document changing IRSA column precisions
@@ -202,15 +202,43 @@ Selecting Columns
The IRSA service allows to query either a subset of the default columns for a given table, or additional columns that are not present by default. This can be done by listing all the required columns separated by a comma (,) in a string with the ``selcols`` argument.
-An example where the WISE AllSky L1b catalog needs to be queried around the star HIP 12 with just the ra, dec and w1mpro columns would be:
+An example where the AllWISE Source Catalog needs to be queried around the star HIP 12 with just the ra, dec and w1mpro columns would be:
.. code-block:: python
>>> from astroquery.irsa import Irsa
- >>> table = Irsa.query_region("HIP 12", catalog="wise_allsky_2band_p1bm_frm", spatial="Cone", selcols="ra,dec,w1mpro")
+ >>> table = Irsa.query_region("HIP 12", catalog="allwise_p3as_psd", spatial="Cone", selcols="ra,dec,w1mpro")
+ >>> print(table)
+
+ ra dec clon clat w1mpro dist angle id
+ deg deg mag arcsec deg
+ ------- ------- ------------ ------------- ------ -------- ---------- ---
+ 0.041 -35.960 00h00m09.79s -35d57m36.94s 4.837 0.350806 245.442148 0
A list of available columns for each catalog can be found at https://irsa.ipac.caltech.edu/holdings/catalogs.html. The "Long Form" button at the top of the column names table must be clicked to access a full list of all available columns.
+Changing the precision of ascii output
+--------------------------------------
+
+The precision of the table display of each column is set upstream by the archive,
+and appears as the ``.format`` attribute of individual columns. This attribute affects
+not only the display of columns, but also the precision that is output when the table
+is written in ``ascii.ipac`` or ``ascii.csv`` formats. The ``.format`` attribute of
+individual columns may be set to increase the precision.
+
+.. code-block:: python
+
+ >>> from astroquery.irsa import Irsa
+ >>> table = Irsa.query_region("HIP 12", catalog="allwise_p3as_psd", spatial="Cone", selcols="ra,dec,w1mpro")
+ >>> table['ra'].format = '{:10.6f}'
+ >>> table['dec'].format = '{:10.6f}'
+ >>> print(table)
+
+ ra dec clon clat w1mpro dist angle id
+ deg deg mag arcs deg
+ ----------- ----------- ------------ ------------- ------ -------- ---------- ---
+ 0.0407905 -35.9602605 00h00m09.79s -35d57m36.94s 4.837 0.350806 245.442148 0
+
Other Configurations
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