J/A+A/584/A62 SUDARE VST-OmegaCAM search supernova rates (Cappellaro+, 2015)
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Supernova rates from the SUDARE VST-OmegaCAM search. I. Rates per unit volume.
    Cappellaro E., Botticella M.T., Pignata G., Grado A., Greggio L.,
    Limatola L., Vaccari M., Baruffolo A., Benetti S., Bufano F.,
    Capaccioli M., Cascone E., Covone G., De Cicco D., Falocco S.,
    Della Valle M., Jarvis M., Marchetti L., Napolitano N.R., Paolillo M.,
    Pastorello A., Radovich M., Schipani P., Spiro S., Tomasella L., Turatto M.
   <Astron. Astrophys., 584, A62-62 (2015)>
   =2015A&A...584A..62C    (SIMBAD/NED BibCode)
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ADC_Keywords: Surveys ; Supernovae ; Redshifts
Keywords: supernovae: general - galaxies: star formation -
          Galaxy: stellar content - surveys

Abstract:
    We describe the observing strategy, data reduction tools, and early
    results of a supernova (SN) search project, named SUDARE, conducted
    with the ESO VST telescope, which is aimed at measuring the rate of
    the different types of SNe in the redshift range 0.2<z<0.8. The search
    was performed in two of the best studied extragalactic fields, CDFS
    and COSMOS, for which a wealth of ancillary data are available in the
    literature or in public archives. We developed a pipeline for the data
    reduction and rapid identification of transients. As a result of the
    frequent monitoring of the two selected fields, we obtained light
    curve and colour information for the transients sources that were used
    to select and classify SNe by means of an especially developed tool.
    To accurately characterise the surveyed stellar population, we exploit
    public data and our own observations to measure the galaxy photometric
    redshifts and rest frame colours. We obtained a final sample of 117
    SNe, most of which are SN Ia (57%) with the remaining ones being core
    collapse events, of which 44% are type II, 22% type IIn and 34% type
    Ib/c. To link the transients, we built a catalogue of ~1.3x10^5^
    galaxies in the redshift range 0<z<=1, with a limiting magnitude
    K_AB_=23.5mag. We measured the SN rate per unit volume for SN Ia and
    core collapse SNe in different bins of redshifts. The values are
    consistent with other measurements from the literature. The dispersion
    of the rate measurements for SNe-Ia is comparable to the scatter of
    the theoretical tracks for single degenerate (SD) and double
    degenerate (DD) binary systems models, therefore it is not possible to
    disentangle among the two different progenitor scenarios. However,
    among the three tested models (SD and the two flavours of DD that
    either have a steep DDC or a wide DDW delay time distribution), the SD
    appears to give a better fit across the whole redshift range, whereas
    the DDC better matches the steep rise up to redshift ~1.2. The DDW
    instead appears to be less favoured. Unlike recent claims, the core
    collapse SN rate is fully consistent with the prediction that is based
    on recent estimates of star formation history and standard progenitor
    mass range.

Description:
    The SUDARE SN survey was performed using the VLT Survey Telescope
    (VST) equipped with the OmegaCAM camera, that started regular
    operations in October 2011 at ESO Paranal (Chile). The VST has a
    primary mirror of 2.6m and a f/5.5 modified Ritchey-Chretien optical
    layout that is designed to deliver a large, uniform focal plane.

    SUDARE is a four-year programme and this paper is devoted to analysing
    the first two observing seasons for VOICE-CDFS and one season for
    COSMOS. We are currently completing the monitoring of both fields for
    the two subsequent seasons.

File Summary:
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 FileName      Lrecl  Records   Explanations
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ReadMe            80        .   This file
tablea2.dat      138      117   List of supernovae
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Byte-by-byte Description of file: tablea2.dat
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   Bytes Format Units   Label     Explanations
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   1- 31  A31   ---     Name      SN designation
  33- 34  I2    h       RAh       Right ascension (J2000)
  36- 37  I2    min     RAm       Right ascension (J2000)
  39- 42  F4.1  s       RAs       Right ascension (J2000)
      44  A1    ---     DE-       Declination sign (J2000)
  45- 46  I2    deg     DEd       Declination (J2000)
  48- 49  I2    arcmin  DEm       Declination (J2000)
  51- 54  F4.1  arcsec  DEs       Declination (J2000)
  56- 59  F4.2  ---     zhost     ? Host galaxy redshift
  61- 64  F4.2  ---   e_zhost     ? Error on zhost (95% lower value)
                                     for photometric redshift
  66- 69  F4.2  ---   E_zhost     ? Error on zhost (95% upper value)
                                     for photometric redshift
  72- 78  A7    ---   n_zhost     Method of redshift measurement
  80- 83  A4    ---     Type      Most probable SN type
  85- 88  F4.2  ---     PType     Bayesian probability for Type
  90- 95  A6    ---     Temp      Best fitting template
  97-100  F4.2  ---     zSN       SN redshift
 102-105  F4.1  mag     AV        Extinction
 108-111  F4.1  ---     Dmu       Flux scaling
 113-117  I5    d       Tmax      Epoch of maximum (MJD)
 119-121  F3.1  ---     chi2n     {chi}^2^_n_ value
 123-124  I2    ---     Npt       Number of photometric measurements
 126-127  I2    ---     Npt2      Number of measurements with S/N ratio >2
 129-133  E5.1  ---     Pchi2     Integrated right tail probability of the
                                   {chi}^2^ distribution
 135-138  A4    ---     Notes     Notes (1)
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Note (1): Notes as follows:
  PSN = Probable SNe (see text)
    a = SN 2012ez
    b = SN 2012fa (IAUC, 3236)
    c = SN 2012fn
    d = SN 2012fp
    e = SN 2012fq
    f = SN 2012fo (IAUC, 3274)
    g = SN 2012gu
    h = SN 2012gs
    i = SN 2012gv
    j = SN 2012gt (IAUC, 3311)
    * = Host galaxy redshift obtained in this program
   ** = SN type revised: based only on spectrum was classified as Ic
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History:
    From electronic version of the journal

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(End)                                      Patricia Vannier [CDS]    27-Jan-2016