ASTROSAT CZTI

Data Quality Report

Orbit 20210526_A10_021T09_9000004410_level2

Creation date: 2021-05-28T10:20:08.652928
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/AS1A10_021T09_9000004410cztM0_level2_bc.evt modeM0/AS1A10_021T09_9000004410cztM0_level2_quad_clean.evt
Size (bytes)2,101,904,640437,843,520
Size2.0 GB 417.6 MB
Events in quadrant A9,656,0252,869,035
Events in quadrant B17,491,9342,829,470
Events in quadrant C9,667,8932,692,005
Events in quadrant D24,494,7232,496,584

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0795360
B01056170
C0813920
D01305360

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0560
B0560
C0560
D0560

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07040
B07040
C07040
D07040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A345416031.745751%
B345414681.354912%
C3454115214.403463%
D3454130198.740338%

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 40191 34542 41 41 0.10% 0.12%
B 40191 34541 10 10 0.02% 0.03%
C 40191 34540 17 17 0.04% 0.05%
D 40191 34539 446 446 1.11% 1.29%

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 0 13 1957722 4577.83 1977 1951 427.2
A 8 192 64346 146.05 1977 1951 427.2
A 13 254 59899 135.64 1977 1951 427.2
B 6 159 9415623 25272.61 1965 1922 372.5
B 0 229 295400 787.89 1965 1922 372.5
B 0 190 76716 200.8 1965 1922 372.5
C 15 208 1704121 3937.28 1841 1841 432.3
C 3 233 349727 804.64 1841 1841 432.3
C 0 10 319360 734.4 1841 1841 432.3
D 8 195 12781691 30206.45 1847 1795 423.1
D 12 218 2044092 4827.16 1847 1795 423.1
D 1 52 1324271 3125.79 1847 1795 423.1

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