ASTROSAT CZTI

Data Quality Report

Orbit 20220818_T04_087T01_9000005292_level2

Creation date: 2022-08-22T15:18:35.557770
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1T04_087T01_9000005292cztM0_level2_bc.evt modeM0/AS1T04_087T01_9000005292cztM0_level2_quad_clean.evt
Size (bytes)2,942,029,440823,685,760
Size2.7 GB 785.5 MB
Events in quadrant A23,575,8305,177,916
Events in quadrant B18,533,4395,240,402
Events in quadrant C19,980,6125,058,912
Events in quadrant D22,445,0444,870,089

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02480
B02480
C02480
D02480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013740
B013740
C013740
D013740

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01691690
B01529010
C01518140
D01671140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6708428184.200704%
B670847131.062847%
C670848631.286447%
D6708420052.988790%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 97982 67109 779 779 0.80% 1.16%
B 97982 67100 59 59 0.06% 0.09%
C 97982 67100 237 237 0.24% 0.35%
D 97982 67100 358 358 0.37% 0.53%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 15 237 5445396 7154.92 3392 3334 760.6
A 10 83 2630686 3454.3 3392 3334 760.6
A 15 223 1553057 2037.49 3392 3334 760.6
B 0 213 1217367 1786.64 3442 3367 679.5
B 0 190 1041602 1527.97 3442 3367 679.5
B 5 172 931908 1366.53 3442 3367 679.5
C 14 254 2744532 3674.77 3287 3264 746.0
C 15 214 2666487 3570.15 3287 3264 746.0
C 0 10 781992 1043.91 3287 3264 746.0
D 2 249 3733189 4773.89 3333 3239 781.3
D 13 249 1106939 1412.6 3333 3239 781.3
D 2 153 1105521 1410.79 3333 3239 781.3

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter