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...
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
> ____________________________________________________________________
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> STFC Rutherford Appleton Laboratory
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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
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> Dr Sarah Graves
> Scientific Programmer
> East Asian Observatory/JCMT
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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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