Suzaku Help Jp: Question #0048

Question ID = 0048

Name and Institute (質問者/機関)

Tuomas Lehto (University of Helsinki, Finland)

Question (質問)

I was extracting an NTE background for our recently received pointing following instructions given on the web page http://www.astro.isas.jaxa.jp/suzaku/analysis/xis/nte/.
Under "[3] How to make COR weighted background spectra as mentioned above" the first stage "1. Make COR sorted NTE spectra from the NTE database event files." was completed succesfully using an event file and an ehk file provided by the web page.

In the second stage "2. Make COR sorted spectra of the source observation, using the same tool mk_corsorted_spec_v1.0.pl." I run a command

./mk_corsorted_spec_v1.0.pl -i ae801003010xi3_0_3x3n066a_cl.evt -d . -e
ae801003010xi3_0.hk -ed . -s 3 -o src -r bkg_galactic_detxy.reg

I got the following error message (for all "COR ranges"):

 !xsel:SUZAKU-XIS3-STANDARD > select hk "COR>12 && COR<=13"
 PREFR keyword not found, using prefr = 0.5
 POSTFR keyword not found, using postfr = 0.5
 maketime2.9 : Failed to parse expression
 maketime2.9 : Error Status Returned :  202
 maketime2.9 : keyword not found in header

 maketime2.9 :  ***** FITSIO Error Stack Dump *****
 ffgcnn could not find column: COR
 ffgkey could not find keyword: COR .

The instructions say that one should use an ehk file here, but we do not have such a file. With our data for A2104 we only received a hk file per observation, and we used that in the above. Perhaps this is the reason for the problem? How could we produce a proper ehk file?

In the third stage "3. Make COR weighted NTE background spectra appropriate for the source observation" no more error messages were receved. The run did produce an output file but I wonder whether the above error message is significant, and whether this file is corrupted in some way.

Answer from(回答の文責)

A. Bamba (suzaku_help)

Answer (答え)

The ehk file is already provided in the auxil/ directory of the data distribution. The directory structure is as follows:

{$OBSID}/
        auxil/
                ae{$OBSID}.ehk
        hxd/
        log/
        xis/
                event_cl/
                        ae{$OBSID}xi{$S}_?_{mode}{ucode}_cl.evt

Thus one needs to make a link to, or copy, the ehk file in the work directory.

Status （詳細なステータス）

2007-03-19 Done

RIKEN Makishima Cosmic Radiation Laboratory

Assigned Member (担当者)

Name and Institute (質問者/機関)

Question (質問)

Answer from(回答の文責)

Answer (答え)

Status （詳細なステータス）