ASTROSAT CZTI

Data Quality Report

Orbit 20171211_A04_124T01_9000001766_level2

Creation date: 2025-11-19T02:01:12.708135
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/AS1A04_124T01_9000001766cztM0_level2.fits modeM0/AS1A04_124T01_9000001766cztM0_level2_quad_clean.evt
Size (bytes)1,762,372,8002,542,711,680
Size1.6 GB 2.4 GB
Events in quadrant A10,531,10216,822,847
Events in quadrant B10,121,29616,625,479
Events in quadrant C10,554,21215,933,949
Events in quadrant D8,850,78814,328,149

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A039560
B039560
C039560
D039560

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02810
B02810
C02810
D02810

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04277190
B04827310
C03964430
D05037410

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19429432681.681987%
B19429486494.451501%
C19429411160.574387%
D19429484374.342388%

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 222366 194262 0 0 0.00% 0.00%
B 222366 194203 0 0 0.00% 0.00%
C 222366 194277 0 0 0.00% 0.00%
D 222366 193963 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 10437 11.46 2746 2575 685.8
A 7 110 8570 8.74 2746 2575 685.8
A 0 30 7971 7.87 2746 2575 685.8
B 2 9 8903 12.34 2674 2553 514.7
B 14 254 6906 8.46 2674 2553 514.7
B 5 128 6697 8.05 2674 2553 514.7
C 12 241 7646 7.05 2789 2594 716.8
C 2 191 7247 6.49 2789 2594 716.8
C 3 126 6880 5.98 2789 2594 716.8
D 3 14 6722 6.52 2530 2299 677.9
D 6 231 6595 6.34 2530 2299 677.9
D 7 5 6339 5.96 2530 2299 677.9

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