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Animation of 28 Cyg: observations on December 4th, 5th and 6th :

Dear Ernst,
here we go ! I have followed your suggestions and I got an RV of -2.9 km/sec. Here below some images.

suppress-zone

supress_zone.jpg

spline-filter

spline_filter.jpg

HRV- MM show spectral region

HRV_MM_show_spectral_region.jpg

HRV MM Function of CC


As Laboratory wavelenght ...

Thanks Ernst for your very clear and complete explanation and thanks Robin for your considerations. I agree about the point to keep all parameters consistent: same method, same algorithm, same parameters, same person for spectra and RV evaluation.

About the methods my opinion is that the mirroring ...

Dear Collegaues,

Following the collaboration with Ernst Pollmann related to binary system monitoring I learned from him about an interesting tool usefull to compute the RV. So I have donwload and installed HR-MM 2.1 which is possible to download free at this web site:

http://www.astro.buecke.de ...

In my today observation of p Cyg I noted a decrease in H alpha intensity and EW .

p Cyg.gif

EW December 12, 2012 = -87.2529 A (max intensity = 20.99)
EW January 05, 2013 = -76.4043 A (max intensity = 18.80

EW measured with ISIS, lambda range 6510 6617.

Probably somebody can confirm a similar ...

I have normalized the file using SpcAudace and then I made the EW with the following softwares and using always the same lambda range 6510 6617.

Results:

ISIS: -90.73 A using the FWHM command

VSpec: -95.00 A using console and leq 6510 6617 command

SpcAudace: -89.78 A using command spc_ew _pcyg ...

Thanks Martin ! Very kind.

So finally I measured the EW using SpcAudace.

I calculated it in the range between 6510 6617 A as per Markova doc.

For my p Cyg spectra profile name is:

_pcyg_20121210_847_mleonardi

SpcAudace command is:

spc_autoew _pcyg_20121210_847_mleonardi 6510 6617

The result ...

Sorry to push this up.
I am kindly asking to someone here if he/she can explain to me in what wavelength range I should measure the EW of H alpha p Cyg. I read the previous posts but I am confused with the different terminology. Probably for this campaign an EW Halpha measure method has been agreed ...

Hi Ernst,
yes it will be a big pleasure for me to partecipate at p Cyg campaign. Recently I installed a new grating: 1800 lines/mm (the previous spectra has been made at 600 lines/mm).

Here below please find yesterday night p Cyg spectra with 1800 lines/mmm grating and the EW at H alpha calculated ...

Hi,
this is my spectra made with L200 spectroscope.
and the profile (ISIS):
This is a wonderful object.

Thanks,
Marco