spectro-aras.com

Posted: **Mon Sep 29, 2014 12:43 am**

Here a sample of Deneb (alpha Cyg) spectra (Halpha region) for the period July-September (BRICE nanosats mission call for observations).
VHIRES-MO spectrograph (radial veolocity of Earth is corrected and H2O telluric lines are removed for a better visibility of the profile change.
The star is always active!

Christian

Posted: **Mon Sep 29, 2014 3:02 pm**

Hi Christian,

I am seeing the same sort of variation. Here are a few of mine.

: deneb H alpha variation 2014-07-23 to 2014-08-19; _deneb_ha_respcor_telrem_helcor_20140723-20140819.png (10.69 KiB) Viewed 3549 times

The earlier quasi periodic variations in RV have changed and it now looks chaotic.

: Deneb_RV_2014.png (7.48 KiB) Viewed 3549 times

Note the small ~1km/s step in RV (seen in the Vega check star measurements) due to remounting of the calibration lamp.

I hope the experts can make some sense out of it !

Robin

spectro-aras.com

High resolution spectra of Deneb (BRICE context support)

High resolution spectra of Deneb (BRICE context support)

Re: High resolution spectra of Deneb (BRICE context support)