ASTROSAT CZTI

Data Quality Report

Orbit 20210731_A10_094T73_9000004606_level2

Creation date: 2025-12-28T01:43:24.555948
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_094T73_9000004606cztM0_level2.fits modeM0/AS1A10_094T73_9000004606cztM0_level2_quad_clean.evt
Size (bytes)84,251,52060,937,920
Size80.3 MB 58.1 MB
Events in quadrant A545,268347,246
Events in quadrant B503,570337,474
Events in quadrant C524,010326,905
Events in quadrant D441,608295,574

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0210
B0210
C0210
D0210

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164370
B0246930
C0181020
D0261550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01580
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7744400.516529%
B76832162.811402%
C77391311.692725%
D76893684.786058%

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 11011 7809 0 0 0.00% 0.00%
B 10998 7753 0 0 0.00% 0.00%
C 11012 7797 0 0 0.00% 0.00%
D 11011 7749 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 29 491 9.76 142 136 36.4
A 7 110 433 8.17 142 136 36.4
A 9 19 420 7.81 142 136 36.4
B 2 9 379 8.93 133 129 28.0
B 3 80 362 8.32 133 129 28.0
B 5 128 353 8.0 133 129 28.0
C 1 81 418 7.9 138 132 36.2
C 1 80 409 7.65 138 132 36.2
C 3 203 407 7.59 138 132 36.2
D 15 47 342 6.54 126 116 34.5
D 15 63 333 6.28 126 116 34.5
D 7 3 333 6.28 126 116 34.5

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