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Observational techniques meeting #5

Observational techniques meeting #5. Narrow (pencil beam): HDF UDF GOODs Cosmos MCT JWST. Future surveys. Deep/wide : CFHTLS ( Megacam ) Subaru Suprimecam Hypersuprimecam DES. Future surveys. All/most sky/time domain: PTF PS1/ skymapper LSST. Future surveys.

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Observational techniques meeting #5

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  1. Observational techniquesmeeting #5

  2. Narrow (pencil beam): HDF UDF GOODs Cosmos MCT JWST Future surveys

  3. Deep/wide: CFHTLS (Megacam) Subaru Suprimecam Hypersuprimecam DES Future surveys

  4. All/most sky/time domain: PTF PS1/skymapper LSST Future surveys

  5. The Palomar Transient Factory There is nothing like searching, if you want to find something. You usually find something, if you search, but it is not always quite the something you were after. ThorinOakenshild

  6. Palomar Transient Factory (PTF) • A 100 Mega-pixel, 7 deg2 camera (CFH12K) on the 48 inch Schmidt Telescope at Palomar that: • -- scans 10% of the sky every few days . . . • -- finds ~1000 transients per year that are tracked by small telescopes for photometry and larger (3-10m) for spectroscopy • -- is creating a deep sky image and lightcurves in 2 bands (g’ and R) that will yield galactic science • -- H-alpha surveys in four bands starting May 2011.

  7. #

  8. The Palomar Transient Factory P60: Followup P48: Discovery Engine 7.26 sq. deg. camera P200: Followup

  9. The PTF camera field of view 92 MPix 1.0 arcsec sampling R=21 in 60 seconds

  10. FWHM and Limiting Magnitude

  11. In 2010: 81% of nights usable 36,933 science images >7 TB

  12. PTF Publications(so far) • Real-Time Detection of a Highly Subluminous Type II-P Supernova with PTF 2011 ApJL submitted • The Extreme Hosts of Extreme Supernovae 2010 ApJ accepted • Evidence for an FU Orionis Outburst from a Classical T Tauri Star 2010 submitted to ApJ • PTF10nvg: An Outbursting Class I Protostar in the Pelican/North American Nebula 2010, submitted to ApJ • Hubble Space Telescope Studies of Nearby Type Ia Supernovae 2010 submitted to ApJL • Galaxy Zoo Supernovae 2010 accepted by MNRAS • Rapidly Decaying Supernova 2010X: A Candidate ".Ia" Explosion 2010 ApJL, 723, 98-102 • Supernova PTF 09uj: A Possible Shock Breakout from a Dense Circumstellar Wind 2010 ApJ, 724, 1396-1401 • The Palomar Transient Factory Survey Camera: 1st Year Performance and Results 2010 SPIE 7735 • PTF10fqs: A Luminous Red Nova in the Spiral Galaxy Messier 99 2010 submitted to ApJ • Core-Collapse Supernovae from PTF: Indications for a Different Population in Dwarf Galaxies ApJ 2010 721 777-784 • Mysterious transients unmasked as the bright blue death throes of massive stars 2010 submitted to Nature • The Palomar Transient Factory: System Overview, Performance and First Results 2009 PASP 121 1395L • Exploring the Optical Transient Sky with the Palomar Transient Factory 2009 PASP 121 1334R • The 12Kx8K CCD mosaic camera for the Palomar Transient Factory 2008 SPIE 7014

  13. Detectors

  14. Eye QE: 1-4% Short integration time (<1s)

  15. Photographic plates QE: 1-2% Long integration times

  16. Photomultipliers QE ~ 50% Long integration times Fast modes

  17. Optical pulsars “Great errors” (video) Photomultipliers: applications

  18. Arrays of pixels, each composed on a photodetector (photodiode), amplifier, and readout electronics, realized on chip using CMOS technology CMOS (active pixel arrays) High QE (>90%), fast readout, cheap, relatively high noise

  19. End

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