ASTROSAT CZTI

Data Quality Report

Orbit 35368

Creation date: 2022-04-15T11:01:17.473465
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_099T01_9000005068_35368cztM0_level2.evt modeM0/AS1A11_099T01_9000005068_35368cztM0_level2_quad_clean.evt
Size (bytes)839,980,80071,112,960
Size801.1 MB 67.8 MB
Events in quadrant A2,836,422524,675
Events in quadrant B12,884,870241,624
Events in quadrant C3,424,438510,174
Events in quadrant D5,896,165464,038

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121813
B0422552
C0136652
D0215172

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5880130.221088%
B5880467379.472789%
C5880971.649660%
D588062510.629252%

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 7253 5881 3 3 0.04% 0.05%
B 7253 5881 4193 4193 57.81% 71.30%
C 7253 5881 78 78 1.08% 1.33%
D 7253 5881 594 594 8.19% 10.10%

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 10 83 125700 896.24 685 670 139.5
A 13 6 22004 152.93 685 670 139.5
A 9 143 14279 97.55 685 670 139.5
B 4 251 10995698 156383.5 358 348 70.3
B 5 172 131609 1866.89 358 348 70.3
B 5 236 87104 1233.9 358 348 70.3
C 3 233 269364 1746.81 660 664 153.8
C 0 10 259720 1684.11 660 664 153.8
C 15 214 240447 1558.82 660 664 153.8
D 12 235 1265664 7997.94 644 626 158.2
D 8 195 643967 4067.39 644 626 158.2
D 1 52 547746 3459.05 644 626 158.2

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