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In_DESI code. about desimodel HOT 8 CLOSED

desihub avatar desihub commented on August 22, 2024
In_DESI code.

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Comments (8)

dkirkby avatar dkirkby commented on August 22, 2024

Is this a duplicate of #25?

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martinjameswhite avatar martinjameswhite commented on August 22, 2024

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rncahn avatar rncahn commented on August 22, 2024

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martinjameswhite avatar martinjameswhite commented on August 22, 2024

Bob,

A point is defined to be within the footprint if it is within 1.6 degrees of a tile center (as contained in the "official" FITS file). It does not mean that a fiber can actually reach it, or that the imaging will have sufficient depth, or it is far enough from the nearest bright star or whatever.

Martin.

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martinjameswhite avatar martinjameswhite commented on August 22, 2024

When we wrote the mock making code for BOSS (and when we implemented mksample for that matter) we defined in_survey to return not a boolean but rather an integer. This was modeled on the old Unix convention that returning 0 meant "success" and higher numbers indicated what went wrong -- for example not in the footprint, too close to a bright object, "scratches" in the imaging, etc. The code ran through a series of veto masks to populate this return value. I'm not sure whether there is interest in such a thing here, but I thought I'd raise the "issue".

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rainwoodman avatar rainwoodman commented on August 22, 2024

Martin, I imagine another function that combines the output of this and a variety of other functions (too close to a bright object, scratches in the imaging etc) into a bitmask. Stephen already has some sort of mask like this.

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dkirkby avatar dkirkby commented on August 22, 2024

I sent Stephen (and others) the notebook mentioned in #25 with the relevant code just before the OSU meeting, but we were all preoccupied with final checks on the end-to-end data challenge simulations. I will copy the relevant code to #37 today.

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sbailey avatar sbailey commented on August 22, 2024

Fixed via PR #37.

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