ASTROSAT CZTI

Data Quality Report

Orbit 20200926_A09_120T02_9000003904_level2

Creation date: 2025-12-15T09:35:25.978733
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_120T02_9000003904cztM0_level2.fits modeM0/AS1A09_120T02_9000003904cztM0_level2_quad_clean.evt
Size (bytes)2,628,336,9602,540,940,480
Size2.4 GB 2.4 GB
Events in quadrant A15,242,01013,227,653
Events in quadrant B15,463,59415,851,758
Events in quadrant C16,606,89615,795,538
Events in quadrant D14,089,72213,919,631

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04240
B04250
C04260
D04240

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A054040
B054060
C054020
D054090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09366150
B07580390
C05671690
D07489820

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2650984719017.800964%
B2650762924411.032308%
C26515548301.821576%
D265081181796.857904%

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 309172 265166 0 0 0.00% 0.00%
B 309172 265302 0 0 0.00% 0.00%
C 309172 265374 0 0 0.00% 0.00%
D 309172 264692 0 0 0.00% 0.00%

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 0 29 12855 9.56 3971 3741 953.2
A 7 110 12635 9.33 3971 3741 953.2
A 9 19 11563 8.21 3971 3741 953.2
B 2 9 12118 10.4 4075 3887 791.1
B 5 128 10336 8.15 4075 3887 791.1
B 5 255 10052 7.79 4075 3887 791.1
C 1 81 13759 8.84 4386 4125 1089.8
C 1 80 13559 8.66 4386 4125 1089.8
C 12 241 11260 6.55 4386 4125 1089.8
D 4 246 10839 6.74 4024 3671 1063.7
D 6 67 9872 5.83 4024 3671 1063.7
D 10 189 9843 5.8 4024 3671 1063.7

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