2 additional candidates B in emmission

2 additional candidates B in emmission

Postby Thierry Lemoult » Sun Sep 28, 2014 1:41 pm

Hello
I just take a look at 64 B star obsrved this night and i find two new candidate:
HD 16485
HD 34906

And also, find a mistake in spectral classification... BD+59 205 suppose to be a B1V according CDS Simbad but i find a spectral type look like "M4V star"
I control the guiding image, make a astrometrie, that the good astrometric position at 0.5 arsec.. And so so bright star in the region.

Regards
Thierry Lemoult
Attachments
_bd+59205_20140927_823_Thierry Lemoult.png
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_hd34906_20140928_156_Thierry Lemoult.png
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Thierry Lemoult
 
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Re: 2 additional candidates B in emmission

Postby Robin Leadbeater » Sun Sep 28, 2014 4:59 pm

Thierry Lemoult wrote:
And also, find a mistake in spectral classification... BD+59 205 suppose to be a B1V according CDS Simbad but i find a spectral type look like "M4V star"
I control the guiding image, make a astrometrie, that the good astrometric position at 0.5 arsec.. And so so bright star in the region.


That is Interesting Thierry,

Skiff's database
http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=B/mk
has 2 old references from 1959/1960 for this star. Both suggest a hot star (OB- and B2)
Has something happened to it?
Does the brightness look right in your spectrum? ( V mag 10.6 B mag 10.8 according to the Skiff reference )

Cheers
Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: 2 additional candidates B in emmission

Postby Robin Leadbeater » Sun Sep 28, 2014 5:16 pm

This paper from 1954 however lists BD+59 205 as a type N carbon star, magnitude 10.4
http://cdsads.u-strasbg.fr/cgi-bin/nph- ... .120..129N
number 43 in table 1b

Robin
LHIRES III #29 ATIK314 ALPY 600/200 ATIK428 Star Analyser 100/200 C11 EQ6
http://www.threehillsobservatory.co.uk
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Re: 2 additional candidates B in emmission

Postby Thierry Lemoult » Sun Sep 28, 2014 9:10 pm

Thanks Robin, i took a unfiltered picture with my electronic finder, i think i could use it for a estimation of the V magnitude.
I will do this tomorrow.
One thing sure, is the field, that the correct star in the slit.
Regards
Thierry Lemoult
 
Posts: 136
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Re: 2 additional candidates B in emmission

Postby Thierry Lemoult » Mon Sep 29, 2014 8:33 pm

I check the photometry of star BD+59 205 according the field camera. The unfiltere magnitude is about 10.8 +/-0.2
So that consistant with published photometry.
Thierry Lemoult
 
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Re: 2 additional candidates B in emmission

Postby Christian Buil » Fri Oct 03, 2014 4:49 pm

Thierry, a HR spectrum of HD16485 (double peak emission)
(C11 + VHIRES (7 x 600 sec expo.):

Image

Christian
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Re: 2 additional candidates B in emmission

Postby Thierry Lemoult » Sun Oct 05, 2014 9:08 pm

Nice Christian ! I will integrate this spectrum to the ARAS web page here: http://www.astrosurf.com/aras/be_candidate/auto-be-candidate.html as soon has you send me the fits file.
Thierry Lemoult
 
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Re: 2 additional candidates B in emmission

Postby Christian Buil » Mon Oct 06, 2014 4:47 pm

C'est fait Thierry, et direct link from ARAS index page added!

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