BF Cyg
Posted: Thu Apr 02, 2015 1:52 am
BF Cyg around H alpha for 2015-04-01 (AAVSO Vmag 9.5)
I had excellent transparency and seeing so I calibrated to flux (based on the Cflib reference star HD182568 - Vmag 5.00).
The expanded plot shows a comparison with my last low res spectrum from 2014-06-16 also calibrated for flux by using a Vmag of 10.6 (from AAVSO)
An interesting shape for H alpha.
It would appear that the although there has been a full magnitude of brightening the total intensity in the H alpha line has actually decreased.
I don't know if this makes any sense.
Tim
I had excellent transparency and seeing so I calibrated to flux (based on the Cflib reference star HD182568 - Vmag 5.00).
The expanded plot shows a comparison with my last low res spectrum from 2014-06-16 also calibrated for flux by using a Vmag of 10.6 (from AAVSO)
An interesting shape for H alpha.
It would appear that the although there has been a full magnitude of brightening the total intensity in the H alpha line has actually decreased.
I don't know if this makes any sense.
- _bfcyg_flux_Ha.png (6.69 KiB) Viewed 2687 times