ASTROSAT CZTI

Data Quality Report

Orbit 20210118_A10_021T08_9000004118_level2

Creation date: 2025-12-19T20:45:40.761125
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_021T08_9000004118cztM0_level2.fits modeM0/AS1A10_021T08_9000004118cztM0_level2_quad_clean.evt
Size (bytes)407,710,080134,213,760
Size388.8 MB 128.0 MB
Events in quadrant A2,598,620374,829
Events in quadrant B2,458,956377,903
Events in quadrant C2,529,272360,106
Events in quadrant D2,139,838327,606

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0830
B0830
C0830
D0830

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0812520
B0834410
C0818990
D01181550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07760
B07760
C07760
D07760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A381595221.367960%
B381596921.813465%
C381598932.340208%
D3815931118.152729%

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 46428 38152 0 0 0.00% 0.00%
B 46428 38139 0 0 0.00% 0.00%
C 46428 38147 0 0 0.00% 0.00%
D 46428 38104 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 0 29 2453 11.01 678 640 164.7
A 7 110 2010 8.32 678 640 164.7
A 9 19 1922 7.79 678 640 164.7
B 2 9 1960 10.54 650 623 126.9
B 5 128 1699 8.48 650 623 126.9
B 5 255 1618 7.84 650 623 126.9
C 1 80 1958 7.88 668 631 168.3
C 1 81 1923 7.68 668 631 168.3
C 3 126 1736 6.57 668 631 168.3
D 15 46 1567 6.36 610 559 158.4
D 6 67 1504 5.97 610 559 158.4
D 10 189 1489 5.87 610 559 158.4

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