On Mon, 13 Apr 2015, Peter W. Draper wrote:
> On Mon, 13 Apr 2015, R Morris wrote:
>
>> Dear Sarah,
>> Yes, that was it, adding a zero to 'Max Objects' to make it 20 000 and
>> hitting return plotted all the objects.
>>
>> Can you tell me how to change this variable system-wide? It is different
>> behaviour to 2014A which appears to set the Max Objects to the number of
>> objects detected.
>>
>> Thanks for your help,
>
> Hi Rhys,
>
> this isn't a user configurable quantity, so I must have broken something when
> I updated to the latest SExtractor for this release. I'll have a look
> when I find a moment...
Seems that the output from SExtractor was changed slightly so I no longer
set the number of objects detected correctly. Get the following file:
https://raw.githubusercontent.com/Starlink/starlink/06c1c987bfce9aa949795bd5b0638b160389d567/applications/gaia/gaia/library/GaiaSextractor.tcl
and use it to replace "/star-2015A/lib/gaia4.4.6/GaiaSextractor.tcl".
Cheers,
Peter.
>
>>
>> On 11 April 2015 at 04:11, Sarah Graves <[log in to unmask]> wrote:
>> They haven't just left the 'Max Objects' option on the plotting
>> window at the default value of
>> 2000 have they? Gaia won't plot any more objects than that until you
>> manually change the option
>> on the plotting window.
>>
>> If I run the Object detection with the default settings (1.5rms), I
>> get a very similar looking
>> image to your user, with detections on only half the map.
>>
>> If I then go to the Gaia Catalog plotting window and change the Max
>> Objects from 2000 to 20000 I
>> discover that there are in fact 7767 objects and I can now see all of
>> them.
>>
>> Hope that helps,
>>
>> Sarah
>>
>>
>> R Morris wrote:
>> Hi Pat,
>>
>> I know that bug!
>> In this case the image southernmost point is -1:22:40 and
>> northernmost
>> point is -1:18:08 so I don't this is the problem here.
>>
>> The image is here if anyone would like to try and reproduce the
>> problem.
>>
>> ftp://ftp.star.bris.ac.uk/pub/rahm/HST_MOS_5136_ACS_WFC_F625W_drz.fits
>>
>> It is 385Mb
>>
>> regards,
>> Rhys
>>
>> On 10 April 2015 at 15:34, <[log in to unmask]
>> <mailto:[log in to unmask]>> wrote:
>>
>> Rhys said:
>>
>> > After upgrading from 2014A to 2015A, one of my users
>> reports that
>> > the sextractor version that comes with gaia only
>> searches half his
>> > image, see the image below.
>>
>> This isn't the dreaded minus zero bug is it? Something in
>> the chain
>> is reading declination as a string #nn nn nn.n, decoding
>> three
>> numbers and testing the first for sign. But if nn=0, the
>> sign gets
>> lost, and all the sources between 0 and -1 get folded into
>> the
>> region between 0 and +1.
>>
>>
>> Patrick Wallace
>>
>> ____________________________________________________________________
>> RAL Space +44-1235-531198 <tel:%2B44-1235-531198>
>> STFC Rutherford Appleton Laboratory
>> Harwell Oxford
>> Didcot, Oxfordshire, OX11 0QX, UK
>> [log in to unmask]
>> <mailto:[log in to unmask]>
>>
>> ____________________________________________________________________
>>
>>
>>
>>
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>>
>> --
>> --------------------------------------------
>> Rhys Morris
>> Bristol Astrophysics Group and
>> Zone D, Astrophysics/Unix Support Specialist
>> Room 4.13, HH Wills Physics Lab
>> University of Bristol
>> Telephone: 0117 331 4239
>> [log in to unmask] <mailto:[log in to unmask]>
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>> --
>> Dr Sarah Graves
>> Scientific Programmer
>> East Asian Observatory/JCMT
>> [log in to unmask]
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>>
>>
>>
>> --
>> --------------------------------------------
>> Rhys Morris
>> Bristol Astrophysics Group and
>> Zone D, Astrophysics/Unix Support Specialist
>> Room 4.13, HH Wills Physics Lab
>> University of Bristol
>> Telephone: 0117 331 4239
>> [log in to unmask]
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>>
>
> --
> Peter W. Draper, http://astro.dur.ac.uk/~pdraper
>
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Peter W. Draper, http://astro.dur.ac.uk/~pdraper
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