Stanimir Metchev's Palomar and Keck Adaptive Optics Page

PHARO Linearity

• Linearity plots for all 4 quadrants (Jan 31, 2003)
• Normalized linearity plots for all 4 quadrants (Jan 31, 2003)
• IDL program to linearize data in un-processed PHARO images
• PHARO linearity (+ other issues) report (Rick Burruss, Aug 17, 2003)

PHARO Plate Scale and Orientation (25mas/pix Camera)

• Memo I (R.J. White, Jul 9, 2002; superceded by Memos II and III below)
  • obtained for the camera center (512,512) using 1 calibration binary at the nominal Cassegrain ring orientation
  • scale: 25.168 +/- 0.034 mas/pix
  • orientation: north is up at a Cass ring angle of 334.034 +/- 0.099 degrees
  • journal reference (pixel scale only): Metchev, Hillenbrand, & White 2003, ApJ, 582, 1102
• Memo II (S.A. Metchev, Sep 3, 2003; superceded by Memo III below)
  • obtained for the camera center (512,512) using 4 calibration binaries at 4 Cassegrain ring orientations
  • scale: 25.22 +/- 0.11 mas/pix
  • orientation: north is up at a Cass ring angle of 334.55 +/- 0.34 degrees
  • journal reference (pixel scale only): Metchev & Hillenbrand 2004, ApJ, 617, 1330
• Memo III (S.A. Metchev, Feb 2005)
  • obtained using an astrometric mask and calibration binaries as a function of detector position for the nominal Cass ring orientation (N up, E to the left)
  • scale: 25.09 +/- 0.04 mas/pix
  • orientation: north is up at a Cass ring angle of 334.92 +/- 0.12 degrees
  • reference: Chapter 4 of my thesis (Metchev 2006)
  • an IDL program, pharo_25mas_distortion.pro, for correcting the distortion as a function of position in the 25 mas/pix PHARO detector scale.

PHARO Coronagraph Extinction

• 100% opaque at all wavelengths

PHARO Calibration Frames (to be added later)

NIRC2 Linearity

• All measured intensities are in counts/pix/coadd
• Mean linearity plot for all 4 quadrants (Feb 12, 2004)
• Normalized mean linearity plot for all 4 quadrants (Feb 12, 2004)
• IDL program to linearize data in un-processed NIRC2 images

NIRC2 Plate Scale and Orientation (Wide Camera)

• measured at the camera center (512,512) using 1 calibration binary
• scale: 39.82 +/- 0.25 mas/pix
• orientation: y-axis is 1.24 +/- 0.10 degrees clockwise from north
• journal references: Metchev & Hillenbrand 2004, ApJ, 617, 1330 (pixel scale), Metchev et al. 2005, ApJ, 622, 451 (orientation)
• IRAF script to correct for the geometric distorion of all NIRC2 cameras (using pre-ship distortion maps)

NIRC2 Coronagraph Extinction

• 2"-diameter spot:
  • 9.27 +/- 0.07 mag at J;
  • 7.84 +/- 0.03 mag at H;
  • 7.19 +/- 0.03 mag at Ks;
  • journal reference: Metchev & Hillenbrand 2004, ApJ, 617, 1330
  • Updated Jun 22, 2005 in r = 160 mas apertures:
    • 9.258 +/- 0.081 mag at J;
    • 7.976 +/- 0.032 mag at H;
    • 7.198 +/- 0.035 mag at Ks;
    • journal reference: my PhD Thesis
• 1"-diameter spot (aperture sizes correspond approximately to 2 x FWHM of the PSF in the wide camera):
  • 8.125 +/- 0.013 mag at J (r = 160 mas aperture);
  • 7.636 +/- 0.037 mag at H (r = 120 mas aperture);
  • 6.912 +/- 0.018 mag at Ks (r = 140 mas aperture);
  • journal reference: none

NIRC2 Calibration Frames (not added yet)

• Bruce Macintosh's (10-sigma limits) [JPG]
• mine (5-sigma limits) [JPG,EPS]