ASTROSAT CZTI

Data Quality Report

Orbit 55985

Creation date: 2026-02-06T09:28:43.255662
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_066T02_9000006546_55985cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55985cztM0_level2_quad_clean.evt
Size (bytes)528,943,68092,257,920
Size504.4 MB 88.0 MB
Events in quadrant A7,781,533532,139
Events in quadrant B4,209,181651,181
Events in quadrant C3,332,595595,680
Events in quadrant D3,750,330559,566

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0276682
B0171972
C0149012
D0157982

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6523114617.568603%
B65232824.323164%
C6523350.536563%
D6523941.441055%

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 7608 6524 1193 1193 15.68% 18.29%
B 7608 6524 250 250 3.29% 3.83%
C 7608 6524 15 15 0.20% 0.23%
D 7608 6524 88 88 1.16% 1.35%

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 4622285 28202.5 655 637 163.9
A 7 64 284300 1730.99 655 637 163.9
A 3 14 93621 567.41 655 637 163.9
B 5 172 973177 6539.03 687 661 148.7
B 2 249 106511 711.72 687 661 148.7
B 5 32 94888 633.57 687 661 148.7
C 9 38 438828 2341.13 679 672 187.2
C 14 246 59441 314.01 679 672 187.2
C 11 244 33122 173.39 679 672 187.2
D 11 129 644385 3332.62 671 641 193.2
D 2 249 157187 810.43 671 641 193.2
D 6 239 74905 384.46 671 641 193.2

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