ASTROSAT CZTI

Data Quality Report

Orbit 55648

Creation date: 2026-01-21T20:21:02.854791
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_55648cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55648cztM0_level2_quad_clean.evt
Size (bytes)459,345,60093,758,400
Size438.1 MB 89.4 MB
Events in quadrant A6,105,916567,756
Events in quadrant B2,853,550676,807
Events in quadrant C3,142,086594,083
Events in quadrant D4,389,769541,038

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0226942
B0136622
C0145012
D0177082

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A658575511.465452%
B6585590.895976%
C6585751.138952%
D65853154.783599%

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 7700 6586 812 812 10.55% 12.33%
B 7700 6586 9 9 0.12% 0.14%
C 7700 6586 44 44 0.57% 0.67%
D 7700 6586 255 255 3.31% 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 12 115 3041559 18676.12 655 640 162.8
A 3 14 295782 1812.64 655 640 162.8
A 8 249 91137 555.8 655 640 162.8
B 0 171 43195 293.82 673 648 144.8
B 7 252 43155 293.55 673 648 144.8
B 5 248 32806 222.08 673 648 144.8
C 15 160 144471 799.44 657 649 179.9
C 6 223 124890 690.6 657 649 179.9
C 13 3 107221 592.39 657 649 179.9
D 11 129 763247 4201.4 639 610 181.5
D 2 62 310436 1706.84 639 610 181.5
D 10 181 284468 1563.78 639 610 181.5

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