ASTROSAT CZTI

Data Quality Report

Orbit 51813

Creation date: 2025-04-27T09:10:16.786872
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/AS1A13_090T01_9000006464_51813cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51813cztM0_level2_quad_clean.evt
Size (bytes)537,940,80099,705,600
Size513.0 MB 95.1 MB
Events in quadrant A4,582,831647,491
Events in quadrant B3,741,833725,873
Events in quadrant C3,997,031640,937
Events in quadrant D7,056,220524,562

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181733
B0159763
C0166113
D0257483

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68882854.137631%
B68891251.814487%
C68891812.627377%
D6889110916.098127%

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 9013 6890 246 246 2.73% 3.57%
B 9014 6891 33 33 0.37% 0.48%
C 9014 6891 109 109 1.21% 1.58%
D 9014 6891 941 941 10.44% 13.66%

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 4 175 768050 4228.91 740 722 181.4
A 15 174 418682 2303.47 740 722 181.4
A 4 3 168232 923.18 740 722 181.4
B 0 171 151715 935.58 750 723 161.4
B 10 128 135286 833.78 750 723 161.4
B 10 254 75923 465.95 750 723 161.4
C 13 3 185841 913.26 739 734 202.7
C 15 192 179446 881.71 739 734 202.7
C 1 3 117300 575.1 739 734 202.7
D 11 129 3532717 18657.21 675 649 189.3
D 0 18 387064 2041.13 675 649 189.3
D 8 176 149529 786.42 675 649 189.3

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