Ken,
this zip file has my eta carina spc file. The image was taken on the 30th Jan.
I've also included some spc files of Be stars in Puppis, HD57150 + HD68980. There is also a file labelled TYC7115-03011, also in Puppis. TYC7115 is at RA 7h 18m 32s DEC -36deg 46' 11"
The reason I've included the Tycho star is the unusual emission line around about 4500 ang. I did a search and there doesn't appear to be a background star interfering with the spectra, but I'm probably wrong.
The stars were selected from the ArasBeam website listing.
I'd be interested in your comments.
cheers
Mark
Last edited by Heian; 24-02-2009 at 07:58 PM.
Reason: adding position of star
In Kaler's book "Stars" he gives some interesting, annotated spectra.
P Cyn is thought to be similar to Eta Car.
There's also a diagram of the various strengths of the element lines across the H-R diagram; useful to "first-guess" which elements may be in a star spectra.
I just checked the catalogue of Quasars in AstroPlanner.....
There's over 146,000 listed!!!
I can do a list of southern ones, but will probably have to limit the magnitude (!!??) to come up with a reasonable list.
Watch this space..
OK this is a list of the top 20 south of +10 deg. Magnitudes are around +13mag!!!!
Last edited by Merlin66; 25-02-2009 at 08:19 PM.
Reason: Added data
Thanks Merlin,
This is my first feeble attempt at a quasar.
I hope you can see the faint spectra indicated by the red line.
I had trouble with bright spec from outside each side of the field, the target spectra was just above it. Also interfered by lots of faint background stars. However, in the original I can see absorption lines in the left portion of the spec.
The origional image is from 3x10min through the 4"-darks.
The graph is at 12.45A/Pix from other image scales and the zero image is on the extreem left, no camera balance -raw image.
IRAS 09149-6206 Mag ~13.
Before I start I should make you aware of the following references: www.etacarinae.iag.usp.br/ www.espacioprofundo.com.ar/foros/about8064.html
The first shows the movements of the HeII (4686) and N+(5755), the second a SA spectra of the 12 Feb.
Just started on Mark's "eta carinae spectra crop.spc"- #1 [BLUE] and Jeff's "ecara.spc" -#2 [RED] and straight away you can see similarities and some ( significant?) differences!!
#1 has a double Ha peak, were #2 is single
A second peak at 6876 on #1 is missing on #2
Neither of these match the foros spectra which has a large "ramp" up to the Ha and seems to have a line "reversal" at around 4860.
let the fun begin....................
Last edited by Merlin66; 26-02-2009 at 04:04 AM.
Reason: add names+foros spectra
All,
thanks for the links to the other websites Ken, there has certainly been some major changes in parts of the spectra.
Regarding the differences between Jeff's spectra and mine, perhaps it's the skyglow I image through in suburban Wollongong compared to Coonabarabran! Overall, they are very similar in shape and the size of the responses.
Comparing the spectra from the website and my resolution (11A/px), the changes he shows from 4660 to 4720 A, cover 5 pixels on my ccd.
If the sky clears tonight, I might try with the unmodded 350D, as I can get down to 2.5A/px with 135mm lens + 2x teleconverter.
Guys,
Through the Staranalyser forum, Robin has re-worked the "foros" spectra and found differences to the original posted. It looks like the spectra may have been incorrectly processed. The latest one looks more like Mark/Jeff/Al's versions. I'll post it when I can extract the graphic.
Ken,
I saw the messages as well as the reworked spectra that Robin did. It looked like it was the raw spectrum, and not instrument corrected. To do a comparison, would you need the raw, unprocessed spectra as well??
I took a spectra of eta car on 27th Feb and have processed it with Marks spectra. The 2 spectra are attached. Mine was taken with a ST9E at 31.6A/pixel.
They are quite similar.
I took a spectra of eta car on 27th Feb and have processed it with Marks spectra. The 2 spectra are attached. Mine was taken with a ST9E at 31.6A/pixel.
They are quite similar.
Cool! Clouds and visitors have been conspiring against me
I took a spectra of eta car on 27th Feb and have processed it with Marks spectra. The 2 spectra are attached. Mine was taken with a ST9E at 31.6A/pixel.
They are quite similar.
Looks good Terry.
It would be interesting to see a direct plot of your plot and mine. There seems to be some large difference around 5000A.
Like Al, I've similar prob's with the weather. I wish it would at least rain out of this bloody cloud.
They do look good Terry. I'm guessing you resampled my spectra at the 31A/px resolution?? I must learn how to do that.
I was all set up to get a spectra from Lulin, on fri night, managed to get one just as the cloud rolled back in again What I obtained was unusable, but there was a spectra, so it can be done
They do look good Terry. I'm guessing you resampled my spectra at the 31A/px resolution?? I must learn how to do that.
I was all set up to get a spectra from Lulin, on fri night, managed to get one just as the cloud rolled back in again What I obtained was unusable, but there was a spectra, so it can be done
To put you spectra on mine is easy. I just open both plots at once. I highlighted your plot and copied it. There is a button on the task bar. I then simply paste it into my plot. It is automagically resampled.
I took a spectrum of lulin on the same night but it was crap.
Christian Buil's was taken with a slit. With a slitless spectrum light we are using it was just smeared out and had no discernable features.
What I obtained was unusable, but there was a spectra, so it can be done
