sukye

quasars candidates

1. data
GOODS 1.1
http://archive.stsci.edu/pub/hlsp/goods/catalog_r1/
GOODS 1.9
not public

2. analysis
IDL 6.2
http://groups.google.com/group/comp.lang.idl-pvwave/topics
http://www.pha.jhu.edu/~sujian/IDL.html
————————————————————————-
i_dropouts:
IDL -> Macros -> Input ASCII -> NB_ACS_D10Z_ASCII
data start line : 73
IDL> myb=NB_ACS_D10Z_ASCII
IDL> myi=NI_ACS_D10Z_ASCII
IDL> myv=NV_ACS_D10Z_ASCII
IDL> myz=NZ_ACS_D10Z_ASCII

b=myb.field034
i=myi.field034
v=myv.field034
z=myz.field034

sz=myz.field036
sv=myv.field036
si=myi.field036
sb=myb.field036

nb=myb.field037
ni=myi.field037
nv=myv.field037
nz=myz.field037

flagz=myz.field030
flagv=myv.field030
flagi=myi.field030
flagb=myb.field030

radb=myb.field024
radi=myi.field024
radv=myv.field024
radz=myz.field024

clsz=myz.field028
clsv=myv.field028
clsi=myi.field028
clsb=myb.field028

objb=myb.field001
obji=myi.field001
objv=myv.field001
objz=myz.field001
obj=myb.field001

.run
openw,lun,’n_i_drop.txt’,/get_lun,width=105
For j=0u,39431u Do Begin
if i[j]-z[j] gt 1.3 and sz[j]/nz[j] gt 5.0 and (sv[j]/nv[j] lt 2.0 or v[j]-z[j] gt 2.8) $
and radz[j] lt 3.4 $
and flagz[j] le 8.0 $
and clsz[j] ge 0.80 $
and z[j] le 26.5 $
then printf,lun,obj[j],myb.field005[j],myb.field006[j],myb.field004[j],myz.field042[j],i[j]-z[j],clsz[j],radz[j]
Endfor
free_lun, lun
End
————————————————————————-

myb=SB_ACS_D10Z_ASCII
myi=SI_ACS_D10Z_ASCII
myv=SV_ACS_D10Z_ASCII
myz=SZ_ACS_D10Z_ASCII

.run
openw,lun,’s_i_drop.txt’,/get_lun,width=105
For j=0u,33954u Do Begin
if i[j]-z[j] gt 1.3 and sz[j]/nz[j] gt 5.0 and (sv[j]/nv[j] lt 2.0 or v[j]-z[j] gt 2.8) $
and radz[j] lt 3.4 $
and flagz[j] le 8.0 $
and clsz[j] ge 0.80 $
and z[j] le 26.5 $
then printf,lun,obj[j],myb.field005[j],myb.field006[j],myb.field004[j],myz.field042[j],i[j]-z[j],clsz[j],radz[j]
Endfor
free_lun, lun
End

————————————————————————-

3. image
ACS 1.0
http://archive.stsci.edu/pub/hlsp/goods/v1/
read/write .fits files
http://idlastro.gsfc.nasa.gov/fitsio.html
————————————————————————-

image = MRDFITS(’h_sz_sect11_v1.0_drz_img.fits.gz’,0)
j1=image[7953:8093,5186:5326]
MWRFITS, j1, ‘J033248.39-275555.0.fits’

————————————————————————-
more analysis
ds9
http://hea-www.harvard.edu/RD/ds9/

4. candidates so far

… …

and some of them are not included in
http://archive.stsci.edu/pub/hlsp/dropouts/
————————————————————————-
alpha_j2000: right ascension of barycenter [deg] (RA)
delta_j2000: declination of barycenter [deg] (dec)

GOODS Source Catalogs

Because the images are derived from overlapping ACS frames, taken at different orientations, the exposure time is not uniform across the images, and there is a complex pattern to the exposure-time variations. This is recorded in the weight maps released with the v1.0 images. We use this information to set IMAFLAGS_ISO in the catalogs to highlight areas that have less than typical exposure time. As a rule-of-thumb: Pixels with flag values > 8 are generally pretty suspect due to poor cosmic-ray rejection.

Most of the columns in the catalog are as defined by SExtractor, but we have added several additional columns. The column numbers and names are listed in the file headers in the usual SExtractor output file style. The additional, non SExtractor-created columns all end with _MOSAIC, to indicate that these are global values pertaining to the virtual, north-up mosaic.

The X_MOSAIC, Y_MOSAIC, XMIN_MOSAIC, YMIN_MOSAIC, XMAX_MOSAIC, YMAX_MOSAIC are the various x and y pixel positions in the reference frame of the full (virtual) mosaic of the GOODS field, with (0,0) at the central reference point of the mosaic. Thus, these columns will contain values that may range over {-19000,19000}.

The SECT_REFNUM indicates the _SECT.FITS file from the v1.0 image release which contains the barycenter of the object, at pixel coordinates (X_SECT, Y_SECT).

http://www.stsci.edu/science/goods/catalogs/r1.0z_readme/

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Vehicle Emissions Inspection Facility List
https://www.deq.virginia.gov/PhpToJavaWebApp/getFacilityList

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