Index of /ogle/ogle4/OCVS/gd/t2cep

[ICO]NameLast modifiedSizeDescription
[PARENTDIR]Parent Directory  -  
[ ]t2cep.dat2024-03-25 23:17 31K 
[TXT]remarks.txt2024-03-25 23:17 1.5K 
[DIR]phot/2019-07-02 15:53 -  
[ ]phot.tar.gz2024-03-26 13:04 422K 
[ ]pap2.pdf2020-08-11 01:48 1.9M 
[ ]pap1.pdf2018-12-21 14:42 1.0M 
[ ]ident.dat2024-03-24 17:04 31K 
[ ]gc.dat2020-07-20 00:59 91  
[DIR]fcharts/2024-03-26 13:03 -  
[TXT]README2024-03-25 23:52 4.9K 
=======================================================================

                  OGLE Collection of Galactic Cepheids

      A. Udalski, I. Soszynski, P. Pietrukowicz, M.K. Szymanski, 
     D.M. Skowron, J. Skowron, P. Mroz, R. Poleski, S. Kozlowski,
           K. Ulaczyk, K. Rybicki, P. Iwanek and M. Wrona

=======================================================================
udalski@astrouw.edu.pl

This directory contains the OGLE collection of type II Cepheids in
the Galactic disk fields.

The directory structure is as follows:

README            - this file

ident.dat         - identification of stars. Please note that all type
		    II Cepheid candidates: 
		    OGLE-GD-T2CEP-0001 - OGLE-GD-T2CEP-0006  
		    (Pietrukowicz et al. 2013) turned out to be
 		    spotted stars. Nevertheless we keep numbering
		    for historical reasons.

t2cep.dat         - parameters of type II Cepheids

phot/I/           - I-band photometry of individual objects
phot/V/           - V-band photometry of individual objects
phot.tar.gz       - gzipped phot/ directory

fcharts/          - finding charts of individual objects

remarks.txt       - remarks on selected objects

gc.dat            - objects located within one tidal radius of globular
                    clusters

pap1.pdf          - PDF version of the paper Udalski et al. (2018),
                    Acta Astron. 68, 315, (arXiv:1810.09489) describing
                    the collection

pap2.pdf          - PDF version of the paper Soszynski et al. (2020),
                    Acta Astron. 70, 101 (arXiv:2007.07255), describing
                    the extension of the collection.


Format of the file ident.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 18  A18   ---     Star's ID
 21- 25  A5    ---     Subtype of type II Cepheids
 28- 29  I2    h       Right ascension, equinox J2000.0 (hours)
 31- 32  I2    m       Right ascension, equinox J2000.0 (minutes)
 34- 38  F5.2  s       Right ascension, equinox J2000.0 (seconds)
     40  A1    ---     Declination, equinox J2000.0 (sign)
 41- 42  I2    deg     Declination, equinox J2000.0 (degrees)
 44- 45  I2    arcmin  Declination, equinox J2000.0 (arc minutes)
 47- 50  F4.1  arcsec  Declination, equinox J2000.0 (arc seconds)
 53- 68  A16   ---     OGLE-IV ID
 70- 84  A15   ---     OGLE-III ID
 86-100  A15   ---     OGLE-II ID
102-     A     ---     Other designation (from VSX)
--------------------------------------------------------------------------

Format of the file t2cep.dat:
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 18  A18   ---     Star's ID
 21- 26  F6.3  mag     Intensity mean I-band magnitude
 28- 33  F6.3  mag     Intensity mean V-band magnitude
 36- 45  F10.7 days    Period
 47- 55  F9.7  days    Uncertainty of period
 58- 69  F12.4 days    Time of maximum brightness (HJD)
 72- 76  F5.3  mag     I-band amplitude (maximum-minimum)
 79- 83  F5.3  ---     Fourier coefficient R_21
 85- 89  F5.3  ---     Fourier coefficient phi_21
 92- 96  F5.3  ---     Fourier coefficient R_31
 98-102  F5.3  ---     Fourier coefficient phi_31
--------------------------------------------------------------------------

Format of the files with photometry (phot/I/OGLE-GD-T2CEP-NNNN.dat,
phot/V/OGLE-GD-T2CEP-NNNN.dat)
--------------------------------------------------------------------------
 Bytes  Format Units   Description
--------------------------------------------------------------------------
  1- 13  F13.5 days    Heliocentric Julian Day
 15- 20  F6.3  mag     Magnitude
 22- 26  F5.3  mag     Uncertainty of magnitude
--------------------------------------------------------------------------


Finding charts are gzipped Postscript images. The names of the files are in
the form: ID.ps.gz. The finding charts are 60"x60" subframes of the I-band
reference frames centered on the star. White cross marks the star. North is
up and East to the left.


Any presentation of the scientific analysis or usage of the data from the
catalog of type II Cepheids in the Magellanic Clouds should include the
appropriate reference(s) to OGLE paper(s).


Updates:

2020-07-16  145 additional type II Cepheids (from OGLE-GD-T2CEP-0177 to
            OGLE-GD-T2CEP-0321; Soszynski et al. 2020, Acta Astron. 70, 101)

2022-08-20  14 additional type II Cepheids from the Gaia DR3 catalog and
            other sources (from OGLE-GD-T2CEP-0322 to OGLE-GD-T2CEP-0335)

2024-03-26  - Update of the OGLE-IV light curves with new data points
              collected until February 2024.
            - The observation epochs are now provided in the format of full
              Heliocentric Julian Days.
            - 12 stars have been reclassified as spotted variable stars and
              removed from the Collection.