ASTROSAT CZTI

Data Quality Report

Orbit 20220120_A11_059T05_9000004876_level2

Creation date: 2025-12-31T11:21:09.534427
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/AS1A11_059T05_9000004876cztM0_level2.fits modeM0/AS1A11_059T05_9000004876cztM0_level2_quad_clean.evt
Size (bytes)544,668,480428,281,920
Size519.4 MB 408.4 MB
Events in quadrant A3,459,2422,589,113
Events in quadrant B2,815,2221,726,810
Events in quadrant C3,354,2722,476,477
Events in quadrant D2,879,0282,197,625

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02240
B02240
C02240
D02240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01186110
B02632860
C01389370
D01680540

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011840
B011840
C011840
D011840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A57991600.103464%
B579902045835.278496%
C5799111011.898570%
D5799117102.948733%

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 78875 57989 0 0 0.00% 0.00%
B 78875 57975 0 0 0.00% 0.00%
C 78875 57981 0 0 0.00% 0.00%
D 78875 57977 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 7 110 2869 9.05 900 842 223.9
A 9 19 2823 8.85 900 842 223.9
A 0 29 2716 8.37 900 842 223.9
B 2 9 2478 12.12 744 712 145.7
B 3 80 2161 9.95 744 712 145.7
B 2 8 2029 9.04 744 712 145.7
C 1 81 2815 8.87 886 833 223.6
C 1 80 2756 8.6 886 833 223.6
C 3 203 2647 8.11 886 833 223.6
D 7 3 2150 6.35 824 751 220.3
D 10 113 2147 6.34 824 751 220.3
D 4 160 2088 6.07 824 751 220.3

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