Doc: removed non-compliant characters in citation labels that would create...

~~~~~~

Fluxes may be expressed in linear (ADU) units or as Pogson

:cite:`1856MNRAS..17...12P` magnitudes. Flux measurements in ADUs

:cite:`1856MNRAS_17_12P` magnitudes. Flux measurements in ADUs

are prefixed with ``FLUX_``, for example: ``FLUX_AUTO``, ``FLUX_ISO``, etc.

Magnitudes are prefixed with ``MAG_`` e.g., ``MAG_AUTO``, ``MAG_ISO``, ... In

|SExtractor| the magnitude :math:`m` of a source is derived from the flux

  Measurements are given in pixel coordinates, in units of pixels. For example: ``Y_IMAGE``, ``ERRAWIN_IMAGE``, ``THETA_IMAGE`` etc. Following the FITS convention, in |SExtractor| the center of the first image pixel has coordinates (1.0,1.0). Position angles are counted from the *x* axis (axis 1), positive towards the *y* axis (axis 2)

_WORLD

  Measurements are given in so-called “world coordinates”. This requires World Coordinate System (|WCS|_) metadata :cite:`2002A&A...395.1061G` to be present in the FITS image header(s). Position angles are counted from the first world axis, positive towards the second world axis.

  Measurements are given in so-called “world coordinates”. This requires World Coordinate System (|WCS|_) metadata :cite:`2002AA_395_1061G` to be present in the FITS image header(s). Position angles are counted from the first world axis, positive towards the second world axis.

_SKY, _J2000, _B1950

  Measurements are given in celestial (equatorial) coordinates, in units of degrees. This requires celestial |WCS| metadata :cite:`2002A&A...395.1077C` to be present in the FITS image header(s). _SKY measurements are given in the native world coordinate system. _J2000 and _B1950 measurements are automatically converted from the native |WCS|, taking into account the change of reference frame. In all cases, positions angles are counted East-of-North.

  Measurements are given in celestial (equatorial) coordinates, in units of degrees. This requires celestial |WCS| metadata :cite:`2002AA_395_1077C` to be present in the FITS image header(s). _SKY measurements are given in the native world coordinate system. _J2000 and _B1950 measurements are automatically converted from the native |WCS|, taking into account the change of reference frame. In all cases, positions angles are counted East-of-North.

.. include:: keys.rst

intensity profiles of the faint objects recorded in the frame are

roughly Gaussian because of atmospheric blurring, then the fraction

:math:`\eta = \frac{I_{\rm iso}}{I_{\rm tot}}` of the total flux enclosed

within a particular isophote reads :cite:`1990MNRAS.246..433M`:

within a particular isophote reads :cite:`1990MNRAS_246_433M`:

.. math::

  :label: isocor

       - \sqrt{\left(\frac{\overline{x^2}-\overline{y^2}}{2}\right)^2 + \overline{xy}^2}.\end{aligned}

Note that A and B are exactly halves the :math:`a` and :math:`b`

parameters computed by the COSMOS image analyser :cite:`1980SPIE..264..208S`.

Actually, :math:`a` and :math:`b` are defined in :cite:`1980SPIE..264..208S`

parameters computed by the COSMOS image analyser :cite:`1980SPIE_264_208S`.

Actually, :math:`a` and :math:`b` are defined in :cite:`1980SPIE_264_208S`

as the semi-major and semi-minor axes of an elliptical shape with constant

surface brightness, which would have the same 2nd-order moments as the

analyzed object.

# There are two options for replacing |today|: either, you set today to some

# non-false value, then it is used:

#

today = 'Mon Nov 06 2017'

today = 'Wed Nov 22 2017'

#

# Else, today_fmt is used as the format for a strftime call.

#

@ARTICLE{1996A&AS..117..393B,

@ARTICLE{1996AAS_117_393B,

   author = {{Bertin}, E. and {Arnouts}, S.},

    title = "{SExtractor: Software for source extraction.}",

  journal = {A\&AS},

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@ARTICLE{2002A&A...395.1077C,

@ARTICLE{2002AA_395_1077C,

   author = {{Calabretta}, M.~R. and {Greisen}, E.~W.},

    title = "{Representations of celestial coordinates in FITS}",

  journal = {A\&A},

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@ARTICLE{2002A&A...395.1061G,

@ARTICLE{2002AA_395_1061G,

   author = {{Greisen}, E.~W. and {Calabretta}, M.~R.},

    title = "{Representations of world coordinates in FITS}",

  journal = {A\&A},

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@ARTICLE{1990MNRAS.246..433M,

@ARTICLE{1990MNRAS_246_433M,

   author = {{Maddox}, S.~J. and {Efstathiou}, G. and {Sutherland}, W.~J.

	},

    title = "{The APM Galaxy Survey - Part Two - Photometric Corrections}",

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@ARTICLE{1856MNRAS..17...12P,

@ARTICLE{1856MNRAS_17_12P,

   author = {{Pogson}, N.},

    title = "{Magnitudes of Thirty-six of the Minor Planets for the first day of each month 

of the year 1857}",

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@INPROCEEDINGS{2002ASPC..281..228B,

@INPROCEEDINGS{2002ASPC_281_228B,

   author = {{Bertin}, E. and {Mellier}, Y. and {Radovich}, M. and {Missonnier}, G. and 

	{Didelon}, P. and {Morin}, B.},

    title = "{The TERAPIX Pipeline}",

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@INPROCEEDINGS{2006ASPC..351..112B,

@INPROCEEDINGS{2006ASPC_351_112B,

   author = {{Bertin}, E.},

    title = "{Automatic Astrometric and Photometric Calibration with SCAMP}",

booktitle = {Astronomical Data Analysis Software and Systems XV},

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@INPROCEEDINGS{2004ASPC..314..551C,

@INPROCEEDINGS{2004ASPC_314_551C,

   author = {{Calabretta}, M.~R. and {Valdes}, F. and {Greisen}, E.~W. and 

	{Allen}, S.~L.},

    title = "{Representations of distortions in FITS world coordinate systems}",

  adsnote = {Provided by the SAO/NASA Astrophysics Data System}

}

@INPROCEEDINGS{1980SPIE..264..208S,

@INPROCEEDINGS{1980SPIE_264_208S,

   author = {{Stobie}, R.~S.},

    title = "{Application of moments to the analysis of panoramic astronomical photographs}",

 keywords = {Astronomical Photography, Classifications, Image Processing, Imaging Techniques, Moments, Accuracy, Computer Techniques, Photographs},