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New nova in delphinus

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#151 MtnGoat

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Posted 09 September 2013 - 12:05 PM

I thought it was just me, but last night it was so much redder I realized it couldn't be. I noticed it going from what was very close to white near peak to a more yellowish tinge about a week ago, and last night thought it had acquired a more ruddy reddish tinge.

#152 C_Moon

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Posted 09 September 2013 - 10:01 PM

Just viewed now after not being able to for a few days and I was struck by how red it looked. Didn't see the previous posts until just now.

#153 canukLX90

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Posted 10 September 2013 - 03:28 AM

I have noticed the red color in my images over the last
couple of times. Here is what I took this evening.
10 X 30 seconds @ ISO 800 with modded 450D DSLR and
PowerNewt @ F 2.8 No processing done other than crop from
full frame.

PJ

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#154 nytecam

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Posted 10 September 2013 - 11:17 AM

Thanks Rob for sharing - very impressive and colourful results. :bow: Hope you post animation on Youtube! :grin:

#155 MtnGoat

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Posted 10 September 2013 - 11:22 AM

I've got about 25 nights worth now myself, at some point I'll figure out what to do about them. 20, 10, 2 sec exposures at 6400 iso.

I did an entire summers worth of SS cygni a few years ago, caught three bursts... I never did do the animation!

#156 Special Ed

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Posted 11 September 2013 - 04:55 AM

Observed Nova Del 0115 11 Sept UT with my 12x36 binoculars. Estimated the mag to be 7.3-7.4--transparency not as good as my last observation and a little moonlight. Didn't notice any color but I don't see color very well.

#157 Olivier Thizy

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Posted 12 September 2013 - 08:00 AM

Hello,


I have been following the nova in spectroscopy with an Alpy 600 spectrograph on a small 85mm refractor since the begining. Weather is getting poor here but I have done some animation/graphs showing the changes.


See: http://www.spectro-a...&start=110#p...

Graph:
[image]http://www.spectro-aras.com/forum/download/file.php?id=1087[/image]

2D color spectral evolution:
[image]http://www.spectro-aras.com/forum/download/file.php?id=1088[/image]


ARAS forum includes spectral observations from about 35 observers and multiple spectrographs with multiple resolution. Those spectra with scientifical interest are archived on ARAS database (more than 600 spectra) and are available for download so you can have a look at my spectra FITS file there:
http://www.astrosurf...va-Del-2013.htm


There is also an ARAS web page with explanation from Steve Shore, a professional astronomer who is helping us to better understand the astrophysics behind the scene. I have really enjoyed his explanations so far... :-)
http://www.astrosurf...ova2013Del.html


This is really an exceptionnal object to follow up, specially in spectroscopy!

Cordialement,
Olivier Thizy

#158 MtnGoat

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Posted 12 September 2013 - 12:37 PM

Yup, looking a leetle bit redder every night! Very cool. I love this thing!

#159 RobK

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Posted 12 September 2013 - 07:44 PM

Phenomenal work Olivier, congratulations to you and all the other ARAS 'spectroscopists'! Great demonstration of how amateurs can concentrate their efforts and skills to produce unprecedented coverage and a scientifically-valuable archive. :waytogo:

Cheers -

Rob

#160 Dean Norris

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Posted 15 September 2013 - 04:47 PM

My latest magnitude estimations of the nova:

7.6 at 8 UT on 9/6/13
7.4 at 8:10 UT on 9/11/13
7.7 at 5:30 UT on 9/15/13

Last night I observed the nova with 7x50 binos, 9x50 finder and at 51x in my 10" f/6 newt. In the newt it had a red color which wasn't seen in the finder or binos. It's amazing how fast these changes occur. When the nova was brightest, I saw it's color as yellow.

Dean

#161 NJScope

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Posted 20 September 2013 - 07:59 AM

Here's the latest spectrum (19Sept2013) from Nova Del 2013 which continues to show dominant Balmer emission lines (Halpha, Hbeta, Hdelta and Hgamma).

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#162 SStoffer

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Posted 23 September 2013 - 12:33 AM

Long time, no see everybody! I had a very active summer observing just about everything. And the biggest event happened for me on August 16 with Nova Delphinus.

I have followed this nova for the past month because it is the first one I have ever seen. I finally got a chance this evening to observe it to see its color. It is red indeed as the spectrum in the last posting on this thread shows.

However, I was expecting it to be an even a deeper red. Can these novae appear like carbon stars when fading, at least part of the cycle? I sure would like someone else to answer this question.

Observing this object brings back memories when I had a chance in 1975 to see Nova Cygni. It was so notable an event our local weatherman one evening on television said there was a new star in the heavens. Unfortunately, he provided no chart to find it. Lack of current information (no internet in those days) available caused me to miss seeing it. If I only had been patient and used a star chart I could have easily seen it since it was so bright and near Deneb. I hope to live to see one that bright again.

-Stephen

#163 SStoffer

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Posted 23 September 2013 - 02:20 AM

On a second thought, since my mirror fully cooled down and star images are more focused, it does seem to appear as a carbon star. And staring at it makes it appear less red.

It is around magnitude 8.

-Stephen

#164 BrooksObs

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Posted 23 September 2013 - 09:47 AM

"Observing this object brings back memories when I had a chance in 1975 to see Nova Cygni. It was so notable an event our local weatherman one evening on television said there was a new star in the heavens. Unfortunately, he provided no chart to find it. Lack of current information (no internet in those days) available caused me to miss seeing it. If I only had been patient and used a star chart I could have easily seen it since it was so bright and near Deneb. I hope to live to see one that bright again." -Stephen

Might be a long wait. Although they occur quite randomly, there has been a decided lack of novae of 1st magnitude or brighter since the early 1940's. In fact, Nova Cygni in '75 is the sole example since I started observing back in the mid 1950's!

BrooksObs

#165 Special Ed

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Posted 23 September 2013 - 09:23 PM

Hi,

Nova Del 2013 O210 24 September UT ~7.8 mag seeing and transparency above average. No moon. 12x36 IS II binoculars. No color noted at this magnification.

#166 John_G

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Posted 24 September 2013 - 09:40 PM

About 3 weeks since may last observation. My estimate tonight with my 90mm was 8.2 with comp stars 80 and 82, 9/25/13 at 2:00 UT. I didn't notice any red color that some have reported.

#167 Sasa

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Posted 25 September 2013 - 02:01 AM

My estimate from the same evening using 8x40 binoculars is the same:

9/25/2013 18:25UT V=8.2

BTW, here is the nova light curve based on my observations. One can clearly see a change in the trend:

Posted Image

#168 Rich (RLTYS)

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Posted 25 September 2013 - 05:24 AM

About 3 weeks since may last observation. My estimate tonight with my 90mm was 8.2 with comp stars 80 and 82, 9/25/13 at 2:00 UT. I didn't notice any red color that some have reported.


Observed N Del 2013 last evening (9/24) and estimated its mag at 8.0. I did take a good look at the nova with my 10" refl and at 38x I didn't see any color but when I increased magnification to 76x N Del took on a pale orange color.

Rich (RLTYS)

#169 Sasa

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Posted 26 September 2013 - 02:32 PM

Today I had a quick look at nova. It was between the clouds, but I had a feeling that it is much fainter than two days ago, may be the speed of fainting again changed. My estimate is

9/26/2013 18:55UT V=8.5

#170 John_G

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Posted 26 September 2013 - 09:48 PM

I had a look tonight with my 200mm. I didn't make an estimate but the color red was easy to see. As red as a lot of carbon stars I've seen.

#171 lamplight

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Posted 27 September 2013 - 12:46 AM

I noticed the red three days ago after not having seen it for a couple weeks. I was not expecting it, just was looking to do some practice magnitude evals (just starting, noob). Two nights ago when the seeing was not so good the outer red edge seemed far wider than the last two nights. I Get the sense, perhaps imagination, that the red is oozing into the black background.. Like its bigger than I can see. I wish I could see this through the Hubble or from somewhere free of atmosphere at higher magnification. I see a yellow white pinpoint center with this red surrounding it.. (All three nights in las 4 days). As I say, A couple of days ago the red part was larger, more visible. There was also more flicker so I'm not sure if it was just illusion.

#172 John_G

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Posted 03 October 2013 - 07:03 AM

I had a look last night with my 200mm. Still somewhat red in appearance but not as intense as my last observation. My estimate was magnitude 9.0 with comp stars 90 and 95 at 2:00 UT 10/3/13.

#173 Rich (RLTYS)

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Posted 04 October 2013 - 05:18 AM

Maybe this is old news but Nova Del 2013 finally has a designation, it's V339 Del.

Rich (RLTYS)

#174 canukLX90

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Posted 04 October 2013 - 04:42 PM

Image from the night of 03 October.
10 X 30 seconds at ISO 800 / modded Canon 450D / PowerNewt
at F 2.8 No processing other than RAW to TIFF conversion,
crop and stacking.

Still looks red but dimmer than my last posted image.

PJ

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#175 A. Viegas

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Posted 05 October 2013 - 11:58 AM

Here is an image from August 25th-- just to note the magnitude difference....

CPC1100 at ~F5.5 - Mallincam Xtreme 1 single 60 second exposure. No processing, just a screen capture.

Al

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