ASTROSAT CZTI

Data Quality Report

Orbit 20201019_T03_249T01_9000003934_level2

Creation date: 2025-12-16T18:27:55.171030
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_249T01_9000003934cztM0_level2.fits modeM0/AS1T03_249T01_9000003934cztM0_level2_quad_clean.evt
Size (bytes)206,856,00079,433,280
Size197.3 MB 75.8 MB
Events in quadrant A1,321,042278,633
Events in quadrant B1,255,872280,144
Events in quadrant C1,272,388264,544
Events in quadrant D1,068,298232,852

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0412630
B0475140
C0413460
D0577140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03980
B03980
C03980
D03980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0410
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A195491400.716149%
B195496293.217556%
C195492501.278838%
D1954915047.693488%

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 23313 19546 0 0 0.00% 0.00%
B 23313 19546 0 0 0.00% 0.00%
C 23312 19544 0 0 0.00% 0.00%
D 23312 19440 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 1075 8.88 343 324 84.6
A 7 110 1013 8.14 343 324 84.6
A 9 19 941 7.29 343 324 84.6
B 2 9 989 9.93 332 318 67.5
B 5 128 849 7.86 332 318 67.5
B 5 255 841 7.74 332 318 67.5
C 1 80 936 7.08 336 315 87.7
C 1 81 915 6.84 336 315 87.7
C 3 234 910 6.79 336 315 87.7
D 3 14 784 6.16 304 279 82.0
D 7 3 781 6.12 304 279 82.0
D 15 46 778 6.08 304 279 82.0

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