2011-12-15

[Rainer Ehlert]

Hi,

Just arrived in the Observatory and the first thing I did was to change from 23µ slit to the 35µ slit in my LISA.

Then I started to shoot 6 images of 600 seconds on WR 134 and then I went to HD 16523. Later I will post some results.

WR134-006-600s-median-graph.jpg (180.42 KiB) Viewed 6161 times

and here a screenshot of the star in the guiding software

WR134-001-600s-guide.jpg (296.61 KiB) Viewed 6161 times

Tomorrow I will post HD 16523 images

Thanks for reading and looking

[Francois Teyssier]

Hello Rainer,
This seems very correct
You have to do is calculate a good instrumental response
For the record:
http://astrosurf.com/buil/survey/wrstars/wrstars.html
http://www.astronomie-amateur.fr/Projet ... _Lisa.html

(I see that Christian has taken the lead on the atlas)

Best regards
François

[Rainer Ehlert]

Hi Francois,

Thanks for your comments. Here is my WR 134 treated with a CCD Response and compared to Christian Buil's profile (Blue)

WR134-006-600s-median-BuilvsEhlert.jpg (228.14 KiB) Viewed 6145 times

[Rainer Ehlert]

Hi,

As noted down I also made HD 16523 which now I know is WR4, Yesterday night I did not find that description, that is why I put WRXXX

Image of the spectrum, profile comparison to Christian's profile and a screenshot from the guide camera

WRXXX-HD16523-002-1800s-median-BuilvsEhlert.jpg (214.46 KiB) Viewed 6145 times

WRXXX-HD16523-001-600s-guide.jpg (308.53 KiB) Viewed 6145 times

One interesting exercise was comparing 2 series of images. The first series was 6x 600s = 1 hour and the next series was 2x 1800s = 1hour, see image below.

WRXXX-HD16523-002-600s-vs-1800s.jpg (241.7 KiB) Viewed 6143 times

Thanks for reading and looking

[Christian Buil]

Hello Rainer,

Excellent run !
(you use ISIS for the processing ?)

Christian

[Rainer Ehlert]

Hello Rainer,

Excellent run !
(you use ISIS for the processing ?)

Christian

Hi Christian,

Thanks for the flowers

No, unfortunately I am not yet so far as too use ISIS. This was processed in RSpec

[Christian Buil]

No problem - it is your choice !
Try to compute difference (or ratio) of the two spectra (my and your) for detect possible evolution.
Note some possible spectral calibration error near blue-green region (LISA is not very simple to calibrate with
precision).

Christian