Sdssidl

basic

• ObjID 和 run, rerun, camcol, field, id的转换

  superid = photoid(run,rerun,camcol,field,id)
  photoid_extract, superid, run, rerun, camcol, field, id

• par文件： yanny_readone (http://www.sdss3.org/dr9/software/par.php)

 IDL> a= yanny_readone('sdReport-52059.par', hdr=hdr) IDL> HELP, a, /STRUCTURE

plot

• plothist的功能比较强大，可以有norm选项