ASTROSAT CZTI

Data Quality Report

Orbit 55766

Creation date: 2026-01-19T13:13:53.897681
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_099T04_9000006540_55766cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55766cztM0_level2_quad_clean.evt
Size (bytes)555,572,16094,279,680
Size529.8 MB 89.9 MB
Events in quadrant A6,829,891565,625
Events in quadrant B2,852,383691,982
Events in quadrant C5,578,172578,761
Events in quadrant D4,803,888567,591

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0247342
B0133012
C0209112
D0188127

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A646090914.071207%
B6460260.402477%
C646066510.294118%
D64592243.468029%

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 7695 6460 798 798 10.37% 12.35%
B 7695 6461 3 3 0.04% 0.05%
C 7695 6461 739 739 9.60% 11.44%
D 7693 6459 220 220 2.86% 3.41%

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 15 32 3047626 18775.62 658 642 162.3
A 7 64 423331 2604.62 658 642 162.3
A 12 115 246258 1513.49 658 642 162.3
B 2 249 54973 363.46 695 669 149.4
B 12 111 18301 118.01 695 669 149.4
B 11 111 16944 108.93 695 669 149.4
C 12 249 1477323 8104.44 665 661 182.2
C 9 38 819693 4495.14 665 661 182.2
C 1 16 309519 1695.12 665 661 182.2
D 11 129 1683885 8844.61 667 636 190.3
D 7 70 293372 1538.18 667 636 190.3
D 7 129 64632 336.26 667 636 190.3

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