[AstroPy] Montage_wrapper

Aniello Grado aniello.grado at gmail.com
Thu Apr 23 00:54:50 EDT 2015

Why you don't use SWarp?


On Thu, Apr 23, 2015 at 1:57 AM, Akshat Singhal <akshat.singhal014 at gmail.com
> wrote:

> Sir/Ma'am,
> I am using Montage and Montage_wrapper in astropy to co-add large set of
> CRTS (Catalina Real-Time Transient Survey) images of different area of sky
> for my project.
> We wished to co-add all the images which overlap with certain region in
> the sky (which is roughly 100s of images). We realized that to create a
> mosaic (co-adding) of all those 100s of images combining all at once is a
> slower  process compare to combining few at once independently and then
> again combining the resulted mosaic and so on.
> What we noticed that when we co-add images which have no overlap with each
> other (although have partial overlap with the region in sky), the montage
> either returns a blank image or goes into infinite loop and eat up the
> entire RAM. The likelihood of this event increases if the region of sky is
> large and/or the number of images co-added at a time are less.
> We couldn't figure out a way to fix this. Is there a possibility that when
> given 2 non-overlapping images, montage recognize that it is the case and
> avoid going to the infinite loop or simply stitch together those images.
> Any insight would be a great help. If I failed to explain anything ,please
> let me know
> -Akshat Singhal
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Aniello Grado, PhD

Ricercatore Astronomo
INAF- Osservatorio Astronomico di Capodimonte
Via Moiariello 16 80131 Napoli
Tel: 0039 0815575547
Fax: 0039 0815575433

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