OU-EXT Simulation Needs Kerstin Paech University Observatory Munich - - PowerPoint PPT Presentation

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OU-EXT Simulation Needs Kerstin Paech University Observatory Munich - - PowerPoint PPT Presentation

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OU-EXT Simulation Needs Kerstin Paech University Observatory Munich OU-EXT Simulation Needs Kerstin Paech University Observatory Munich External Data to be processed: North: PANSTARRS or HSC -- to be decided South: DES Required Input Data -

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SLIDE 1

OU-EXT Simulation Needs

Kerstin Paech University Observatory Munich

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SLIDE 2

OU-EXT Simulation Needs

Kerstin Paech University Observatory Munich North: PANSTARRS or HSC -- to be decided South: DES

External Data to be processed:

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SLIDE 3

Required Input Data - DES:

Euclid Consortium

DECam and its CCDs

from Brenna Flaugher (Fermilab)

!

62 2kx4k fully depleted CCDs: 520 Megapixels, 250 micron thick, 15 micron (0.27) pixel size

!

12 2kx2k guide and focus chips

!

Excellent red sensitivity

!

Developed by LBNL

!

Packaged and tested at FNAL

!

Read-time <17 sec with <15e read noise

DECam / Mosaic II QE comparison

10 20 30 40 50 60 70 80 90 100 300 400 500 600 700 800 900 1000 1100

Wavelength (nm)

QE, LBNL (%) QE, SITe (%)

g r i z Y

  • 16. May 2012

Copenhagen - DES Overview - Mohr

8

3 deg2 active area

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SLIDE 4

Required Input Data - DES:

area

  • 10 deg2 for a start,

100-200 deg2 better,

  • verlapping with DES

filters/depth

  • (u)grizY 10σ galaxy

depth ~ 24 mag

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SLIDE 5

Required Input Data - DES:

pointing strategy

  • 10x92 sec exposures in griz, 4x80sec in Y
  • 2 or 3 filters per pointing
  • gr in dark time
  • izY in bright/day time

seeing, airmass, sky

  • guidance from BCS/Mosaic2 (Desai et al. 2012)

average ~ 0.85’’ average ~ 0.14 peak@ ~ 22.5, 21.5, 20.5 18.75 for griz Y ~ 18.75

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Required Input Data - DES:

data format and access

  • fits files of raw exposures for download
  • exposure information (e.g. AIRMASS, SEEING, EXPTIME, RDNOISE,...)

including WCS information (TAN or TPV projection)

  • preferably in one MEF
  • preferably HDU[0] should contain all the information that is the same for

all CCDs(e.g. FILTER, INSTRUMENT,...)

  • preferably overscan region in column format

data volume (for ~200 deg2)

  • 3 TB for 10 nights of observing
  • ~20 deg2 (350 exposures of 600MB compressed) per night
  • about 290 science exposures and about 60 calibration exposures (bias +

flats)

catalogs/truth tables

  • for astrometry
  • photometric calibration
  • all simulated objects
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SLIDE 7

Required Input Data - DES:

required for pipeline:

  • crosstalk
  • scattered light
  • dome flats

not necessary for DES (not dealt with in processing):

  • persistent charge effect in DECam
  • non-linearities
  • dark noise
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SLIDE 8

Miscellaneous - DES:

Status/Plan Simulations:

  • None (DECam simulator run by Huan Lin at FNAL)

Framework:

  • Use local data base for testing
  • ingest image and catalog meta data, catalogs into EMA for

next stage of processing Output (processing done at Munich):

  • calibrated stacks (fits format) including weight and bad

pixel masks, PSF homogenized

  • calibrated single images for OU-MER testing
  • calibrated catalogs (in fits format)
  • QA meta data
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SLIDE 9