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J/PAZh/36/144       JHKLM photometry of 3 RV Tau supergiants (Taranova+, 2010)
Infrared photometry for three RV Tau variable stars.
    Taranova O.G., Shenavrin V.I., Tatarnikov A.M.
    <Pis'ma Astron. Zh. 36, 144 (2010)>
    =2010PAZh...36..144T
    =2010AstL...36..134T
ADC_Keywords: Stars, variable ; Stars, supergiant ; Photometry, infrared

Keywords: RV Tau variable stars - infrared photometry - variability -
          dust shells

Abstract:
    We have analyzed our long-term (1995-2008) JHKLM photometry for
    three variable RV Tau supergiants. It follows from this analysis that:
    the amplitude of the JHK brightness variations is approximately the
    same, 0.9-1mag, for the three stars; a negative linear trend is
    noticeable in the variations of the mean J brightness for AC Her; and
    the mean J brightness of R Sct and V Vul remained constant. The
    observed J brightness fluctuations in the supergiants are shown to be
    consistent either only with the temperature pulsations (AC Her and
    V Vul) or with the temperature and radial pulsations (R Sct).
Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    18 30 16.2   +21 52 01   AC Her = V* AC Her
    18 47 29.0   -05 42 19   R Sct = V* R Sct
    20 36 32.0   +26 36 15   V Vul = V* V Vul
    ----------------------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        53      147   Infrared photometry for the objects under study


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  6  A6    ---     Name      Star name
   8- 18  F11.3 d       JD        Julian date
  20- 23  F4.2  mag     Jmag      J magnitude
  25- 28  F4.2  mag     Hmag      ?=- H magnitude
  30- 33  F4.2  mag     Kmag      ?=- K magnitude
  35- 38  F4.2  mag     Lmag      ?=- L magnitude
  40- 43  F4.2  mag     e_Lmag    ?=- rms uncertainty on Lmag
  45- 48  F4.2  mag     Mmag      ?=- M magnitude
  50- 53  F4.2  mag     e_Mmag    ?=- rms uncertainty on Mmag


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    15-Mar-2010