ASTROSAT CZTI

Data Quality Report

Orbit 20201102_A09_038T14_9000003964_level2

Creation date: 2025-12-17T04:21:26.278989
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_038T14_9000003964cztM0_level2.fits modeM0/AS1A09_038T14_9000003964cztM0_level2_quad_clean.evt
Size (bytes)38,214,72044,910,720
Size36.4 MB 42.8 MB
Events in quadrant A233,118288,014
Events in quadrant B221,204277,850
Events in quadrant C225,104265,619
Events in quadrant D192,680242,451

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A083180
B097220
C082650
D0110290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0840
B0840
C0840
D0840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4041260.643405%
B40411573.885177%
C4041461.138332%
D40411393.439743%

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 4960 4039 0 0 0.00% 0.00%
B 4961 4040 0 0 0.00% 0.00%
C 4960 4039 0 0 0.00% 0.00%
D 4961 4041 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 14 188 244 11.15 60 57 16.8
A 0 29 224 9.96 60 57 16.8
A 14 204 222 9.84 60 57 16.8
B 2 9 172 8.71 58 55 13.4
B 14 254 160 7.81 58 55 13.4
B 12 37 153 7.29 58 55 13.4
C 1 81 182 7.5 59 55 16.9
C 1 80 169 6.73 59 55 16.9
C 7 111 162 6.32 59 55 16.9
D 10 189 158 6.48 55 50 16.7
D 6 67 154 6.24 55 50 16.7
D 12 6 140 5.4 55 50 16.7

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