PSF)
     from first engineering run
QuickStart Service Observing
       QuickStart Overview
 QuickStart enables scientific use of Hokupa'a/QUIRC
  and OSCIR prior to the start of normal operations
      The aims are to exercise proposal, planning and operational
       procedures, refine telescope and instrument performance,
       train support staff and get data out into the community
      Proposals were submitted via the National TACs and ITAC in
       (what will become) the normal process
      Successful applications are being executed by Gemini staff in a
       service mode
        • Phase II detailed definition performed by Gemini Contact
          Scientists (in consultation with PI if necessary)
        • Planning and execution of later QuickStart blocks will have direct
          involvement of National Office support staff from US, UK and
          Canada
        • (Manual) data processing follows pipeline procedures
        QuickStart Proposal Statistics
                           # props   requested time (hr)   oversubscription
                                     HK/Q        OSCIR

       US                    78      544           572           6.4
       UK                    32      179            82           2.8
       Canada                29      104           120           4.1
       Australia             2        56            0            3.1
       Chile                 6        15            5            1.1
       Argentina             9        14            0            1.6
       Brazil                8        10            6            1.8
       Gemini Staff          11       52            52           2.5
       University Hawaii     5        58            0            1.4


       totals               180      1032          837

 Oversubscription assumes 420 hr available and nominal partner
  shares
      Likely to be underestimate as some proposals neglected to include
       significant overheads
0.065 arcsec at 1.65um
        Hokupa’a QuickStart
        Performance
 Performance is consistent with expectations
     Including AO correction as a function of observing conditions and
      WFS target brightness, overheads
     Will refine web information before CfP
 Observing efficiency is consistent with the goal for QuickStart
       30% „shutter-open‟ (cf 15% during dedication imaging)
       Semester 2001A Schedule
       (1 Feb - 31 July 2001)

 Announcement and Call for Proposals - 1 Sept
      NIRI final (on-telescope) Acceptance Test (AT) continues
        • NIRI passed pre-ship lab AT in May
        • Initial HBF lab characterisation occurred in June-July
 NTAC deadline for 2001A normal cycle: end Sept
      Specific date varies slightly from partner to partner
 Ranked proposals due at Gemini: 22 Nov
 ITAC: 13 Dec
 Semester 2001A runs 1 Feb - 31 July
        Top-Level Operational
        Constraints for 2001A
 All capabilites are made available in shared-risks mode
 Baseline instrument availability
    Facility: NIRI
    Visitor: Hokupa‟a+QUIRC, OSCIR
    Not CIRPASS, GMOS, other visitor instruments
 Operational modes
    Queue
    Classical
    May also be partner-run service mode
    Queue & classical modes schedules as blocks
 Permit observations of non-sidereal objects
 30-50% engineering time
         Planned 2001A Phase II
         Preparation
 Require Observing Tool (OT) for NIRI queue
  observations
      Must contain high level of functionality to minimise support
       staff effort
        •   Define NIRI, GCAL and telescope configurations
        •   Define telescope sequences
        •   Field, position sequence and time visualisation
        •   Develop OT library content of commonly-executed configurations,
            sequences and calibrations to ease user learning curve
      Beta-2 version was tested extensively; required development is
       well-understood
 Require database to hold Phase II programs with simple
  query and reporting capabilities
        Observing Tool
        Beta-2 Features
 Target, offset and WFS
  positions, including
  graphical representations.




                                Detailed representation of NIRI OIWFS
                                 and vignetting.
       Gemini Requirements Update
 Available instruments semester 2001A:
      NIRI - near infrared OIWFS most likely only at f/14
      UH AO - no OIWFS, NGS limiting magnitude R~16
      OSCIR - no OIWFS
      GMOS
      CIRPASS - no OIFWS
 Semester 2001A
      Proposals deadline was 30 September 2000. Use of GSC1
      Phase-II we expect to use GSC2
    Gemini Requirements Update
 Until final delivery of GSC 2.2 (January 2001), we will
  continue to use a combination of GSC 1, GSC2.1.X,
  USNO and Hipparcos/Tycho to support guide star
  selections in future semesters.
 Once GSC 2.2 is delivered, it will be made available
  via our server to successful queue/classical observers,
  i.e. those who have been awarded time and are in
  Phase II.
 AO programs require good astrometrics, proper
  motions, and classification to select adequate AOGS:
  R<16-17 with known proper motions and not too
  extended.
     DSS II
 CADC delivered two copies in one band (red) to Gemini
  ~August 1999
 Gemini does not have a large enough jukebox to house all DSS II
  disks. Working a deal with NOAJ.
 ~1/3 of DSSII is installed in Subaru jukebox and accessible via
  our secure network to Gemini since May 2000.
 MOU has been signed two weeks ago by Directors of Subaru
  and Gemini. Green light (lawyers) to load rest of CDROMs in
  Subaru jukebox in early November.
 For political reasons, good to have % of sky covered.
 From users perspective: quick way of knowing if area is included
  in delivered survey.
    GSC II
 Delivery to Gemini started September 1999
 Still not widely used within Gemini because of
  decrease sky coverage compared with existing
  catalogs (GSC1, USNO, 2MASS). “Customers” (read:
  proposal writers and observers) prefer to use catalogs
  that will provide them with all sky coverage.
 Fluxes in standard photometric system.
 For political reasons: good to know % of sky covered.
 From an users perspective: Useful to know if
  star/area is contained in delivered catalog (maybe a
  mute point now but…)

				
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posted:12/3/2011
language:English
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