ASTROSAT CZTI

Data Quality Report

Orbit 35737

Creation date: 2022-05-09T17:02:14.738736
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/AS1A09_029T06_9000005126_35737cztM0_level2.evt modeM0/AS1A09_029T06_9000005126_35737cztM0_level2_quad_clean.evt
Size (bytes)523,123,20095,791,680
Size498.9 MB 91.4 MB
Events in quadrant A4,583,173630,903
Events in quadrant B3,133,201649,390
Events in quadrant C3,554,866625,825
Events in quadrant D4,193,061604,226

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173423
B0127502
C0140552
D0162642

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A558459110.583811%
B55841262.256447%
C55841562.793696%
D55841552.775788%

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 7407 5584 534 534 7.21% 9.56%
B 7407 5585 93 93 1.26% 1.67%
C 7407 5585 158 158 2.13% 2.83%
D 7407 5585 171 171 2.31% 3.06%

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 1937964 15066.43 641 630 128.6
A 10 83 139456 1079.63 641 630 128.6
A 7 16 9198 66.63 641 630 128.6
B 5 172 401486 3174.01 660 642 126.3
B 0 189 95132 748.2 660 642 126.3
B 5 255 26622 205.72 660 642 126.3
C 2 16 523080 3517.96 641 646 148.5
C 15 214 236080 1585.36 641 646 148.5
C 0 10 107803 721.57 641 646 148.5
D 14 52 840742 5266.02 652 636 159.5
D 1 52 369589 2312.7 652 636 159.5
D 2 153 72740 451.97 652 636 159.5

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