ASTROSAT CZTI

Data Quality Report

Orbit 51817

Creation date: 2025-04-27T14:44:50.243604
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_090T01_9000006464_51817cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51817cztM0_level2_quad_clean.evt
Size (bytes)648,083,52092,410,560
Size618.1 MB 88.1 MB
Events in quadrant A4,391,323633,707
Events in quadrant B4,198,582694,987
Events in quadrant C4,310,646608,014
Events in quadrant D10,555,524382,148

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177431
B0171441
C0176361
D0361151

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68802103.052326%
B68812353.415201%
C68803404.941860%
D6880269639.186047%

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 7570 6881 46 46 0.61% 0.67%
B 7571 6882 37 37 0.49% 0.54%
C 7570 6881 219 219 2.89% 3.18%
D 7570 6881 2328 2328 30.75% 33.83%

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 4 175 414106 2252.36 750 731 183.5
A 15 174 337136 1832.97 750 731 183.5
A 12 3 232199 1261.2 750 731 183.5
B 1 207 292102 1825.58 742 715 159.6
B 4 81 194282 1212.72 742 715 159.6
B 0 171 119939 746.96 742 715 159.6
C 15 218 450656 2249.14 728 723 200.0
C 12 254 314569 1568.86 728 723 200.0
C 15 224 112677 559.64 728 723 200.0
D 11 129 6631922 39670.26 601 580 167.2
D 0 18 1098367 6567.22 601 580 167.2
D 3 12 155101 924.38 601 580 167.2

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