IRAC1	IRAC2	IRAC3	IRAC4
Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution
WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO

• see SEP IRAC Photometry: WPHOT vs. SAGE

IRAC1	IRAC2	IRAC3	IRAC4	MIPS-24
Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution
WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO
WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO
WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO

IRAC1	IRAC2	IRAC3	IRAC4	MIPS-24
Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution	Chi^2 Distribution
WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO
WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO	WPRO vs. WAPPCO
WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO	WAPP vs. WAPPCO

SEP Photometry: WPRO vs. Coadd Circular Aperture

The WPHOT system has been adapted to operate on Spitzer BCDs. The following results show the SEP WPHOT-WPRO results compared to aperture measurements made with the mosaics using Jarrett's photometry package. The aperture measurements include an curve-of-growth correction to adjust to total magnitudes.

• IRAC-1 SEP
  
• IRAC-2 SEP
  
• IRAC-3 SEP
  
• IRAC-4 SEP

• IRAC binned results, including the mag offset between WPRO and the aperture photometry. Presumably the WPRO mags will have to be adjusted by this offset to place it on the proper absolute scale.

SEP Photometry: Comparing Profile-Fitting (WPRO) vs. Aperture Photometry (WAPP)

The results below show the pure "BCD" measurements, comparing WPRO (psf-fitting) with the aperture corrected WAPP (small circular aperture). It is clearly evident that aperture photometry on the BCDs gives very poor results because of the contamination and confusion from nearby sources. The psf-fitting measurements and the coadd measurements (see above) do a much better job and are far more robust.

• IRAC-1 Mag vs. RMS -- this is mag versus the mag uncertainty, which for the aperture measuement is basically the RMS in the repeatibility; red = contamination; green = bad pixels within aperture
  
• IRAC-1 WAPP photometry: single measurements vs. multiple measurements; green == bad pixels; red == contaminated pixels
  
• IRAC-1 WPRO photometry: single measurements vs. multiple measur ements; red == N>1 blend
  
• IRAC-1 WPRO vs. WAPP; red = contamination or Nblend > 1

• IRAC-2 Mag vs. RMS; red = contamination; green = bad pixels within aperture
  
• IRAC-2 WAPP photometry: single measurements vs. multiple measur ements; green == bad pixels; red == contaminated pixels
  
• IRAC-2 WPRO photometry: single measurements vs. multiple measur ements; red == N>1 blend
  
• IRAC-2 WPRO vs. WAPP; red = contamination or Nblend > 1

• IRAC-3 Mag vs. RMS; red = contamination; green = bad pixels within aperture
  
• IRAC-3 WAPP photometry: single measurements vs. multiple measur ements; green == bad pixels; red == contaminated pixels
  
• IRAC-3 WPRO photometry: single measurements vs. multiple measur ements; red == N>1 blend
  
• IRAC-3 WPRO vs. WAPP; red = contamination or Nblend > 1

• IRAC-4 Mag vs. RMS; red = contamination; green = bad pixels within aperture
  
• IRAC-4 WAPP photometry: single measurements vs. multiple measur ements; green == bad pixels; red == contaminated pixels
  
• IRAC-4 WPRO photometry: single measurements vs. multiple measur ements; red == N>1 blend
  
• IRAC-4 WPRO vs. WAPP; red = contamination or Nblend > 1

Epoch 1 (mid August, 2007), IRAC observations of the NEP

• IRAC-1 (fov ~ 47 arcmin); mosaic after artifact clean

• IRAC-2 (fov ~ 47 arcmin); mosaic after artifact clean

• IRAC-3 (fov ~ 47 arcmin); mosaic after artifact clean and delta-dark subtraction

• IRAC-4 (fov ~ 47 arcmin); mosaic after artifact clean IRAC-4 (fov ~ 47 arcmin)

MIPS Scan Map of the NEP

• PBCD mosaic of the NEP

MIPS Scan Map of the SEP

• PBCD mosaic of the SEP

Proposed IRAC and MIPS AORs for the SEP 'gap'*

• IRAC Ch4, Epoch 1 (Dec 12, 2007) as overlayed on the SAGE IRAC-1 image

• IRAC, Epoch 2 (Dec 19, 2007) as overlayed on the SAGE IRAC-1 image; (magenta = IRAC 2,4; blue = IRAC 1,3)

• MIPS 24um, Epoch 1 (mid Dec, 2007) as overlayed on the SAGE 24um image