ASTROSAT CZTI

Data Quality Report

Orbit 15971

Creation date: 2024-06-27T17:15:53.038426
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/AS1T02_087T01_9000002352_15971cztM0_level2.evt modeM0/AS1T02_087T01_9000002352_15971cztM0_level2_quad_clean.evt
Size (bytes)502,692,48075,047,040
Size479.4 MB 71.6 MB
Events in quadrant A3,524,679450,559
Events in quadrant B4,453,228446,139
Events in quadrant C3,414,696437,654
Events in quadrant D3,337,876432,107

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153342
B0179571
C0149071
D0150811

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72771401.923870%
B72773144.314965%
C72771351.855160%
D7277831.140580%

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 7593 7278 32 32 0.42% 0.44%
B 7593 7278 160 160 2.11% 2.20%
C 7593 7278 1 1 0.01% 0.01%
D 7593 7278 2 2 0.03% 0.03%

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 9 143 113978 637.72 870 852 177.4
A 15 239 51907 287.81 870 852 177.4
A 0 226 7570 37.87 870 852 177.4
B 10 245 679103 4020.01 870 845 168.7
B 15 222 138486 815.79 870 845 168.7
B 0 182 72751 426.18 870 845 168.7
C 14 238 126992 636.28 835 841 198.3
C 3 233 16565 79.31 835 841 198.3
C 8 222 7781 35.0 835 841 198.3
D 12 110 114806 554.0 842 819 205.8
D 2 234 28254 133.34 842 819 205.8
D 1 52 11094 49.94 842 819 205.8

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