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en:news:urat1_catalog [2015/04/23 21:34]
admin [Build a local catalog for Skychart]
en:news:urat1_catalog [2015/11/06 20:43] (current)
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-~~NOTOC~~ 
- 
 ====== URAT 1 ====== ====== URAT 1 ======
  
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 significant improvement in positional precision as compared to UCAC. significant improvement in positional precision as compared to UCAC.
  
-{{ :​en:​screenshot:​x010_m13_urat1.png?350|}}+{{ :​en:​screenshot:​x010_m13_urat1.jpg?350|M13 with URAT1 catalog}}
  
   * Observational catalog, i.e. mean positions of stars at mean epoch of URAT observing (between 2012.3 and 2014.6), on the International Celestial Reference System (ICRS).   * Observational catalog, i.e. mean positions of stars at mean epoch of URAT observing (between 2012.3 and 2014.6), on the International Celestial Reference System (ICRS).
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   * Photometry from 2MASS and American Association of Variable Star Observers Photometry All-Sky Survey (APASS) is added for stars in common   * Photometry from 2MASS and American Association of Variable Star Observers Photometry All-Sky Survey (APASS) is added for stars in common
  
-Read more details at http://​www.usno.navy.mil/​USNO/​astrometry/​optical-IR-prod/​urat+Read more details at http://​www.usno.navy.mil/​USNO/​astrometry/​optical-IR-prod/​urat ​\\ and http://​cdsarc.u-strasbg.fr/​viz-bin/​Cat?​I/​329 
 + 
 +===== Access the catalog online from Vizier ===== 
 + 
 +You can show the URAT1 catalog data for a specific area in Skychart without downloading the full catalog by using the [[en:​documentation:​catalog#​vo_catalog|Virtual Observatory interface]]. 
 + 
 +Start by zooming to a small sky area of the northern hemisphere, about 30 arcmin width, use preferably Equatorial coordinates.\\ 
 +Be sure the button "Show Virtual Observatory data" is checked.{{:​en:​news:​vo_urat0.png|}}\\ 
 +Open the menu Setup -> Catalog -> VO Catalog, click the Add button. 
 + 
 +Type URAT in the search field and click "By name" button, then "​Select catalog"​\\ 
 +{{:​en:​news:​vo_urat1.png?​200|}}  
 + 
 +Select "​f.mag"​ for the magnitude, change Default magnitude to 19, click "​Download catalog"​ \\ 
 +{{:​en:​news:​vo_urat2.png?​200|}} 
 + 
 +Be sure the new URAT line is green and click OK.\\ 
 +{{:​en:​news:​vo_urat3.png?​200|}} 
 + 
 +The chart now show the URAT1 stars for the selected area. \\ 
 +Save the program options to keep your VO catalog definition for a next time. 
 + 
 +To show the stars for another area, open the menu Setup -> Catalog -> VO Catalog (or right click the "Show Virtual Observatory data" button).\\ 
 +Then click the reload arrow on the right column. When the download is finished click the OK button. 
  
-===== Access the catalog from Vizier ===== 
  
  
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   cd URAT1   cd URAT1
   wget --mirror ftp://​cdsarc.u-strasbg.fr/​pub/​cats/​I/​329/​URAT1/​   wget --mirror ftp://​cdsarc.u-strasbg.fr/​pub/​cats/​I/​329/​URAT1/​
 +  mv cdsarc.u-strasbg.fr/​pub/​cats/​I/​329/​URAT1/​* .
 +  cd ..
 +
 +In the "​access"​ directory compile the v1dump program. You need a Fortran compiler, for example gfortran, available in every Linux distribution or on Windows with [[https://​www.cygwin.com/​|Cygwin]] or [[http://​www.mingw.org/​|Mingw]].\\
  
-In the "​access"​ directory compile the v1dump program. You need a Fortran compiler for example gfortran available in every Linux distribution or on Windows with Cygwin or Mingw. 
   cd URAT1/​access   cd URAT1/​access
   gfortran -o v1dump v1dump.f v1sub.f   gfortran -o v1dump v1dump.f v1sub.f
 +  cd ../..
   ​   ​
 +For convenience for Windows users you can also download a [[http://​www.ap-i.net/​pub/​skychart/​urat/​v1dump.zip|precompiled v1dump.exe]]
   ​   ​
-Run v1dump to extract the data from the binary files to a new "​asc"​ directory.+Run v1dump to extract the data from the binary files to a new "​asc"​ directory. Response to prompt are in bold.
   cd URAT1   cd URAT1
   mkdir asc   mkdir asc
   cd access   cd access
   ./v1dump   ./v1dump
 +
   dump URAT binary data to ASCII   dump URAT binary data to ASCII
   hit "​enter"​ to accept defaults or enter new values   hit "​enter"​ to accept defaults or enter new values
-  path input = /​d01/​urat/​v12/ ​                         ../v12/+  path input = /​d01/​urat/​v12/ ​ 
 +**../v12/**
   binary data are stored in LINUX-style sequence   binary data are stored in LINUX-style sequence
   some computers (PC-style) need a byteflip   some computers (PC-style) need a byteflip
-  byte flip (Y/N) ?  N  N +  byte flip (Y/N) ?  N  ​ 
-  path output= ./                                      ../asc/ +**N** 
-  first, last zone (326..900) to handle now =  326 327  326 900+  path output= ./                                      ​ 
 +**../asc/** 
 +  first, last zone (326..900) to handle now =  326 327  ​ 
 +**326 900**
   enter column separator character (default = blank) ​   enter column separator character (default = blank) ​
        
   begin read file = ../​v12/​z326 ​                                 ​   begin read file = ../​v12/​z326 ​                                 ​
-  ... output to   = ../ascz326.asc   +  ... output to   = ../asc/z326.asc   
   ...   ...
 +  ... output to   = ../​asc/​z900.asc ​
 +  ​
 +  cd ..
     ​     ​
 Download the example project file for Skychart Catgen from http://​www.ap-i.net/​pub/​skychart/​urat/​urat1.prj.zip Download the example project file for Skychart Catgen from http://​www.ap-i.net/​pub/​skychart/​urat/​urat1.prj.zip
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 Then use [[en:​documentation:​catgen|Catgen]] to convert the text files to a binary catalog optimized for chart display. Then use [[en:​documentation:​catgen|Catgen]] to convert the text files to a binary catalog optimized for chart display.
   cd URAT1   cd URAT1
 +  unzip urat1.prj.zip
   mkdir cat   mkdir cat
   ulimit -S -n 20000   ulimit -S -n 20000
en/news/urat1_catalog.1429817674.txt.gz · Last modified: 2015/11/06 20:35 (external edit)