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Дата индексирования: Mon Oct 1 23:27:23 2012
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Поисковые слова: orion nebula

   
*qpspec* - Time Resolved Spectral Fitting

For a source with a large number of counts in a long observation it is sometimes useful to study its spectrum as a function of time. This is done by extracting the spectrum within specified time intervals. To determine the time intervals available run timfilter (see Section 8.4):

xt> timfilter xdata$rp110590n00.qp
Ouput Time Filter list (): arlac

Reading from Qpoe file: xdata$rp110590n00.qp
Writing to Time Filter list: arlac.lis

        Good Time Intervals

start           end             duration

1606720.00      1607479.00      759.00

1611613.00      1612817.00      1204.00

qpspec can be run on the input qpoe file using times within these ranges

xs> qpspec
source qpoe file (xdata$rp110590n00.qp): xdata$rp110590n00.qp[time=(1606720.00:1607479.00)]
source region descriptor ():c 6947 9325 2'
background qpoe file ( ):  
bkgd region descriptor (): a 6947 9325 3' 4'
root name for output files [root_obs.tab, etc.] (): arlac_1


ds:                     0
file:                   arlac_1_obs.tab
scale:                  0.00
mission:                20
seqno:                  CA110590P.N6
instrument:             ROSAT_PSPC
sub-instrument:         1
no. pha channels:       34
mean off-axis angle
   of events (arcmin):  16.39
radius (arcmin):        2.00
filter:                 0
livetime (sec):         728.84
x, y:                   6947.00, 9325.00
livetime corr:          0.96
src area (sq. pix.):    180905.00
cts_tot (count):        54.00  129.00  264.00  324.00  315.00  495.00  329.00  
                        252.00  198.00  108.00  76.00  82.00  105.00  108.00  
                        153.00  244.00  259.00  273.00  312.00  259.00  
                        249.00  193.00  128.00  109.00  107.00  70.00  62.00  
                        35.00  22.00  16.00  9.00  5.00  6.00  0.00  
bkgd area (sq. pix.):   316676.00
ccts_bkg (count):       0.22  0.00  0.66  0.44  0.22  0.66  0.88  0.66  0.66  
                        0.22  0.44  1.10  0.44  0.44  0.44  0.66  0.22  0.22  
                        1.10  1.10  0.22  0.66  0.44  0.66  0.44  0.22  0.00  
                        0.44  0.44  0.00  0.00  0.44  0.00  0.00  
net (count):            53.78  129.00  263.34  323.56  314.78  494.34  328.12  
                        251.34  197.34  107.78  75.56  80.90  104.56  107.56  
                        152.56  243.34  258.78  272.78  310.90  257.90  
                        248.78  192.34  127.56  108.34  106.56  69.78  62.00  
                        34.56  21.56  16.00  9.00  4.56  6.00  0.00  
neterr (count):         8.41  12.40  17.28  19.03  18.78  23.27  19.17  16.91  
                        15.11  11.44  9.78  10.12  11.30  11.44  13.41  16.66  
                        17.12  17.55  18.70  17.13  16.81  14.93  12.36  
                        11.49  11.40  9.43  8.93  7.00  5.80  5.11  4.14  
                        3.45  3.62  1.91  
Output table file(s):  arlac_1_obs.tab, arlac_1_soh.tab, arlac_1_boh.tab
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