ASTROSAT CZTI

Data Quality Report

Orbit 35870

Creation date: 2022-06-08T20:12:40.674148
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_080T01_9000005146_35870cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35870cztM0_level2_quad_clean.evt
Size (bytes)506,888,64058,331,520
Size483.4 MB 55.6 MB
Events in quadrant A4,082,230367,197
Events in quadrant B3,437,656357,441
Events in quadrant C3,314,269353,535
Events in quadrant D4,163,741322,332

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0159443
B0133402
C0129422
D0156392

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A52251743.330144%
B52251713.272727%
C52251222.334928%
D522552310.009569%

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 7348 5226 96 96 1.31% 1.84%
B 7348 5226 146 146 1.99% 2.79%
C 7348 5226 100 100 1.36% 1.91%
D 7348 5226 499 499 6.79% 9.55%

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 15 169 986769 7077.57 701 693 139.3
A 7 48 197169 1410.21 701 693 139.3
A 10 83 156623 1119.19 701 693 139.3
B 5 172 613588 4776.13 683 669 128.3
B 5 255 53286 410.01 683 669 128.3
B 0 190 23163 175.28 683 669 128.3
C 0 10 269369 1761.61 666 672 152.5
C 1 23 227980 1490.26 666 672 152.5
C 15 214 219018 1431.5 666 672 152.5
D 8 230 995811 6258.17 650 633 159.0
D 7 223 173738 1088.57 650 633 159.0
D 8 195 172360 1079.9 650 633 159.0

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