Differences

This shows you the differences between two versions of the page.

--- en:news:urat1_catalog [2015/04/23 21:37] – admin
+++ en:news:urat1_catalog [2015/11/06 20:43] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-~~NOTOC~~
 ====== URAT 1 ======
@@ Line 17: / Line 15: @@
 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).
@@ Line 39: / Line 37: @@
 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 from Vizier =====
+===== 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.
@@ Line 50: / Line 71: @@
   cd 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
   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
   mkdir asc
   cd access
   ./v1dump
   dump URAT binary data to ASCII
   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
   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)
   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
@@ Line 79: / Line 113: @@
 Then use [[en:documentation:catgen|Catgen]] to convert the text files to a binary catalog optimized for chart display.
   cd URAT1
+  unzip urat1.prj.zip
   mkdir cat
   ulimit -S -n 20000