Type Ia spectral classification

From: clidman (clidman@eso.org)
Date: Wed Apr 23 2003 - 15:59:12 PDT

  • Next message: Alex Conley: "INT identification"

    Hi Rob,
       I am sorry about the delay in this reply. I've just come down from a shift on Paranal.

       I reviewed the spectra that were taken at ESO telescopes with your comments about
    spectral classification on page 4 in mind.

    In regards to the classification

    SN z Ia SiII (6300) Instrument + Telescope
    ========================================================
    1998as 0.355 Yes Yes EFOSCII + ESO3.6
    1998ax 0.497 Yes Yes EFOSCII + ESO3.6
    1998ba 0.43 Yes No EFOSCII + ESO3.6
    2000fr 0.543 Yes No FORS1 + Antu (VLT-UT1)
    ========================================================

    1998ba: The redshift is based on the SNe. There were no lines from the host, but there
    was a nearby galaxy with z=0.393. It is interesting to note that this SN is not reddened even
    though we are looking through the halo of a galaxy that is along the line of sight. The SiII (6300)
    dip is not seen, although it is in a noisy part of the spectrum.

    2000fr. The SiII dip lies off the edge of the VLT spectrum.

    I have two additional comments about the paper.

    You give a redshift of 0.0135 as the boundry defining the Hublle flow. This is a bit
    precise. Perhaps z > 0.01 is sufficient.

    In table 30, NTTA should be NTT. You may want to specify the instrument as wee, which was SUSI2
    in this case.

    Cheers, Chris.



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