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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]> > ____________________________________________________________________ > > > > > > ---- > Starlink User Support list > For list configuration, including subscribing to and unsubscribing > from the list, see > https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARLINK > > > > > -- > -------------------------------------------- > 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]> > -------------------------------------------- > > ---- Starlink User Support list For list configuration, including > subscribing to and unsubscribing from the list, see > https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARLINK -- Dr Sarah Graves Scientific Programmer East Asian Observatory/JCMT [log in to unmask] ---- Starlink User Support list For list configuration, including subscribing to and unsubscribing from the list, see https://www.jiscmail.ac.uk/cgi-bin/webadmin?A0=STARLINK