SINGS

I am involved with the spectroscopic component of SINGS, in particular the spatially resolved mid-infrared spectral mapping of the nuclei and selected extranuclear regions with Spitzer's IRS Spectrograph.
Some useful SINGS links here:
- The SINGS observing schedule.
- A collection of Reach-model backgrounds for observed SINGS targets.
- Maps of requested and reconstructed pointing positions for all SINGS IRS observations.
- A short write-up on extended source flux calibration issues with the IRS.
Password-Protected Internal SINGS pages:
- NGC 7331 ApJS Special Issue working paper page.
- NGC 5194 page.
- NGC 5866 page.
- DR2/DR3 Auto Cubes repository.
- The full internal SINGS directory.
Spectral Mapping

The 5-40μm range which Spitzer spectroscopy probes is extremely rich in nebular, photo-dissociation region and molecular hydrogen lines. We are exploring a variety of diagnostics which take advantage of the spatially resolved spectro-imaging used throughout the SINGS program.
PAH Features

A new feature at 17.1μm, discovered in SINGS galaxy NGC 7331, is currently being investigated, and can be seen in the composite low-resolution spectrum of the inner kpc at right. This strong feature (up to 50% the luminosity of the 11.3μm feature) is also found in the Galactic reflection nebula NGC 7023.
A comprehensive tool for decomposing the MIR spectra of galaxies and other objects is available in PAHFIT.