ASTROSAT CZTI

Data Quality Report

Orbit 20181031_A05_059T04_9000002476_level2

Creation date: 2025-11-25T13:44:16.784181
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/AS1A05_059T04_9000002476cztM0_level2.fits modeM0/AS1A05_059T04_9000002476cztM0_level2_quad_clean.evt
Size (bytes)89,167,680105,661,440
Size85.0 MB 100.8 MB
Events in quadrant A540,460652,787
Events in quadrant B528,634684,461
Events in quadrant C530,982635,856
Events in quadrant D469,440595,335

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0248700
B0206890
C0240870
D0214290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01860
B01860
C01860
D01860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A90925415.950286%
B90921601.759789%
C90922422.661681%
D90921381.517818%

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 11382 9092 0 0 0.00% 0.00%
B 11382 9092 0 0 0.00% 0.00%
C 11382 9092 0 0 0.00% 0.00%
D 11382 9092 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 29 544 11.09 140 133 37.1
A 7 110 407 7.39 140 133 37.1
A 0 30 403 7.29 140 133 37.1
B 2 9 383 8.47 140 135 29.3
B 14 254 373 8.13 140 135 29.3
B 3 17 356 7.55 140 135 29.3
C 1 81 397 7.02 140 132 37.7
C 3 158 377 6.49 140 132 37.7
C 1 80 372 6.36 140 132 37.7
D 4 246 364 6.56 133 121 37.0
D 10 189 356 6.34 133 121 37.0
D 6 67 347 6.1 133 121 37.0

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