ASTROSAT CZTI

Data Quality Report

Orbit 56171

Creation date: 2026-02-14T16:17:57.896149
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_083T04_9000006550_56171cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56171cztM0_level2_quad_clean.evt
Size (bytes)504,374,40096,649,920
Size481.0 MB 92.2 MB
Events in quadrant A5,846,289594,519
Events in quadrant B4,059,973684,438
Events in quadrant C3,507,910625,148
Events in quadrant D4,746,295565,073

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0218432
B0164012
C0151862
D0186192

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A656382512.570471%
B65634226.429986%
C65631932.940728%
D65634286.521408%

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 7668 6564 589 589 7.68% 8.97%
B 7668 6564 193 193 2.52% 2.94%
C 7668 6564 109 109 1.42% 1.66%
D 7668 6564 275 275 3.59% 4.19%

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 1375510 7887.69 703 685 174.3
A 9 250 718084 4115.89 703 685 174.3
A 7 64 503223 2883.18 703 685 174.3
B 4 156 478267 3152.74 712 687 151.5
B 5 185 405554 2672.73 712 687 151.5
B 5 172 101413 664.94 712 687 151.5
C 1 157 327281 1668.75 717 709 195.7
C 12 254 158671 807.17 717 709 195.7
C 12 252 77548 392.64 717 709 195.7
D 8 240 871043 4430.67 700 670 196.4
D 8 129 566999 2882.92 700 670 196.4
D 11 129 224736 1140.62 700 670 196.4

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