ASTROSAT CZTI

Data Quality Report

Orbit 51682

Creation date: 2025-04-22T12:01:08.580858
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/AS1A13_031T01_9000006462_51682cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51682cztM0_level2_quad_clean.evt
Size (bytes)521,516,16087,909,120
Size497.4 MB 83.8 MB
Events in quadrant A4,637,129566,567
Events in quadrant B3,741,237641,300
Events in quadrant C6,855,366484,388
Events in quadrant D3,581,731530,378

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180841
B0154751
C0247181
D0153571

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62974727.495633%
B62981923.048587%
C6298134821.403620%
D62982714.302953%

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 7336 6297 385 385 5.25% 6.11%
B 7337 6298 101 101 1.38% 1.60%
C 7337 6298 1235 1235 16.83% 19.61%
D 7337 6298 244 244 3.33% 3.87%

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 7 64 1444652 9056.13 650 636 159.5
A 15 174 184587 1153.65 650 636 159.5
A 8 6 87982 547.79 650 636 159.5
B 5 172 616629 4368.38 658 635 141.0
B 0 171 99510 701.18 658 635 141.0
B 5 173 76432 537.52 658 635 141.0
C 15 189 3153729 19613.84 584 580 160.8
C 13 3 319588 1984.36 584 580 160.8
C 15 231 241011 1495.58 584 580 160.8
D 10 172 674843 3833.97 631 610 175.9
D 8 176 68385 385.4 631 610 175.9
D 2 249 61524 346.38 631 610 175.9

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