ASTROSAT CZTI

Data Quality Report

Orbit 55674

Creation date: 2026-01-12T13:29:10.119849
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_021T06_9000006538_55674cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55674cztM0_level2_quad_clean.evt
Size (bytes)391,245,120101,422,080
Size373.1 MB 96.7 MB
Events in quadrant A4,166,498652,938
Events in quadrant B2,986,051701,713
Events in quadrant C3,501,323622,087
Events in quadrant D3,278,221602,020

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173613
B0145962
C0159792
D0152422

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70711191.682930%
B7071500.707114%
C70711231.739499%
D7071320.452553%

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 8726 7073 100 100 1.15% 1.41%
B 8726 7073 7 7 0.08% 0.10%
C 8726 7073 79 79 0.91% 1.12%
D 8726 7073 15 15 0.17% 0.21%

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 857323 4781.04 715 696 179.2
A 0 8 188324 1047.2 715 696 179.2
A 7 243 114850 637.12 715 696 179.2
B 7 0 53667 342.81 714 688 154.5
B 10 247 29118 183.96 714 688 154.5
B 0 171 24767 155.81 714 688 154.5
C 6 223 248240 1273.7 702 696 194.4
C 13 3 112482 575.18 702 696 194.4
C 9 38 102304 522.81 702 696 194.4
D 3 12 171093 842.54 704 670 202.3
D 7 129 90057 441.91 704 670 202.3
D 11 129 67459 330.19 704 670 202.3

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