ASTROSAT CZTI

Data Quality Report

Orbit 20925

Creation date: 2024-06-27T18:21:16.417672
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/AS1C04_001T01_9000003082_20925cztM0_level2.evt modeM0/AS1C04_001T01_9000003082_20925cztM0_level2_quad_clean.evt
Size (bytes)472,659,840125,484,480
Size450.8 MB 119.7 MB
Events in quadrant A3,097,522854,067
Events in quadrant B3,489,398853,452
Events in quadrant C3,149,218826,268
Events in quadrant D4,125,407802,011

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137212
B0148842
C0137932
D0167402

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6673290.434587%
B6673931.393676%
C6673671.004046%
D66732704.046156%

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 7658 6674 3 3 0.04% 0.04%
B 7658 6674 42 42 0.55% 0.63%
C 7658 6674 3 3 0.04% 0.04%
D 7658 6674 237 237 3.09% 3.55%

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 5 16 57105 355.13 788 770 158.6
A 15 174 9793 56.88 788 770 158.6
A 0 226 6954 38.98 788 770 158.6
B 3 64 208621 1407.79 784 767 147.6
B 7 220 56674 378.66 784 767 147.6
B 0 229 39512 262.42 784 767 147.6
C 14 238 118561 663.12 759 762 177.6
C 9 54 35406 195.02 759 762 177.6
C 5 4 22301 121.25 759 762 177.6
D 9 1 649197 3554.46 756 733 182.4
D 1 52 269501 1473.21 756 733 182.4
D 1 20 226421 1237.07 756 733 182.4

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