ASTROSAT CZTI

Data Quality Report

Orbit 59176

Creation date: 2026-09-07T10:37:43.090455
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/AS1T05_271T01_9000006604_59176cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59176cztM0_level2_quad_clean.evt
Size (bytes)617,541,12097,398,720
Size588.9 MB 92.9 MB
Events in quadrant A3,267,046676,688
Events in quadrant B4,592,185700,219
Events in quadrant C3,542,257630,159
Events in quadrant D10,920,217458,617

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144962
B0184352
C0155172
D0373042

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69331121.615462%
B69333705.336795%
C69331732.495312%
D6933204129.438915%

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 7773 6934 8 8 0.10% 0.12%
B 7773 6934 106 106 1.36% 1.53%
C 7773 6934 113 113 1.45% 1.63%
D 7773 6934 1981 1981 25.49% 28.57%

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 3 245 58276 295.21 791 770 194.8
A 10 251 48956 247.37 791 770 194.8
A 15 233 47688 240.86 791 770 194.8
B 10 128 668035 4056.18 767 739 164.5
B 4 171 562694 3415.86 767 739 164.5
B 5 185 204205 1236.78 767 739 164.5
C 14 96 355666 1708.84 764 755 207.7
C 12 252 116397 556.8 764 755 207.7
C 12 250 31094 146.08 764 755 207.7
D 12 110 5755769 30169.9 670 638 190.8
D 2 31 1140066 5973.18 670 638 190.8
D 11 129 498444 2609.63 670 638 190.8

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

TCT plots

Parameter TCT0 TCT_healed
Tct