ASTROSAT CZTI

Data Quality Report

Orbit 20220131_A11_047T07_9000004892_level2

Creation date: 2022-02-01T21:17:09.386477
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/AS1A11_047T07_9000004892cztM0_level2_bc.evt modeM0/AS1A11_047T07_9000004892cztM0_level2_quad_clean.evt
Size (bytes)1,200,620,160374,739,840
Size1.1 GB 357.4 MB
Events in quadrant A5,699,1342,454,768
Events in quadrant B9,223,2812,436,270
Events in quadrant C6,778,7912,503,974
Events in quadrant D13,059,4902,339,938

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0498640
B0646660
C0520100
D0754950

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01190
B01190
C01190
D01190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04840
B04840
C04840
D04840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A23477530.225753%
B234779233.931507%
C234771320.562252%
D234779484.037995%

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 35464 23481 2 2 0.01% 0.01%
B 35464 23477 69 69 0.19% 0.29%
C 35464 23477 23 23 0.06% 0.10%
D 35464 23477 164 164 0.46% 0.70%

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 7 16 179120 604.19 1357 1341 294.2
A 10 83 90184 301.94 1357 1341 294.2
A 9 143 73150 244.05 1357 1341 294.2
B 5 172 1456728 5552.71 1356 1333 262.1
B 5 31 965783 3679.63 1356 1333 262.1
B 4 251 355894 1352.74 1356 1333 262.1
C 15 214 940806 3092.45 1360 1358 303.8
C 0 10 266651 873.28 1360 1358 303.8
C 14 254 88315 286.24 1360 1358 303.8
D 8 195 2853630 8547.78 1324 1297 333.7
D 12 235 1674961 5015.58 1324 1297 333.7
D 7 223 1023896 3064.49 1324 1297 333.7

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