ASTROSAT CZTI

Data Quality Report

Orbit 57246

Creation date: 2026-04-30T17:32:25.045574
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_070T08_9000006568_57246cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57246cztM0_level2_quad_clean.evt
Size (bytes)419,005,44087,393,600
Size399.6 MB 83.3 MB
Events in quadrant A4,480,110554,635
Events in quadrant B3,569,782612,434
Events in quadrant C4,091,010536,754
Events in quadrant D2,902,671523,205

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0175131
B0149201
C0165651
D0129991

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59993746.234372%
B60002213.683333%
C60002454.083333%
D6000320.533333%

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 7114 6000 336 336 4.72% 5.60%
B 7115 6001 152 152 2.14% 2.53%
C 7115 6000 209 209 2.94% 3.48%
D 7115 6001 31 31 0.44% 0.52%

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 7 64 1987451 12808.97 622 605 155.1
A 4 13 39099 248.16 622 605 155.1
A 3 46 14737 91.1 622 605 155.1
B 5 185 554700 4156.58 618 596 133.3
B 10 16 147547 1102.35 618 596 133.3
B 7 252 146684 1095.87 618 596 133.3
C 15 224 1314575 8021.44 597 591 163.8
C 12 252 184513 1122.78 597 591 163.8
C 12 254 100452 609.62 597 591 163.8
D 3 224 121813 710.11 604 578 170.7
D 8 240 73568 427.53 604 578 170.7
D 7 96 60176 349.08 604 578 170.7

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