CCD Data Reductions
The person in charge of the direct CCD data reductions is Mario Hamuy,
who is backed up by Miguel Roth. His duties are the following: Make a subdirectory in the /csp1/SWO/ directory following the CSP
naming convention, i.e., 20020914_15 (e.g.), and FTP all the data to
Get the observing log from here, so you can familiarize yourself
with the data taken and the problems reported during the night.
Copy "snphot$README_SWO_DC" into current directory.
Edit this reduction log file during the data processing.
Type "reset uparm=snphot$uparm_SWO_DC/".
Load 'snphot' package by typing 'snphot'.
Open DS9 window
Inspect the image headers with the task chkhead.
Use the task headers to update the airmass, JD, and UT in the image headers.
Type "ccdlist *fits" to check that imagetyp is properly set in headers.
- If dome flats in any of the BVgri filters are missing, grab one from /csp1/opt_phot/calibrations
and rename it to Dflat_x (chose one from a nearby date)
- If sky flats in any of the uBVgri filters are missing, grab one from /csp1/opt_phot/calibrations
and rename it to Sflat_x (chose one from a nearby date)
Use the task ccd40 to process direct images through [OTZF].
Use the task spread to spread images in database.
- If some calibration image is not useful, rename from ccdxxx to Bccdxxx, so it doesn't get processed
Note that this task will not copy the images to the database. It
will just create a script file called "spread". To make the copy effective
you need to type
cl < spread
Before using the script edit the file and get rid from this file the
lines corresponding to dome or sky flats grabbed from other nights.
If photometric, you have to obtain the photometric calibration for the night
and apply it to the photometric sequences (see the instructions here).
Record all the raw and reduced data in a DVD. For more information
about burning DVDs click here. Label the DVD with the date, telescope,
instrument, and the "RAW+PROCESSED" label. Leave the DVD in the CSP
office in La Serena.
Once you have saved all the data in the DVD, erase all the *fits files
from the subdirectory. Do not erase any of the remaining files.
All this subdirectory with the remaining files (without the fits files)
should be copied into /csp1/SWO/. If you are working in csp1,
csp2, or csp3 you just need to type:
cp -r 20040831_01/ /csp1/SWO/
If you are not in any of the csp computers you will have to ftp
the subdirectory to /csp1/SWO/.
Print the observing log and the reduction log files, put them in a folder,
and leave it in the CSP office in La Serena.