Here is my first CH Cyg Ha spectra with the LihresIII using the 2400 l/mm grating on the CDK17 telescope with a 23 micron slit:
I used an Ha Vega spectra (same night) to generate the IR file. I also used another set of flats (10x at adu 59K each) taken right after the last set of the calibration lamp images.
Processed in Isis V5.90 using the 3 Ne-Ar lines seen in the calibration lamp set. I didn't eliminate the telluric/h2o lines. I have an Hb spectrum as well, but that will take a little more practice to reduce since the calibration lines in blue are so dim and need to be identified against my Ne-Ar reference chart. Let me know if anything seems amiss.
James
CH Cygni
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Re: CH Cygni
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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- Posts: 439
- Joined: Sun Jan 24, 2016 7:14 am
Re: CH Cygni
Here is my H-Beta spectrum on 12Oct17 using the LihresIII and 2400 l/mm grating on the CDK17 telescope with a 23 micron slit: (R= 13283):
Processed in Isis v5.9.1. Will post more as I go through my last 10 nights of data.
James
Processed in Isis v5.9.1. Will post more as I go through my last 10 nights of data.
James
Last edited by James Foster on Wed Oct 25, 2017 8:11 am, edited 2 times in total.
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
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- Posts: 1521
- Joined: Fri Sep 23, 2011 1:01 pm
- Location: Rouen
- Contact:
Re: CH Cygni
Hi James,
Very impressive absorption in the blue edge of H beta
It should be interesting to show the profile according to radial velocity
Of course, I'm waiting for the fits
François
Very impressive absorption in the blue edge of H beta
It should be interesting to show the profile according to radial velocity
Of course, I'm waiting for the fits
François
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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- Joined: Fri Sep 23, 2011 1:01 pm
- Location: Rouen
- Contact:
Re: CH Cygni
Spectrum obtained on Nov, 28
with a correct SNR in the bue (SNR 30 at 4200 A)
Absorption in the blue edge of H beta,with max velocity ~ -3000 km/s
but less deep than in James' spectrum Blue region Commented H beta range. Note the broad Cr II lines (FWHM ~ 80 km/s)
After strong variation at a time scale of minutes, CH Cyg current state shows important variation of the absorption in thye Balmer lines
A fascinating star!
François
with a correct SNR in the bue (SNR 30 at 4200 A)
Absorption in the blue edge of H beta,with max velocity ~ -3000 km/s
but less deep than in James' spectrum Blue region Commented H beta range. Note the broad Cr II lines (FWHM ~ 80 km/s)
After strong variation at a time scale of minutes, CH Cyg current state shows important variation of the absorption in thye Balmer lines
A fascinating star!
François
François Teyssier
http://www.astronomie-amateur.fr
http://www.astronomie-amateur.fr
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- Posts: 439
- Joined: Sun Jan 24, 2016 7:14 am
Re: CH Cygni
This is probably my one of my last high resolution spectra of CH Cyg in 2017, as it heads behind my house within 1 hour of darkness:
I got a LISA spectra of it tonight I'll try to get one more LhiresIII H-Alpha then head for more easterly targets.
James
I got a LISA spectra of it tonight I'll try to get one more LhiresIII H-Alpha then head for more easterly targets.
James
James Foster
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200
eShel2-Zwo ASI6200MM Pro
Lhires III (2400/1800/600 ln/mm Grat) Spectroscope
LISA IR/Visual Spectroscope (IR Configured)
Alpy 200/600 with Guide/Calibration modules and Photometric slit
Star Analyzer 200