shows that ObsId 1505 is the only HRC-I observation with an exposure of 20 ks or higher.
Reprocessing of HRC-I observations with the new GMAP may be done in CIAO 4.2 or later, with CalDB 4.3.0 or later version installed, using hrc_process_events.
The first file affects HRC-I observations with DATE-OBS between 2010-09-25T12 00 00 and 2011-09-19T12 00 00, and is an upgrade of the previous GMAP of the same date.
We also find that there is significant improvement in background estimates of more recent HRC-I observations with the newer applicable datasets.
Because of recently identified inadequacies in the fiducial light calibration for HRC-I observations with very-off-nominal SIM positions (primarily calibration observations), the positions of some CSC sources detected in some HRC-I observations may be in error by more than the stated error ellipse dimensions.
Here we find all the grating observation of Cas A. The grating and instrument parameters can be combined to restrict, in this case, to HRC-I observations with the LETG, using a search of 1 degree about RA=12 0 0 and a Declination of 0. If you have access to a mirror of the Chandra Data Archive CDAA), then use the mirror parameter to point to it.
Suppose a grid contains k squares, with the ith square containing n i observations with ( {sum}_{i=1}^k{n}_i=N ).
Fig. 5: The data points from HRC-I observations, along with the original fit (dashed curve) used to derive gain corrections for years 1999-2009 GMAPs.
I dropped observations with nominal hourly wages exceeding 1000 dollars.
From this original sample I drop observations with missing or non-positive values for the number of employees, value added, or capital stock.
From this initial sample, I drop observations with non-contributory occupations and missing values of occupation and establishment location, and drop individuals for whom educational attainment is missing.
