spectro-aras.com

Your right Olivier, but I've been putting-off Isis until I get a spectroscopic system that included on object flats. I tried Halogen flats (as seen here: http://www.astrosurf.com/buil/lhires_flat/flat.htm) but either the light source wasn't "pure" halogen or my CDK optics wouldn't work wit...

To: Robin,

Thanks for your efforts!
I have to admit that this spectra accuracy/reduction is mostly beyond my grasp
until I start using the Isis program...which I intend to start learning this spring after
I purchase an Alpy600 (with all accessories) or LHRESIII.

James

Superb work Olivier!
This level of research pushes me to seriously
think about getting the LHIRES III.

Do you use any grating other than the 2400 l/mm
with your LHIRES III?

James Foster
Los Angeles, CA

To: Robin, I did use the generic A5V that was in the Miles/Pickles catalog under Bass1.94. RE:"Good sources of high resolution reference spectra are UVES POP https://www.eso.org/sci/observing/tools ... rface.html and ELODIE 3.1" I wonder if there is a way to save a star's spetra (let's say...

To: Robin, Thanks for the reply. I'll try Castor and/or Regulus for IR. In reply to your question, I used the A5V miles spectrum to divide by my Sheratan spectrum to get my IR. I avoid tracing the "obvious" absorption/emission spikes as seen in my example here: Vega centered near CaK line....

In pursuit of getting another bright A-type star (now that Vega is gone) for image response (IR) of my Spectroscope with the 1800 l/mm grating, here are some spectra (all Normalized except the CaK spectra) of Sheratan: CaK region: http://astroimage.info/spectra/Sheratan_12082016_CaK.jpg H-gamma regi...

For this I only focused on the region of 5630-5760 A for the dates 18-25Dec16:

The is definitely a change in the region just right of the C3 line, between
5690 & 5740 A after 20-Dec-16.

James Foster
Los Angeles, Ca

Here is my chart for activity for WR140 17-25Dec2016. http://www.astroimage.info/spectra/WR140_17-25Dec16Chart.jpg My 17Dec16 data was taking under cloudy/under-exposed conditions and is barely usable. Hope someone gets good data for this quickly descending object in central Cygnus! James Foster Los...

Here is my latest (14Dec16) spectrum of WR140: http://www.astroimage.info/spectra/WR140-chart-14Dec16.jpg CIII and HeI looks more prominent; I did a longer exposure and used a wider slit to improve my spectral efficiency, which at the wavelength is kinda of week. I see a lot of light pollution backg...

I just processed data for WR140 taken on 09 Dec 2016 (sum 8x300sec exposures, 2x2 bin): http://astroimage.info/spectra/WR140_12092016.jpg When I compare this to the data taken on 30Nov16, I see some change in the CIII "mound." Weather has taken a turn for the worse so I may need to go to t...