version v1_0 date 29-Apr-1998 ############################################################################ ## Locus Parameters ## ## NOTE: Heidi, please comment ## ############################################################################ LOCUSFILEDIR $TARGET_DIR/examples CAPLOCUSMAGS -30 30 SKIRTLOCUSMAGS -30 30 HIZLOCUSMAGS -30 30 #not used, should be.? colors u-g g-r r-i ############################################################################ ## Fuzz Parameter ## ## This number times a random number gets added to the magnitude limit ## in order to "fuzz" the magnitude boundary. ## ## Currently not used (i.e. set to zero). ## ############################################################################ magnitudeFuzz 0.0 # The maximum amount to increase the limiting magnitude ############################################################################ ## Misc Parameters ## ## NOTE: Heidi, please comment ## ############################################################################ drMin 0 drMax 0.9 firstDelta 3 ############################################################################ ## ## NOTE: Heidi, please comment. ## ## NOTE: The HIZILIMIT is used as the limiting magnitude for ## high-redshift targets. I don't think that is what this section was ## meant for (GTR, 06/28/00). This should be a distinct parameter ## that has nothing to do with checking for "reasonableness". ## ############################################################################ HIZULIMIT 21.0 #limiting magnitude to check error reasonableness in u' HIZUERROR 2.0 #limiting error that is reasonable in u' HIZGLIMIT 21.0 #limiting magnitude to check error reasonableness in g' HIZGERROR 1.0 #limiting error that is reasonable in g' HIZRLIMIT 21.0 #limiting magnitude to check error reasonableness in r' HIZRERROR 1.0 #limiting error that is reasonable in r' HIZILIMIT 20.0 #limiting magnitude to check error reasonableness in i' HIZIERROR 1.0 #limiting error that is reasonable in i' HIZZLIMIT 21.0 #limiting magnitude to check error reasonableness in z' HIZZERROR 2.0 #limiting error that is reasonable in z' ############################################################################ ## ## NOTE: Heidi, please comment. ## ############################################################################ LOWZULIMIT 22.7 #limiting magnitude to check error reasonableness in u' LOWZUERROR 0.6 #limiting error that is reasonable in u' LOWZGLIMIT 23.4 #limiting magnitude to check error reasonableness in g' LOWZGERROR 1.0 #limiting error that is reasonable in g' LOWZRLIMIT 23.0 #limiting magnitude to check error reasonableness in r' LOWZRERROR 1.0 #limiting error that is reasonable in r' LOWZILIMIT 22.4 #limiting magnitude to check error reasonableness in i' LOWZIERROR 1.0 #limiting error that is reasonable in i' LOWZZLIMIT 21.0 #limiting magnitude to check error reasonableness in z' LOWZZERROR 1.0 #limiting error that is reasonable in i' ############################################################################ ## Systematic Errors ## ## Despite our best efforts, the photometric errors will not ## incorporate all of the possible error in the determination of ## magnitudes for these objects. As such add some additional error ## based on practical experience. ## ## NOTE: Xiaohui, or Heidi, please explain where these numbers come ## from. ## ############################################################################ SYSUERR 0.10 #systematic photmetric error in u' SYSGERR 0.03 #systematic photmetric error in g' SYSRERR 0.03 #systematic photmetric error in r' SYSIERR 0.03 #systematic photmetric error in i' SYSZERR 0.03 #systematic photmetric error in z' ############################################################################ ## ## NOTE: Heidi, or Xiaohui, please comment ## ############################################################################ SPECGLIMIT 18.5 #limiting magnitude of spectrograph in g', g' ~ 20.5 SPECRLIMIT 18.5 #limiting magnitude of spectrograph in r', r' ~ 20.5 SPECILIMIT 18.5 #limiting magnitude of spectrograph in i', i' ~ 20.5 IPSFLIMIT 20.0 #limiting magnitude to check for stellarness in i' ZPSFLIMIT 20.0 #limiting magnitude to check for stellarness in z' LIKELIHOOD 0.8 #limit on acceptable fit to PSF (0.8) PSFFRACTION 0.8 #fraction of light that must be contributed by the central # point source (fuzzy QSO detector) (0.8) CAPSTARS 1500.0 #sets the limit on the boundary of the cap region based # on the stellar density from the Bahcall-Soneira # model (1500/sq degree for M<20) ############################################################################ ## Magnitude limits for Cap targets ## ## These are the magnitude limits for cap objects. These only apply ## to low-z quasar candidates selected from the ugri color cube. ## Currently, only the i' limit is used. ## ## NOTE: Is there any reason we need to keep the g' and r' limits? ## (GTR, 06/28/00) ## ############################################################################ CAPGLIMIT 19.0 #limiting magnitude for spectroscopy in g', corrected for # reddening, G< 20 CAPRLIMIT 19.0 #limiting magnitude for spectroscopy in r', corrected for # reddening, R< 20 CAPILIMIT 19.0 #limiting magnitude for spectroscopy in i', corrected for # reddening, I< 20 ############################################################################ ## ## NOTE: Heidi, please comment. I have NO idea what these are for. ## ############################################################################ HIZUILIMIT 4.0 #limiting U-I color for hi-z quasars, U-I > 4 HIZUZLIMIT 4.0 #limiting U-Z color for hi-z quasars, U-Z > 4 HIZGILIMIT 3.0 #limiting G-I color for hi-z quasars, G-I > 3 HIZGZLIMIT 3.0 #limiting G-Z color for hi-z quasars, G-Z > 3 ############################################################################ ## Magnitude limits for Skirt targets ## ## These are the magnitude limits for skirt objects. These only apply ## to low-z quasar candidates selected from the ugri color cube. ## Currently, only the i' limit is used. ## ## NOTE: Is there any reason we need to keep the g' and r' limits? ## (GTR, 06/28/00) ## ############################################################################ SKIRTGLIMIT 19.0 #limiting magnitude for spectroscopy in g', corrected for # reddening, G< 18 SKIRTRLIMIT 19.0 #limiting magnitude for spectroscopy in r', corrected for # reddening, R< 18 SKIRTILIMIT 19.0 #limiting magnitude for spectroscopy in i', corrected for # reddening, I< 18 ############################################################################ ## ## NOTE: Heidi, please comment. Why are there separate magnitude ## limits for FIRST in the SKIRT, but not the CAP? ## ############################################################################ SKIRTFIRSTGLIMIT 19.0 #limiting magnitude for FIRST source skirt spectroscopy in g', G < 20 SKIRTFIRSTRLIMIT 19.0 #limiting magnitude for FIRST source skirt spectroscopy in r', R < 20 SKIRTFIRSTILIMIT 19.0 #limiting magnitude for FIRST source skirt spectroscopy in i', I < 20 ############################################################################ ## FIRST matching radius ## ## NOTE: Heidi, please comment. Where does this get used? ## ############################################################################ FIRSTERRORBOX 1.0 #matching radius for FIRST source with optical source, 1'' ############################################################################ ## Limits on number of objects ## ## NOTE: Heidi, please comment. Where does this get used? ## ############################################################################ MAXQSOSPERFIELD 10.0 #if more than N candidates found per 0.17x0.2 sq degree field, #then something may be wrong, N ~ 10 MAXQSOSPERTARGETAREA 500.0 #if more than NN candidates found per 3x3 sq degree #target area something may be wrong, NN ~ 500. ############################################################################ ## GALAXY CUT PARAMETERS ## These parameters set the width and orientation of the cut along the ## fundamental plane of galaxies within 3D color space. ## GALMAX and GALMIN are the width, while GAL_COEFF are the components ## of the normal to the fundamental plane. ############################################################################ GALMAX 0.4 GALMIN -0.1 GALXCOEFF -0.0279 GALYCOEFF -0.2350 GALZCOEFF 0.9716 ############################################################################ ## Toggle Switch for Rejection Boxes ## ## The CUTBOXES flag sets whether the various cuts like Astar, WD and W+M cuts ## are implemented. ## ## 1 implements cuts, 0 ignores cuts. ## ## For the North, this should be 1. In the South, we may set it to 0. ## The flags following CUTBOXES each control a specific cut, A star, WD, W+M## The TARGETMIDZ flag sets automatic targeting on midz objects. ############################################################################ CUTBOXES 1 CUTASTARS 1 TARGETMIDZ 1 CUTWD 1 CUTWM 1 ############################################################################ ## A Star Box Limits ## ## These parameters set the constraints of the Astar cut in the ## stellar locus within the relevant bands. Objects within this box ## are removed, unless CUTBOXES is 0. FIRST sources should in this ## box should NOT be rejected. ## ## Rationale for these limits. If you change the limits, please ## change these comments. ## ## Between redshift 2.5 and 3.0, quasars have g'-r' colors of about ## 0.1+/-0.l ## ## UGMINASTAR=0.9 -- The UVX cut is at or below 0.8, 0.9 gives a bit ## of padding. ## ## UGMAXASTAR=1.5 -- A stars are dwindling by here and we are in ## danger of cutting high-redshift quasars if we go much redder. ## ## GRMAXASTAR=0.00 -- Much redder than this will cut into the 2.5 < z ## < 3.0 quasar regime. ## ## GRMINASTAR=-0.35 -- We need a blue limit because we don't want to ## throw out interesting objects, especially if the density of A stars ## is low blueward of this. ## ############################################################################ UGMINASTAR 0.9 UGMAXASTAR 1.5 UGMINASTAR 0.9 GRMAXASTAR 0.00 GRMINASTAR -0.35 ############################################################################ ## Mid-z Box Limits ## ## These parameters set the constraints of the Mid-z inclusion ## box(es). Quasars with 2.5 < z < 3.0 tend to have colors that put ## them very close to, or in the stellar locus. In order to keep from ## missing too many such objects, we may choose to cut into the locus ## to get some more of these objects. This will have a significant ## negative effect upon the efficiency of the algorithm as a whole; ## however, if may be worth it. ## ## Currently, there are two distinct regions. This is largely because ## there is a small gap in u'-g' between where the stellar locus "end" ## and the quasars population "begins". NOTE: If we set the ## parameters right, we should be able to do it with one box. ## ## NOTE: This is an INCLUSION box and should NOT be tied to the A star ## rejection box in any way. ## ## Rationale for these limits. If you change the limits, please ## change these comments. ## ## Between redshift 2.5 and 3.0, quasars have g'-r' colors of about ## 0.1+/-0.l ## ## UGMINMIDZ=0.9 -- This is about the edge of the stellar locus. ## ## UGMAXMIDZ=1.5 -- Objects redder than this will be picked out as ## high-redshift candidates. ## ## GRMINMIDZ=0.00 -- Right now this is the same as the red edge of the ## A star box. ## ## GRMAXMIDZ=0.20 -- This cut is slightly redder than the end of the ## stellar locus and allows us to dip into the locus slightly. ## ## UGMINMIDZ2=0.65 -- This is approximately the red limit of UVX quasars. ## ## UGMAXMIDZ2=0.90 -- This is about the edge of the stellar locus. ## ## GRMINMIDZ2=0.00 -- Right now this is the same as the red edge of the ## A star box. ## ## GRMAXMIDZ2=0.20 -- This cut is slightly redder than the end of the ## stellar locus and allows us to dip into the locus slightly. ## ## MINMIDZDIST=0.30 -- NOTE: No longer used. ## ############################################################################ UGMINMIDZ 0.9 UGMAXMIDZ 1.5 GRMINMIDZ 0.00 GRMAXMIDZ 0.20 UGMINMIDZ2 0.65 UGMAXMIDZ2 0.9 GRMINMIDZ2 0.00 GRMAXMIDZ2 0.20 MINMIDZDIST 0.30 ############################################################################ ## White Dwarf Box Limits ## ## Reject very blue objects that are more likely to be white dwarfs ## than quasars. There is a region of color space where white dwarfs ## are the dominant stellar objects. We can reject most of this color ## space in order to increase the efficiency of quasars target ## selection without a significant hit in completeness. Objects in ## this box should not be selected (unless they are FIRST sources). ## ## NOTE: These parameters set the constraints on the White Dwarf ## cut. The commented out second set of params was the original WD cut ## suggested by GTR. IF ONE WISHES TO USE THE ORIGINAL CUT THE ## cutWDregion FUNCTION OF quasars.c MUST BE MODIFIED TO ACCEPT THE UG ## PARAMETERS, ALSO THESE PARAMETERS WOULD NEED TO BE ADDED TO THE ## STRUCTURE WITHIN taQuasars.h ## ## Rationale for these limits. If you change the limits, please ## change these comments. ## ## GRMINWD=-0.8 -- Technically, we don't need a blue limit, but we ## impose one so that we don't miss anything really interesting that ## is not in a dense WD region. ## ## GRMAXWD=-0.2 -- There are very few known quasars bluer than this ## limit. There are some near z=0.5, but their r'-i' colors are red ## (0.2 to 0.3). NOTE: A change to -0.1 (coupled with a RIMAXWD and a ## IZMAXWD change) would increase efficiency with a small effect upon ## completeness. ## ## RIMINWD=-0.6 -- See GRMINWD ## ## RIMAXWD=-0.2 -- There are very few known quasars bluer than this ## limit. Exceptions aare z=0.4 and z=0.8 to z=1.4; however, they are ## redder in either g'-r' or i'-z'. NOTE: A change to -0.1 (coupled ## with a GRMAXWD and a IZMAXWD change) would increase efficiency with ## a small effect upon completeness. ## ## IZMINWD=-1.0 -- See GRMINWD ## ## IZMAXWD=-0.0 -- Many quasars are bluer than this, but not very many ## with blue r'-i' colors. NOTE: A change to -0.1 (coupled with a ## GRMAXWD and a IZMAXWD change) would increase efficiency with a ## small effect upon completeness. ## ############################################################################ GRMINWD -0.8 GRMAXWD -0.2 RIMINWD -0.6 RIMAXWD -0.2 IZMINWD -1.0 IZMAXWD -0.0 #UGMINWD -0.5 #UGMAXWD 0.85 #GRMINWD -0.8 #GRMAXWD -0.4 #RIMINWD -0.6 #RIMAXWD -0.3 ############################################################################ ## White Dwarf + M Star Box Limits ## ## Reject unresolved pairs of white dwarfs and M stars. There is a ## region of color space where unresolved white dwarfs and M stars ## stick out from the stellar locus. The density of real quasars is ## not very high here, but we want to investigate all stellar sources ## outside of the stellar locus as much as possible. This cut rejects ## the region that is most heavily contaminated by these objects. ## Objects in this box should not be selected (unless they are FIRST ## sources). ## ## Rationale for these limits. If you change the limits, please ## change these comments. ## ## GRMINWM=0.0 -- WD+M pairs shouldn't have colors much bluer than ## this. ## ## GRMAXWM=1.6 -- We need to impose a red limit to keep from throwing ## away high-redshift candidates. 1.6 is about the red edge of the M ## stars. ## ## RIMINWM=0.6 -- There are quasars bluer than this. ## ## RIMAXWM=2.0 -- WD+M objects should not be redder than this, and we ## don't want to miss anything interesting since the WD+M density ## should be low past this. ## ## RERRMAXWM=0.2 -- If the errors are too large, then it is difficult ## to say if this object really is in the box or not. NOTE: I'm not ## sure that we want to use this (GTR, 06/28/00). ## ############################################################################ GRMINWM 0.0 GRMAXWM 1.6 RIMINWM 0.6 RIMAXWM 2.0 RERRMAXWM 0.2