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Hi Cameron,
Excellent image. Well done. I’m just a few miles North of you in Birmingham, and know how difficult astronomy can be from our orange skies. This is very good indeed!
Keep up the good work.
Gary
Nick,
I would very much like to set up a database of amateur spectra of VS and link it to the VSS website. Roger and I have spoken briefly about this, and he seems to be ‘up for it’ too. I’m hopeful that we can discuss further at the VS meeting (York, June 21 see BAAVSS website) and move on from there. The AAVSO have been slow to move into this field, so I would like to see the VSS take the initiative.
Robin: Very impressive stuff at this faint limit. Many congratulations. I was singing your praises to Bradford AS last night, where I was speaking on Historical Novae. I’m pretty sure they will be contacting you with a view to a possible talk to their group sometime in the future.
Gary
I’ll be at Milton Keynes too, and as a variable star observer myself would be delighted to meet you to discuss the section and VS in general.
What’s your name by the way? There seems to be no current link to a profile for anyone posting to the forum at the moment.
Gary
The most surprising thing about this is the amount of these ‘fakes’ which appear on APOD (which I hardly ever look at by the way). My daughter sends me images from APOD and other sources saying “have you seen this?”. I have to deflate her somewhat and say it’s a fake. I just don’t get it.
Gary
Just a simple observation – the subtracted values bring the light curve closer to visual magnitude – so it must be working! 😉
Gary
Hello Nick,
Speaking personally and with my visual hat on, there is no way a visual observer can compensate for the background galaxy. I’m sure there lies somewhere an obscure equation to allow for this, but I don’t know of it. I have always been sceptical about applying corrections to visual observations – even for red bias in personal equations – as there are just too many factors to take into consideration. Far better to leave well alone.
I can see some unusual behaviour in the light curve in mv compared to V as the SN has faded, and unusually the fading trend is slightly different too, which I find very interesting. In most cases the trend remains similar whilst there are differences in measured values.
Your experiments in removing the galaxy from the image are fascinating, but it doesn’t surprise me that your V measure changes. I hope you’ll keep us informed as to whether you can improve the difference between the two measures. In the meantime I would urge visual observers who are observing this SN (and lets hope that as it fades visual observers keep at it) not to worry about the galaxy at all, and put all their efforts in to obtaining the best visual measure they can get.
Gary
Thanks Nick.
A colour image taken by Nick on the morning of April 5 can be seen on the BAAVSS web pages.
A chart is now available for this Nova from the AAVSO web pages. Visit http://www.aavso.org/vsp where you can create a chart to your own preferences.
Gary
I saw it at 11.4 visual last night too, but it was a tricky observation due to the Nova being quite low in the North (we don’t all have panoramic horizons Denis 🙂 Early hours of the morning are the best bet! And whilst your up and observing in these wee small hours, don’t forget V339 Del (Nova Del 2013), which is still visible around magnitude 11.5’ish.
Gary
