LISA and H-alpha line

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Rainer Ehlert
Posts: 135
Joined: Thu Sep 29, 2011 9:36 pm

LISA and H-alpha line

Post by Rainer Ehlert »

Hi,

I am starting again with my LISA and would like to know how exact does the 6599 Å line has to be at the position 2.716 mm from the center to the right.

I have a QSI 520i on my LISA and that gives me a calculated location of 1167 pixels or 367 pixels from the center to the right side of the image.

The position of the 6599 Å line ( mentioned in the LISA user guide) is at the moment at 1164 pixels. Calibrating with the integrated NEON lamp does not give me a good calibration on Vega for example.

Does ambient temperature play a roll in this case ?

Thanks for any tips and regards Rainer
regards Rainer____Observatorio Real de 14_____MÉXICO_____N 22° W 101°
Robin Leadbeater
Posts: 1926
Joined: Mon Sep 26, 2011 4:41 pm
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Re: LISA and H-alpha line

Post by Robin Leadbeater »

Rainer Ehlert wrote:Hi,

Calibrating with the integrated NEON lamp does not give me a good calibration on Vega for example.
Hi Rainer,

If your LISA only has the neon lamp I would recommend updating it to use the NeAr RELCO lamp.
http://www.spectro-aras.com/forum/viewt ... f=8&t=1091
That has many more lines, specially at the blue end and will give you a better calibration. Software like ISIS, Spcaudace, Demetra will find the lines for you automatically making the calibration easy

Cheers
Robin
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Rainer Ehlert
Posts: 135
Joined: Thu Sep 29, 2011 9:36 pm

Re: LISA and H-alpha line

Post by Rainer Ehlert »

Robin Leadbeater wrote:
Rainer Ehlert wrote:Hi,

Calibrating with the integrated NEON lamp does not give me a good calibration on Vega for example.
Hi Rainer,

If your LISA only has the neon lamp I would recommend updating it to use the NeAr RELCO lamp.
http://www.spectro-aras.com/forum/viewt ... f=8&t=1091
That has many more lines, specially at the blue end and will give you a better calibration. Software like ISIS, Spcaudace, Demetra will find the lines for you automatically making the calibration easy

Cheers
Robin

Hi,

Thanks Robin. Now that you mention it I remember that I played around with a Fluorescent lamp starter many years ago. I will try to repeat that exercise. I have a lot of those laying around here even already with a resistance in order to connect them to 120 Volt AC.

Rainer
regards Rainer____Observatorio Real de 14_____MÉXICO_____N 22° W 101°
Rainer Ehlert
Posts: 135
Joined: Thu Sep 29, 2011 9:36 pm

Re: LISA and H-alpha line

Post by Rainer Ehlert »

Robin Leadbeater wrote:
Rainer Ehlert wrote:Hi,

Calibrating with the integrated NEON lamp does not give me a good calibration on Vega for example.
Hi Rainer,

If your LISA only has the neon lamp I would recommend updating it to use the NeAr RELCO lamp.
http://www.spectro-aras.com/forum/viewt ... f=8&t=1091
That has many more lines, specially at the blue end and will give you a better calibration. Software like ISIS, Spcaudace, Demetra will find the lines for you automatically making the calibration easy

Cheers
Robin

Hi Robin,

Coming back to this topic I have found starter lamps here in Mexico with Argon and Krypton lines and they look like this. In 2012 Richard Walker from Switzerland helped me to define the lines.

Argon-Krypton_60s_LISA_600mm-0030_C_CC_HT3x0.25_DYB_img.jpg
Argon-Krypton_60s_LISA_600mm-0030_C_CC_HT3x0.25_BYD_Spectrum.jpg
regards Rainer____Observatorio Real de 14_____MÉXICO_____N 22° W 101°
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