ASTROSAT CZTI

Data Quality Report

Orbit 31746

Creation date: 2024-06-27T20:32:13.035992
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/AS1T04_034T01_9000004632_31746cztM0_level2.evt modeM0/AS1T04_034T01_9000004632_31746cztM0_level2_quad_clean.evt
Size (bytes)745,646,40098,311,680
Size711.1 MB 93.8 MB
Events in quadrant A7,060,845594,857
Events in quadrant B6,192,973657,099
Events in quadrant C4,444,805643,497
Events in quadrant D4,446,327629,396

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0254082
B0226602
C0174962
D0177302

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6474126119.477912%
B64743094.772938%
C64743655.637936%
D64741372.116157%

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 7559 6475 802 802 10.61% 12.39%
B 7559 6475 41 41 0.54% 0.63%
C 7559 6475 140 140 1.85% 2.16%
D 7559 6475 53 53 0.70% 0.82%

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 13 3995637 25173.62 794 779 158.7
A 13 254 10806 63.19 794 779 158.7
A 3 137 7881 44.75 794 779 158.7
B 6 159 1778471 11178.39 842 823 159.0
B 4 80 897709 5639.89 842 823 159.0
B 5 172 69348 430.91 842 823 159.0
C 0 10 1041823 5553.05 812 820 187.5
C 14 238 131519 697.19 812 820 187.5
C 3 233 50411 264.53 812 820 187.5
D 8 195 815987 4137.23 836 817 197.0
D 12 233 207599 1049.48 836 817 197.0
D 1 52 151594 765.24 836 817 197.0

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