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Carbon stars in Right Ascension order

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#1 flt158

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Posted 25 March 2020 - 11:03 AM

Hello everyone. 

 

A great man called Eric (Cildarith) issued here on Cloudy Nights in the Observational Astrophysics Forum a list of 2343 Carbon stars brighter than Mag. 13 to me personally.

The list was originally posted on 15th April 2019 under the heading  "26 carbon stars in Andromeda" and it is from Simbad. 

Please check it out. 

As a result, I have been going through it line by line and page by page.  

But it lasts a whacking 24 pages. 

Many of the carbon stars cannot be observed from my home town of Dublin, Ireland - such as those found over southern hemisphere skies. 

But what I have been doing up to now is picking a certain constellation such as Andromeda, Bootes, Cassiopeia and, more recently, Cancer. 

I then work out the the right ascensions and declinations of such constellations.  

I then go through this large list to discover what carbon stars are contained in such constellations page by page. 

That's quite ponderous I'm sure you agree. 

The RA's are not all in order. 

 

What I would like to do is to revise the list. 

And also, very importantly, to rearrange them in order of Right Ascension (RA). 

 

Can anyone help me out?

I would greatly appreciate your help. 

 

Thank you very much. 

 

If it can't be done, I will just have to continue with the way the original list has been done. 

 

Kind regards, 

 

Aubrey.  

 

 


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#2 eyeoftexas

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Posted 25 March 2020 - 11:32 AM

Hi Aubrey.  I logged on to the Simbad website with the list.  You can click on any of the column headers and the list is re-arranged in either ascending or decending order, depending on your choice.  You could rearrange the list in RA, and then go to the output option and have it downloaded as an ASCII file (tab-delineated txt) and then import that into Excel.  You would then have the database to insert new stars.


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#3 beggarly

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Posted 25 March 2020 - 05:05 PM

It's really easy. In SIMBAD http://simbad.u-strasbg.fr/simbad/ select 'Queries' - 'by criteria'. On that page select 'Output options'.

 

 

Query by criteria.jpg

 

Select an 'Output format' and some parameters under 'list display' that you want in the file. When you're satisfied 'SAVE' the options and return to the previous page.Select 'display' under 'Return:'

Enter a search expression: otype = 'Carbon Star' & Vmag <= 13 and 'Submit query'

 

This is the ouput file: Attached File  simbad.csv   185.56KB   5 downloads I removed the header because it interferes when you sort the data.

 

Import in your favorite spreadsheet and sort: Edit wrong file, here's a new version: Attached File  simbad.ods   133.28KB   18 downloads


Edited by beggarly, 26 March 2020 - 08:21 AM.

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#4 flt158

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Posted 25 March 2020 - 06:42 PM

I reckon this is going to work, Beggarly and Eye of Texas. 

 

Thank you very much. 

 

Kind regards, 

 

Aubrey. 



#5 The Ardent

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Posted 25 March 2020 - 06:44 PM

Unleash the Kraken Carbon !


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#6 flt158

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Posted 28 March 2020 - 04:18 PM

My deepest thanks to you, Beggarly, and to others who are encouraging yours truly. 

 

I downloaded your simbad.ods. Beggarly 

For 6 solid periods (over 2 days) I whittled down the number of carbon stars which I could observe from Dublin, Ireland with my William Optics 158 mm apochromatic refractor. 

It does not have GoTo. 

But I do enjoy starhopping.  

 

Of course many of these carbon stars have a lowly declination below -30. 

But I have not deleted them.

I may at some time in the future. 

 

Constellations such as the bottom two thirds of Eridanus, Puppis, Caelum, Columba, Antlia, Fornax, Pyxis and Sculptor I don't expect to observe at all unless I do get the lowest possible southern horizon. 

Carbon stars between +12 and +13 magnitude are very doubtful too - unless they are reasonably high in the sky. 

 

Thankfully I discovered that my Guide 9.1 DVD points out the ones which do not appear above the southerly horizon. How handy!

So these I have deleted of course. 

My lowest available carbon star is WRAY 18-58. 

Its declination is -37 03 49. 

Somehow I cannot imagine seeing it from Ireland. 

 

Therefore I can now announce to everyone that there are 1629 carbon stars waiting to be observed from Dublin, Ireland. 

This is a huge number. I've only observed a paltry 85. 

 

Clear skies from Aubrey. 


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#7 Rich (RLTYS)

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Posted 29 March 2020 - 09:34 AM

You've got your work cutout for you, good luck.waytogo.gif


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#8 flt158

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Posted 29 March 2020 - 09:50 AM

You've got your work cutout for you, good luck.waytogo.gif

Thank you very much, Rich.

I'm just wondering. 

How many carbon stars have you observed?

And I'm not seeking one-upmanship. 

Definitely not. 

Perhaps you don't keep a record (?)

By the way, your telescopes are extremely admirable.  

 

I long to observe 100 carbon stars. 

 

Kind regards from Aubrey. 



#9 Rich (RLTYS)

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Posted 30 March 2020 - 04:55 PM

I did complete the AL Carbon Star Program which included 100 carbon stars. It was a lot of fun, you should check it out.


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#10 flt158

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Posted 30 March 2020 - 05:34 PM

Oh Yes, Rich. 

You did mention that Al Carbon Star Program to me before. 

But I didn't realise you had completed it. 

Splendid job! 

Here's a Dalek applause for you. dalek12.gif   

I use to be a Dr. Who fan. 

 

Kind regards, 

 

Aubrey. 




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