A novel spectrum? :)

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  • #574305
    Kevin Gurney
    Participant

    I am currently revisiting the Alpy600 and seeing how deep I can go. The exercise is currently at mag 12 with EF Cep attached (and image insert). However, I cannot see a spectral classification for this star in Simbad or Skiff. I can’t believe I am the first person to take this one! I have followed a couple of the references in Simbad to various catalogues to no avail. Mine looks around class F I believe…

    Anyone come across this one before?

    Incidentally, the spectrum is filtered with parameter ‘4’ in Bass. I am going to try binning 2×2 (at least) on my 460EX with these fainter stars to see if I can improve SNR (certainly works with Lhires…)

    Kevin

    #580962
    Kevin Gurney
    Participant

    Apologies for double image upload – I thought it had missed it and I repeated – can’t seem to delete one.

    Kevin

    #580984
    Jack Martin
    Participant

    Kevin,

    HD43378 is listed as 2 Lyn an eclipsing binary spectral type A2Vs C;

    http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=2+Lyn

    Also listed on p.133 + 353 as A2 V Starlist 2000 a handy reference book by Richard Dibon-Smith.

    HTH,

    Jack

    Essex UK

     

    #580987
    Robin Leadbeater
    Participant

    Hello Jack,

    I think the HD43378 in the filename refers to the reference star used (a MILES star). The spectrum is of EF Cep which does not even appear in Brian Skiff’s huge database of published spectral types so yes this might well be the first published spectrum of this star.

    Cheers

    Robin

    #580988
    Robin Leadbeater
    Participant

    According to VSX, EF Cep is an eclipsing variable type W Uma with a period of 0.606072d which if Wikipedia is correct makes it a type A and should consist of two stars of type A-F  which from the look of the spectrum I would say is correct. (A quick overlay of Pickles spectra suggests a type F2iii is a pretty good match for example)

    Robin

    #580998
    Kevin Gurney
    Participant

    Sorry about recent absence from forum as we are in France and have just got reliable wifi.

    Hagh! so maybe an original item…

    Robin is right, I tend to put any reference stars in the  filename… Sorry about confusion.

    Kevin

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