ASTROSAT CZTI

Data Quality Report

Orbit 55171

Creation date: 2025-12-09T11:36:40.139216
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/AS1A14_022T16_9000006532_55171cztM0_level2.fits modeM0/AS1A14_022T16_9000006532_55171cztM0_level2_quad_clean.evt
Size (bytes)434,255,040102,968,640
Size414.1 MB 98.2 MB
Events in quadrant A4,153,511668,503
Events in quadrant B3,359,464726,566
Events in quadrant C3,914,653642,058
Events in quadrant D4,102,809593,498

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0175392
B0153432
C0167812
D0173882

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69972243.201372%
B69971842.629698%
C69971742.486780%
D69972113.015578%

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 9272 6999 144 144 1.55% 2.06%
B 9272 6999 49 49 0.53% 0.70%
C 9272 6999 121 121 1.31% 1.73%
D 9272 6999 191 191 2.06% 2.73%

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 3 78 1120258 6014.82 743 722 186.1
A 3 45 39177 206.6 743 722 186.1
A 0 8 38782 204.48 743 722 186.1
B 5 185 163002 1005.84 743 713 161.3
B 2 249 120899 744.89 743 713 161.3
B 4 81 73619 451.86 743 713 161.3
C 6 223 244328 1217.09 728 718 200.2
C 10 22 223766 1114.36 728 718 200.2
C 1 16 173804 864.75 728 718 200.2
D 11 129 1042109 5084.16 717 686 204.8
D 7 129 73629 356.1 717 686 204.8
D 5 173 48240 232.16 717 686 204.8

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