9. Submitting the mask designs

Once the ODFs have been created and verified, you submit the ODF FITS to Gemini by means of the Observing Tool for double-checking and final cutting.

9.1. Standard naming convention for ODFs

The standard naming convention when submitting a mask is as follows:


North or South




Semester (A or B)


Q (Normal Queue Programs), LP (Large and Long Programs), DD (Director’s Discretionary Time), FT (Fast Turnaround)


Your program number


The mask number


  • GS2015AQ023-01_ODF.fits: Regular queue program at Gemini South, mask 01

  • GN2014BLP001-04_ODF.fits: Long-term program at Gemini North, mask 04

  • GS2014BDD008-03_ODF.fits: Director’s time at Gemini South, mask 03


Masks that do not follow this naming convention will be removed from the Observing Tool and must be re-submitted.

The root name (e.g. GS2015AQ023-01) of a mask must be entered into the Observing Tool’s Custom Mask MDF field in the instrument static component when defining the phase II observations:


Fig. 9.1 Entering the ODF’s root name in the Observing Tool.

9.2. Uploading ODFs (et al.)

Use the Observing Tool’s file attachment facility to upload the following files:

  • ODF FITS files (*.cat files are not accepted)

  • Pre-images or pseudo-images (if the masks are based on external catalogs instead of pre-imaging)

Once the ODF is uploaded, you must add a comment to it in the Observing Tool that unambiguously associates the ODF with its pre-image (or pseudo-image). Likewise, you may add a comment to each pre-image associating it with its respective ODF(s). At least one of the two is required.


Fig. 9.2 Add comments to the preimages (or ODFs) that unambiguously tell us which ones belong together.