Swope + e2v CCD Reduction Manual

Adopted from "No Botar" from Abdo and notes from Christa.
Updated on November 22, 2013 (Eric)
Updated on February 14, 2014 (Eric)

If observer did not run OBS_QUICK_SWO_NC_RED

Copy raw directory to work directory.

mkdir SWO_NC_20241120_21
cd SWO_NC_20241120_21
rsync -azvP /raw/SWO_NC_20241120_21/ccd0*c3.fits .

Check object keyword in headers.
```
hsel ccd\*fits object filter exptime
```
Run reduction pipeline.
```
QUICK_SWO_NC_RED 3
```
Comment on the reduction in the night report.
Check and update the SN log.

If observer ran OBS_QUICK_SWO_NC_RED

Go to work directory.

cd /csp21/work/SWO_NC_20241120_21
rm fcdc3.fits
chmod 775 *

Comment on the reduction in the night report.
Check and update the SN log.

Check images

ls fcd*fits > lfcd
View @lfcd
 Check and comment on each science and standard image.

WCS solutions

Check if WCS completed successfully (crval1 keyword is populated).
```
hsel fcd\*fits object filter crval1
```
If pipeline WCS failed, rerun to make sure. This probably will not work either.
```
WCS_NC fcd0066c3.fits 100
```
If pipeline WCS failed, run MKWCS interactively.
```
MKWCS fcd0066c3.fits /home/abdo/csp/mkwcs_swonc.par ra_deg dec_deg
```
- Try "trans" first. Click on circle, then star. Click on box on bottom left corner. Type "y".
- Try "rotate" second. Click on center, circle, then star.
- Try "scale" last.
- For details, see notes from Christa.

Copy WCS to other filters.

COPYWCS fcd0066c3.fits l1 /home/abdo/csp/cpwcs_swonc.par

If Matches=0, then try:

COPYWCS.old fcd0066c3.fits l1 /home/abdo/csp/cpwcs_swonc.par

Combine images

If there are mulitple exposures for an object in the same filter.

Ensure images have WCS solution. Go to iraf.

epar imcombine
input       = "fcd0042c3,fcd0043c3" List of images to combine
output      = "ncd0042c3"  List of output images
offset      = world
combination = average
rejection   = none
:go

Rename combined images "_u01" for example.
Copy combined images and not uncombined images during spread.

Spread

Spread reduced images to /csp21/data/.
```
ls fcd*.fits > lfcd
SPREAD lfcd /csp21/work/CATALOG 6 SWO NC
```
- Add new SN to /csp21/work/CATALOG
- Create local sequence catalog for new SN (see New catalog)
- Create fchart for new SNe (see Finding chart)
- Create new directory for new SN in /csp21/data/
- Change group permission
```
chmod g+rw /csp21/data/SN_new
```
Add to spread.txt non-CSP objects (without WCS solutions)
Run.
```
source spread.txt
```

New catalog

Check if something exists. Empty if that object does not exist yet!
```
SN_COORDS opt PTF13efe
```
Create catalogue for this object using the V-band image. MKCAT creates a file called: fcd0094c3.fits.cat
```
MKCAT fcd0094c3.fits PTF13efe opt
```
Check number of stars: if there are more than 30 stars edit the catalogue
Use only the first 30 stars, 'comment out' the others (#>30) for now
Add as first line with #0 the object!!

Create a png file of that catalogue

fits2png_wCat fcd0094c3.fits 700 fcd0094c3.fits.cat PTF13efe
display fcd0094c3.fits.png

Adjust the catalog such that the following are satisfied
- no (bright) star should be in a surrounding of about 15 arcsec of the SN
- stars should be distributed evenly over the image
- star to star distance should be larger than 3 arcsec
Delete all stars you commented out before too
Upload the cataloge
```
INSERT_COORDS fcd0094c3.fits.cat
```
For more details, see notes from Christa

Finding chart

May need to repeat as better images come in.

FC fcd.fits 700 ra_deg dec_deg
cp fcd.fits.png ../sn/fcharts/SN_new_SWO.png

Photometry

Measure instrumental magnitude: MAGINS
- List all objects.
```
ls /csp21/data/*/*24_11_21.fits > lmag
```
- Remove non-CSP objects from lmag, but keep all standards (CSF??).
- Make a catalog of all objects (except standards) and their local sequences named catmag
```
SN_COORDS opt SN_name > catmag
SN_COORDS opt SN_name >> catmag
```
- Run MAGINS.
```
MAGINS @lmag catmag /csp21/data/CATALOGS/STDS.txt mags.txt
```
- Populate database.
```
MAGINS2DB mags.txt
```

Determine zero points: MAGFIT1

For nights with 4 or more standards, run MAGFIT1 per filter.
Do test runs, in case of bad images.

Make sure ZP dispersion limits < 0.04

MAGFIT1 2024-11-21 u sc SWO NC | grep ZP
MAGFIT1 2024-11-21 g sc SWO NC | grep ZP
MAGFIT1 2024-11-21 r sc SWO NC | grep ZP
MAGFIT1 2024-11-21 i sc SWO NC | grep ZP
MAGFIT1 2024-11-21 B sc SWO NC | grep ZP
MAGFIT1 2024-11-21 V sc SWO NC | grep ZP

When done, copy to database.

MAGFIT1 2024-11-21 u db SWO NC
MAGFIT1 2024-11-21 g db SWO NC
MAGFIT1 2024-11-21 r db SWO NC
MAGFIT1 2024-11-21 i db SWO NC
MAGFIT1 2024-11-21 B db SWO NC
MAGFIT1 2024-11-21 V db SWO NC

Local sequence mag: MAGLSEQ
- If the night is photometric and there are 4 or more standards, run:
```
grep \ 0\  catmag | awk '{print "MAGLSEQ" , $1}' > t1
source t1
```

SN mag: MAGSN

Run:

grep \ 0\  catmag | awk '{print "MAGSN" , $1}' > t2
source t2

Clean up

Clean up after yourself.
```
rm -f ccd* bcd* lcd*
```

Precision Observations of Infant Supernova Explosions (POISE)

Swope + e2v CCD Reduction Manual