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Data Calibration

Photometric data calibration for the SDSS-RM project

Qian Yang

Feb 11, 2017

Reference

Bok 90Prime image data reduction by Ian McGreer (https://github.com/imcgreer/idmrm). The core ubercal code are learnt from the IDL Ubercal code (by Finkbeiner, Padmanabhan & Schlegel) and python uberpy by Ian (https://github.com/imcgreer/uberpy).

Current version

Bok data Ubercal calibration

TODO

Bok data i band data error
CFHT data
Spectrophotometry
Mayall data
SDSS data
DRW parameters
Structure function parameters
Short time PSD

Main files

get_tref.pro
==> sdssrm-bok_tref.fits (use utDate)

get_otherinfo.pro
==>other_info_g_dt.fits
sdssRefStars_DR13_g.fits

get_nightindex_g.pro
==> sdssrm-bok_tref_nightg.fits

get_aper_data.pro
==> data_aper6_175_amp.fits

get_gframes.pro
==> frames_g.fits
Uniq good frame, 1606 in g band

check_solve4_data.pro (Main)

get_par_frame.pro
==> pars_framesout_new_175_amp.fits

get_aper_ratio.pro
==> frame_aper_ratio.fits

update_mags_aper.pro
==> mag_refmagout_new_175_amp_aper1_apercor.fits

stat_std_real_newmask_mag.pro
==> stat_mag_refmagout_new_175_amp_aper1_apercor_refmag.fits

get_err.pro
==> pars_framesout_new_175_amp_scale_cor.fits

get_qso_curves_cor.pro
==> lightcurves_bokrm_g_amp_mag_cor.fits

RM mask records

[2, 3, 5, 7, 11, 13, 17, 19, 23, 37, 59, 317, 331]
flag = 0 ==> mask = 2, throw =1
mag>90 ==> mask=3, throw = 1
err>0.2 ==> mask=5
objid, ns <=5 ==> mask = 7
objid, ns <=0 ==> mask = 11 (no)
djs_iterstat, 3 sigma outlier ==> mask = 13 (no)
mask, sigma>0.1 ==> mask == 17 (no?)
mag_mean > 20 ==> mask = 19, throw = 0
frameid, ns<10 ==> mask = 23, throw = 1
ratio (where > 0.1 or <-0.1) > 0.1==> mask = 29
remain sigma > 0.3 ==> mask = 31
objid, ns<=5 ==> mask=37
objid, ns<=0 ==> mask = 41
43 no
djs_iterstat, 5sigma, outlier ==> bmask = 47/311
not mask, nd<=1, mask = 53
abs(mea - sdss_mag)>0.5 or sigma>0.1 ==> mask = 59/313
sdss_mag >18 and mask=1 ==> mask = 211
k<0 ==> mask = 223
clean_frame, offset>0.1 ==> mask = 317, throw = 1

Contract

Any question please feel free to email Qian ([email protected]).

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