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## Bug #1416

open

### Cross-match contrast is high when processed alone, and very low when processed with other files

Status:
New
Priority:
Normal
Start date:
06/11/2020
Due date:
% Done:

0%

Estimated time:

Description

In some case for DECam catalogues I noticed that the cross match contrast with Gaia DR2 is very high when I process the file alone, but very low when I process it with other files.

Actions #1

#### Updated by Herve Bouyabout 2 years ago

A set of files showing this behaviour is available on morpho in /raid/hbouy/debug_scamp/1416

Actions #2

#### Updated by Herve Bouyabout 2 years ago

In the dataset, you can see that file ct4m20170516t004358-V4.1-ooi.cat has a contrast of 3.76 when scamped with the rest, and 78.2 when processed alone.

This is with scamp v2.9.2

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