On Wed, 13 Feb 2008, Colin Aspin wrote:
> Ah, maybe. It depends on whether you interpret "Low index" as pixels or
> channels I guess.
Hi Colin,
thanks for the report. Yes, it is an issue to do with having the sense of
the spectral coordinates different to the pixel coordinates. I've fixed
GAIA so that this will work as you expect (and classed this as a bug since
it is counter-intuitive, although things still work).
Cheers,
Peter.
> On Feb 13, 2008, at 9:10 AM, Tim Jenness wrote:
>
>> Are you sure this isn't because the pixel coordinates are in the opposite
>> direction to the world coordinates?
>>
>> Tim
>>
>> On Feb 13, 2008 8:02 AM, Colin Aspin <[log in to unmask]> wrote:
>> Hi All,
>>
>> I'm using gaia and some datacubes (HARP-B and UIST IFU) and I've seen
>> strange behaviour for both when using the "Spectrum" tab. If I click
>> on the image and extract a spectrum and then click the "Show limits on
>> plot" button, I get the orange limit lines on the plot fine. However,
>> if I drag the extremes to the location I want (towards the center) I
>> can extract a new spectrum OK but the limits shown in pixels on the
>> window are the wrong way around, the lower limit has the higher number
>> and the higher limit has the lower number. If I then use the slidebars
>> to move the limits I have to move the lower- limit slidebar away from
>> the center to get the limit lines to move towards the center and
>> visa-versa for the upper slidebar. I am using humu but this was also
>> the case with puana and whatever came before (just never bothered to
>> report it). See attached screen grab for evidence where the
>> lower-limit says 86 and the upper limit says 70.
--
Peter W. Draper, http://astro.dur.ac.uk/~pdraper
|