ASTROSAT CZTI

Data Quality Report

Orbit 55805

Creation date: 2026-01-21T02:33:39.763311
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/AS1A14_127T10_9000006542_55805cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55805cztM0_level2_quad_clean.evt
Size (bytes)546,197,760108,826,560
Size520.9 MB 103.8 MB
Events in quadrant A8,434,376646,786
Events in quadrant B3,057,894795,770
Events in quadrant C3,544,233701,068
Events in quadrant D4,649,770674,345

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298722
B0148182
C0162213
D0188962

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6855133019.401896%
B6855550.802334%
C68541812.640794%
D68543294.800117%

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 7810 6856 1313 1313 16.81% 19.15%
B 7810 6856 17 17 0.22% 0.25%
C 7809 6855 121 121 1.55% 1.77%
D 7809 6855 340 340 4.35% 4.96%

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 12 115 3173703 17778.66 670 654 178.5
A 15 32 1796908 10064.45 670 654 178.5
A 7 64 273253 1527.38 670 654 178.5
B 0 153 84915 537.65 706 683 156.7
B 10 247 65627 414.54 706 683 156.7
B 0 213 59371 374.6 706 683 156.7
C 13 3 706420 3586.44 687 679 196.8
C 6 223 97700 493.04 687 679 196.8
C 12 252 24785 122.5 687 679 196.8
D 7 70 1463835 7059.09 695 662 207.3
D 3 12 135222 649.19 695 662 207.3
D 8 245 86640 414.8 695 662 207.3

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