ASTROSAT CZTI

Data Quality Report

Orbit 20220118_T04_093T01_9000004872_level2

Creation date: 2025-12-31T10:26:27.179531
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_093T01_9000004872cztM0_level2.fits modeM0/AS1T04_093T01_9000004872cztM0_level2_quad_clean.evt
Size (bytes)199,647,360202,368,960
Size190.4 MB 193.0 MB
Events in quadrant A1,238,5161,249,253
Events in quadrant B1,135,1941,177,176
Events in quadrant C1,164,0341,139,948
Events in quadrant D1,011,8141,066,158

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0438900
B0605230
C0594280
D0666190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04420
B04420
C04420
D04420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720
B0720
C0720
D0720

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A21728290.133468%
B2172716007.364109%
C2172812045.541237%
D217288633.971834%

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 27458 21727 0 0 0.00% 0.00%
B 27458 21715 0 0 0.00% 0.00%
C 27458 21699 0 0 0.00% 0.00%
D 27458 21685 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 7 110 1027 8.68 323 302 83.6
A 9 19 997 8.32 323 302 83.6
A 0 29 977 8.08 323 302 83.6
B 2 9 1011 11.83 300 286 61.3
B 3 80 919 10.33 300 286 61.3
B 2 8 786 8.16 300 286 61.3
C 3 202 946 8.26 307 288 79.7
C 1 81 942 8.21 307 288 79.7
C 3 203 930 8.06 307 288 79.7
D 7 3 774 6.47 289 264 78.8
D 11 66 740 6.04 289 264 78.8
D 4 160 740 6.04 289 264 78.8

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