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I haven't reduced any magnitudes on this, but here is a low resolution spectrum taken with my ST-10xme and SA200 grating right after my photometric exposures:
I have had a couple of observations in V & B and looked at the B-V; using the VStar plug-in. It has blued markedly also like it did in previous brightenings.
thank you very much to everybody for the alert. Although yesterday clouds were present and disturbed the observation, I was able to catch this spectrum. Really impressive the P-Cygni profiles in H-beta and Fe II triplet. These bands display a gas-expansion speed of ca. 660 km/s for the H-beta band, and 600, 670 and 477 km/s for the Fe II triplet. Of course, these measures should be confirmed with a more resolution spectrum.
thanks!
Thank you a lot PAW, I like this kind of new observation, and Z CMa is an interesting star!
My estimation, yesterday 2017/02/24 19:12 UTC magn. +8.0, close to the maximum.
Michel
I haven't reduced any magnitudes on this, but here is a low resolution spectrum taken with my ST-10xme and SA200 grating right after my photometric exposures:
http://astroimage.info/spectra/Z%20CMa_25Feb17SA200.jpg
James Foster
Hi Guys
I have had a couple of observations in V & B and looked at the B-V; using the VStar plug-in. It has blued markedly also like it did in previous brightenings.
Robert.
Hello,
thank you very much to everybody for the alert. Although yesterday clouds were present and disturbed the observation, I was able to catch this spectrum. Really impressive the P-Cygni profiles in H-beta and Fe II triplet. These bands display a gas-expansion speed of ca. 660 km/s for the H-beta band, and 600, 670 and 477 km/s for the Fe II triplet. Of course, these measures should be confirmed with a more resolution spectrum.
Greetings,
Fran