ISIS V4.4.0

[Christian Buil]

Une nouvelle version du logiciel ISIS (V4.4.0) : http://www.astrosurf.com/buil/isis/isis.htm
avec les nouveautés ici : http://www.astrosurf.com/buil/isis/new/release.html

New version of ISIS software (V4.4.0): http://www.astrosurf.com/buil/isis/isis_en.htm
and new features: http://www.astrosurf.com/buil/isis/new/release.html

Christian Buil

[Eric Sarrazin]

Merci Christian pour cette nouvelle version.
L'addition du jour julien bien pratique dans le cas du suivi de RR lyre par exemple.
Eric

[Martin Dubs]

Hello Christian,

thank you for the constant improvement of ISIS. The description of the process flow for the echelle:
http://www.astrosurf.com/buil/isis/eshe ... chelle.htm
is most useful and long awaited. I am proposing ISIS as a standard for the Swiss spectroscopy group with some success, both for LHIRES and echelle users. see e.g. http://www.astronomie.ch/forum/viewtopi ... =28&t=6278 (ISIS manual in german)
With the bad weather lately I had the opportunity to test the program with a slightly off topic spectrum but fitting the weather of the last weeks. The lightning was recorded by Martin Huwiler in a single image taken from a movie:

lightning recorded by Martin Huwilwer, Canon G1x 300 L/mm grating

Blitzspektrum.PNG (290.5 KiB) Viewed 5688 times

It was analyzed first with IRIS

preprocessing with IRIS

Blitzspektrum IRIS2.PNG (32.18 KiB) Viewed 5688 times

and for the calibration ISIS was used, with N II lines from the NIST database:
http://physics.nist.gov/PhysRefData/Han ... table4.htm

calibration with H and N II lines

Blitz Calibration.PNG (31.27 KiB) Viewed 5688 times

At this point the possibility to save and load line lists of the the new version comes in very handy for testing different calibrations!
The result came out quite satisfactory (no instrument response yet):

calibrated spectrum

blitz_cal2label.PNG (90.27 KiB) Viewed 5688 times

.
I also tried to improve th appearance of the spectrum by oversampling the initial image in IRIS with a scaling by a factor two, in order to partially reduce the effect of undersampling the image in the low resolution movie mode (the camera lens is better than the image resolution):

improvement of lineshape by subsampling

blitz subsample.png (7.35 KiB) Viewed 5688 times

But of course, most important for me are the echelle improvements.

Regards,

Martin