IRSA IDL Tools

Version 2.0

Last Updated: 10 Sep 2017

README
query_irsa_cat.pro - queries IRSA catalogs, returning an IDL structure
read_ipac_table.pro - reads an IPAC Table file into an IDL structure
read_ipac_var.pro - converts an internal variable to an IDL structure
write_ipac_table.pro - writes an IDL structure to an IPAC Table file

Summary

IRSA provides a set of 4 IDL programs to assist users in retrieving and working with its catalogs and tables. The README contains installation instructions. The program query_irsa_cat.pro will run name or position searches on a specified catalog within a given radius. The catalog identifiers can be found in the "catname" column here. The default is the 2MASS Point Source Catalog. Programs are also provided to facilitate converting between IPAC Table format and IDL structures.

NOTE: With Version 2.0, http connections are via IDLnetURL and the main structure is now just the data array, with the comments/keywords and column headers stored separately. See the README for details. The new structure is much more flexible, but not backwards compatible. The earlier versions (but with the IDLnetURL update) are saved here:

Download Previous Version 1.6

Examples

(1) Find WISE AllWISE detections within 30 arcsec of L1228


IDL> info = query_irsa_cat('L1228', catalog='allwise_p3as_psd', radius=30, table_col_info=t1, table_hdr=h1 )

IDL> help, /struct, info 

IDL> print, info.ra, info.dec

(2) Find the position of the faintest IRAS 60 micron source within 1 degree of the central position of the COSMOS survey (10:00:28.6 +02:12:21.0 in J2000).


IDL> info = query_irsa_cat([150.11916,2.2058333], catalog='irasfsc', radius=1, radunits='deg', table_col_info=t1, table_hdr=h1)

IDL> idx = where(info.fnu_60 eq min(info.fnu_60))

IDL> print, info[idx].ra, info[idx].dec

(3) (A longer query) Plot a histogram of the J magnitudes of all 2MASS point sources stars within 10 arcminutes of the center of the globular cluster M13.


IDL> info = query_irsa_cat('m13',radius=10,radunits='arcmin', table_col_info=t1, table_hdr=h1)

IDL> plothist,info.j_m,xran=[10,20]

If you encounter any problems please send a bug report to the IRSA Help Desk.

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IRSA IDL Tools

Contents

Summary

Examples