ASTROSAT CZTI

Data Quality Report

Orbit 57266

Creation date: 2026-04-29T08:38:52.908731
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_049T03_9000006570_57266cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57266cztM0_level2_quad_clean.evt
Size (bytes)519,563,52091,929,600
Size495.5 MB 87.7 MB
Events in quadrant A3,607,434589,487
Events in quadrant B3,841,140637,556
Events in quadrant C6,971,551522,487
Events in quadrant D4,229,383511,791

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157692
B0171042
C0260574
D0181662

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A75001401.866667%
B75002653.533333%
C7499104013.868516%
D75002943.920000%

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 7978 7787 5 5 0.06% 0.06%
B 7978 7787 44 44 0.55% 0.57%
C 7977 7786 793 793 9.94% 10.18%
D 7978 7787 159 159 1.99% 2.04%

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 8 4 388112 1947.29 810 789 198.9
A 3 14 19861 95.89 810 789 198.9
A 11 208 19546 94.3 810 789 198.9
B 5 172 309674 1833.24 791 761 168.5
B 10 16 116658 687.79 791 761 168.5
B 7 252 51618 301.81 791 761 168.5
C 15 224 3830584 18957.2 743 733 202.0
C 14 246 79219 388.49 743 733 202.0
C 14 254 60372 295.2 743 733 202.0
D 2 249 560539 2580.67 776 742 216.9
D 7 96 168053 771.31 776 742 216.9
D 8 240 111504 510.61 776 742 216.9

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