ASTROSAT CZTI

Data Quality Report

Orbit 20200511_A08_003T17_9000003656_level2

Creation date: 2021-08-30T19:25:21.614976
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/AS1A08_003T17_9000003656cztM0_level2_bc.evt modeM0/AS1A08_003T17_9000003656cztM0_level2_quad_clean.evt
Size (bytes)956,764,800327,925,440
Size912.4 MB 312.7 MB
Events in quadrant A5,279,9912,078,796
Events in quadrant B6,680,0182,081,844
Events in quadrant C5,844,1361,994,288
Events in quadrant D9,346,1351,941,605

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0549940
B0604910
C0570640
D0674670

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05460
B05460
C05460
D05460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A266865922.218392%
B2668711894.455353%
C266877322.742909%
D266869893.706063%

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 29147 26687 4 4 0.01% 0.01%
B 29147 26686 82 82 0.28% 0.31%
C 29147 26688 13 13 0.04% 0.05%
D 29147 26687 137 137 0.47% 0.51%

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 13 254 38008 121.27 1357 1325 302.5
A 6 16 34535 109.79 1357 1325 302.5
A 0 226 8521 23.79 1357 1325 302.5
B 3 64 747773 2868.86 1357 1322 260.2
B 10 246 570091 2185.97 1357 1322 260.2
B 0 190 43183 160.89 1357 1322 260.2
C 7 247 733047 2340.71 1308 1293 312.6
C 8 128 28044 85.57 1308 1293 312.6
C 3 233 20838 62.52 1308 1293 312.6
D 8 195 1625777 5194.22 1323 1273 312.8
D 7 238 1226653 3918.05 1323 1273 312.8
D 1 52 931428 2974.09 1323 1273 312.8

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