ASTROSAT CZTI

Data Quality Report

Orbit 20181215_T03_030T01_9000002574_level2

Creation date: 2025-11-26T16:05:04.339089
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/AS1T03_030T01_9000002574cztM0_level2.fits modeM0/AS1T03_030T01_9000002574cztM0_level2_quad_clean.evt
Size (bytes)1,070,262,7201,002,695,040
Size1020.7 MB 956.2 MB
Events in quadrant A6,716,3646,197,936
Events in quadrant B6,390,5706,152,227
Events in quadrant C6,391,5365,802,272
Events in quadrant D5,347,7964,651,597

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02287300
B02350920
C02360120
D03808520

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A021700
B021700
C021700
D021700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11059610360.936743%
B11059615731.422294%
C11059614841.341821%
D1105961228611.108901%

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 127386 110589 0 0 0.00% 0.00%
B 127386 110587 0 0 0.00% 0.00%
C 127386 110591 0 0 0.00% 0.00%
D 127386 110335 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 5531 9.06 1746 1635 430.2
A 7 110 5439 8.84 1746 1635 430.2
A 9 19 5040 7.91 1746 1635 430.2
B 2 9 5178 10.72 1688 1609 332.9
B 3 80 4335 8.19 1688 1609 332.9
B 2 8 4289 8.05 1688 1609 332.9
C 1 80 4952 7.79 1688 1573 433.8
C 1 81 4840 7.53 1688 1573 433.8
C 12 241 4444 6.62 1688 1573 433.8
D 3 14 3860 6.15 1526 1392 401.3
D 10 189 3766 5.92 1526 1392 401.3
D 6 231 3722 5.81 1526 1392 401.3

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