ASTROSAT CZTI

Data Quality Report

Orbit 55255

Creation date: 2025-12-15T00:40:17.483153
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_009T01_9000006534_55255cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55255cztM0_level2_quad_clean.evt
Size (bytes)414,872,64099,123,840
Size395.7 MB 94.5 MB
Events in quadrant A3,136,342650,008
Events in quadrant B3,107,213696,507
Events in quadrant C5,273,118595,917
Events in quadrant D3,314,160587,729

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144632
B0142552
C0204122
D0147432

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6766751.108484%
B6765771.138211%
C67654516.666667%
D6765610.901700%

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 7821 6767 38 38 0.49% 0.56%
B 7820 6766 21 21 0.27% 0.31%
C 7820 6766 339 339 4.34% 5.01%
D 7820 6766 29 29 0.37% 0.43%

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 8 180755 1024.15 716 698 175.8
A 7 14 68192 383.9 716 698 175.8
A 3 14 29855 165.84 716 698 175.8
B 10 247 78870 511.56 705 680 152.8
B 7 0 73217 474.57 705 680 152.8
B 0 182 50551 326.28 705 680 152.8
C 13 3 1906032 10211.89 680 672 186.6
C 1 16 248720 1329.43 680 672 186.6
C 10 22 148158 790.46 680 672 186.6
D 7 129 123235 619.9 700 671 197.7
D 3 12 102222 513.62 700 671 197.7
D 2 249 76941 385.75 700 671 197.7

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