1. Identify and download calibration data (biases and flux standard) from
Gemini Science Archive. (GSA Complete Catalog Query)
http://www2.cadc-ccda.hia-iha.nrc-cnrc.gc.ca/gsa/

- PI DATA PACKAGE RETRIEVAL to get science data, flats, procecessed bias, and logs.
- COMPLETE CATALOG: BIASES for flux std and DARKS for targets

to DOWNLOAD DATA
- save html file as file.html
- use wget to retrieve

wget --http-user=<user> --http-password=<pswd> -B http://www1.cadc-ccda.hia-iha.nrc-cnrc.gc.ca -F -i file1.html

to PRINT LOGS
a2ps -1r -f7 -b

For calibration data
- BIASES
NEW: archive provides already processed BIAS
OLD:
Find appropriate biases with same parameters as science data
CCDSEC == [1:2048,1:4608]
CCDSUM = 2 2
- download all biases in date range of science data

- FLUX CALIBRATOR
- find biases (need to have same binning and CCDSEC as flux obs)
CCDSUM = 2 2
CCDSEC == [1:2048,1792:2815]

- DARKS (For Nod and Shuffle data)
- darks should match dark time and nodcount for objects
NODCOUNT = 8
NODPIX = 1536
EXPTIME = 900..1000
CCDSUM = 2 2

2. Once everything is downloaded, move image frames to images/
- mkdir images/

hselect > images.lis
    images = "*.fits[0]"
    fields = "$I"
    expr = grating ?= 'MIRROR'  && obstype != 'BIAS'

- emacs images.lis to get of [0] (Cntl-x r k to use a rectangular kill)
- imrename @images.lis images/

4. Make lists with different data types
- OBJECTS

hselect > objects.lis
    images = "*.fits[0]"
    fields = "$I"
    expr = obstype ?= 'OBJECT'

- FLATS

hselect > flats.lis
    images = "*.fits[0]"
    fields = "$I"
    expr = obstype ?= 'FLAT'

- ARCS

hselect > arcs.lis
    images = "*.fits[0]"
    fields = "$I"       
    expr = obstype ?= 'ARC'

- BIASES (if one was not already processed for you)

hselect > bias.lis 
    images = "*.fits[0]"
    fields = "$I"      
    expr =  obstype ?= 'BIAS' && nccds = 3

- BIASES (for Nod and Shuffle data)

hselect > dark.lis 
    images = "*.fits[0]"
    fields = "$I"      
    expr =  obstype ?= 'DARK'

NOTE: don't forget to emacs *.lis to get rid of [0] (Cntl-X R K)

5. GPREPARE the data

• OBJECTS

inimages = @objects.lis
rawpath = /data/hillary/4/kelle/optical_spectra_raw/Geminispec/GN_2004B_Q_10_2/RAW
outpref = /data/hillary/2/kelle/optical_spectra/runs/gemini/GN_2004B/run2/gt
fl_vard = no
fl_addm = yes
(Should get no warnings or errors)

• FLATS

inimages = @flats.lis
rawpath = /data/hillary/4/kelle/optical_spectra_raw/Geminispec/GN_2004B_Q_10_2/RAW
outpref = /data/hillary/2/kelle/optical_spectra/runs/gemini/GN_2004B/run2/gf
fl_vard = no
fl_addm = yes
(Should get no warnings or errors)

• ARCS

inimages = @arcs.lis
rawpath = /data/hillary/4/kelle/optical_spectra_raw/Geminispec/GN_2004B_Q_10_2/RAW
outpref = /data/hillary/2/kelle/optical_spectra/runs/gemini/GN_2004B/run2/ga
fl_vard = no
fl_addm = yes
(Should get no warnings or errors)

• BIASES (for flats, arcs, and not Nod & Shuffle observations)

inimages = @bais.lis
outpref = /data/hillary/2/kelle/optical_spectra/runs/gemini/GN_2004B/run2/gb
fl_addm = no (if set to yes, doesnt really matter, but might give error)
(OK: WARNING - GPREPARE: ... use fl_addmdf=yes)
(OK: WARNING - GPREPARE: ... OBSMODE=IMAGE)

• DARKS

inimages = @darks.lis
rawpath = /data/hillary/4/kelle/optical_spectra_raw/Geminispec/GN_2004B_Q_10_2/RAW
outpref = /data/hillary/2/kelle/optical_spectra/runs/gemini/GN_2004B/run2/gd
fl_vard = no
fl_addm = yes
(Should get no warnings or errors)