High Level Information

N545

Stats:
- D = 79.0 ± 4.0, Jensen+21 SBF
GMOS:
- All files seem to be on BOX.
- Has both symmetric and non-symmetric binning schemes.
- Other details:
  - Files on BOX say:
    - Files on BOX say +x axis of the GMOS data is at -120 deg. E of N.
  - PSF listed as: avg. FWHM = 0.42" (Gaussian)
  - 164 bins (symmetric)
  - 158 bins (non-symmetric)
Mitchell
- All Mitchell files for all galaxies are present! There are folded and unfolded versions for everything. I'm currently sticking with our usual unfolded data.
- 27 bins (unfolded)

N547

Stats:
- NGC 547
  - D = 75.5 ± 3.3, Jensen+21 SBF
GMOS:
- Lots of files are not currently on BOX it seems. Will check with Emily if they're on her hard drive.
- Seems to have both a symmetric and non-symmetric binning scheme. Likely will update the non-symmetric scheme when the files are passed from Emily.
- Other details:
  - Files on BOX say +x axis of the GMOS data is at +94 deg. E of N.
  - PSF listed as: avg. FWHM = 0.50" (Gaussian)
Mitchell:
- All Mitchell files for all galaxies are present! There are folded and unfolded versions for everything. I'm currently sticking with our usual unfolded data.

N545

Don't have all the data for N547 just yet, so I started with N545.

Reproducing Irina's Results

First, I started by reproducing Irina's results:
- Symmetric binning scheme with the associated spectra
- Using the mask on BOX which is the same as the one below.
- Table 2 of Barth+02 for the template stars.
- Uncertainties are computed with 100 MC iterations.
Irina lists the settings on BOX as:

Nominal settings for pPXF fits to NGC 545 GMOS data
---------------------------------------------------

Wavelength range (rest):  8420-8770 A

Template list:  barthlist.txt
(15 stars from Barth et al. 2002 -- spectra are from MILES Calcium Triplet library)

Spectrum mask:  /GMOS/galaxy_files/N545/spectra/N545_spectra_mask.fits
(bright sky lines and chip gaps as assessed from inspection of GMOS spectra)

Initial velocity shift: 5300 km/s

Multiplicative polynomial: degree 3

Additive polynomial: degree 0  (constant offset)

Bias parameter: 0

With these settings, I can wonderfully reproduce her results.
Here are some diagnostics from this reproduction.
- Note that the kinematics here are not point-symmetrized.
- These also use the symmetric binning scheme (whereas we'll likely use the non-symmetric binning scheme for the actual modeling), but I wanted to make sure I was able to reproduce her values.

Bin Centers	Radial Moments	GMOS Maps	Mitchell Maps	Kinematic Comparison

And the spectra and resulting fits look beautiful!

Plot

Extending to h8 with non-symmetric binning scheme

I moved straight the the Gh8Mh6 with asymmetric binning scheme since the reproduction was so clean. Again, I have the same settings as above here, but switched to the asymmetric binning scheme with the series cut off at h8 now.