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ALPY600 Spectrum uploaded to AVSpec

Started by SeymoreStars , Mar 18 2025 11:02 PM

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7 replies to this topic

#1 SeymoreStars

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Posted 18 March 2025 - 11:02 PM

Rather than create separate threads I will just dump them here.

Polaris (alf UMi), spectral type F81b, captured with ALPY600 + AP-140 refractor + ASI533mm. Data Reduction with Demetra.

Comments and criticism welcome.

Steve Hoffman - HSTG

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#2 SeymoreStars

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Posted 30 March 2025 - 10:15 AM

R Leo, spectral type M7-9e, captured with ALPY600 + AP-140 refractor + ASI533mm. Data Reduction with Demetra.

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#3 SeymoreStars

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Posted 24 April 2025 - 05:37 PM

Arcturus (alf Boo) spectral type K1.5111, captured with ALPY600 + AP-140 refractor + ASI533mm. Data Reduction with Demetra.

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#4 SeymoreStars

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Posted 24 April 2025 - 05:39 PM

Regulus, spectral type B81Vn, captured with ALPY600 + AP-140 refractor + ASI533mm. Data Reduction with Demetra.

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#5 robin_astro

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Posted 24 April 2025 - 06:40 PM

Hi Steve,

It looks like your continuum is a bit off (The broad dip around H delta, compare with Regulus from the Melchiors database here for example.

If the dip is not there when you apply your response to the reference star, check that there is no saturation in this region in the regulus spectrum. If you can see it in the corrected reference star spectrum check you have not oversmoothed the response curve in this region.

Cheers

Robin

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#6 robin_astro

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Posted 24 April 2025 - 06:56 PM

Also the rise at the red end in Arcturus does not look right. See the Melchiors spectrum

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#7 SeymoreStars

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Posted 24 April 2025 - 08:32 PM

Hi Steve,

It looks like your continuum is a bit off (The broad dip around H delta, compare with Regulus from the Melchiors database here for example.

Cheers

Robin

The ALPY600 was apart to install the High performance slit 23µm and the ASI174mm guide camera, so focus could be off. The High performance slit 23µm allows me to see dim extended objects.