ASTROSAT CZTI

Data Quality Report

Orbit 57581

Creation date: 2026-05-20T12:32:44.746045
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_9000006576_57581cztM0_level2.fits modeM0/AS1A14_070T08_9000006576_57581cztM0_level2_quad_clean.evt
Size (bytes)599,567,04090,089,280
Size571.8 MB 85.9 MB
Events in quadrant A2,936,368667,226
Events in quadrant B3,683,058699,076
Events in quadrant C10,692,756333,961
Events in quadrant D4,375,120573,373

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0134072
B0154252
C0362602
D0175022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0210
D0210

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6512640.982801%
B65113074.715098%
C6512345953.117322%
D65123595.512899%

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 7632 6513 0 0 0.00% 0.00%
B 7632 6513 176 176 2.31% 2.70%
C 7632 6512 2444 2444 32.02% 37.53%
D 7632 6513 269 269 3.52% 4.13%

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 3 250 49651 272.38 731 712 179.7
A 3 14 24845 134.32 731 712 179.7
A 4 249 19337 103.66 731 712 179.7
B 2 249 666616 4435.25 713 685 150.1
B 7 252 43874 287.65 713 685 150.1
B 4 201 35335 230.78 713 685 150.1
C 12 254 7484756 54901.15 503 497 136.3
C 15 224 973751 7139.35 503 497 136.3
C 14 254 102231 746.27 503 497 136.3
D 15 142 921207 4691.27 698 666 196.2
D 11 247 225884 1147.76 698 666 196.2
D 2 252 150769 764.96 698 666 196.2

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