ASTROSAT CZTI

Data Quality Report

Orbit 55387

Creation date: 2025-12-23T22:09:37.907809
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_009T01_9000006534_55387cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55387cztM0_level2_quad_clean.evt
Size (bytes)403,038,720103,890,240
Size384.4 MB 99.1 MB
Events in quadrant A3,674,925682,876
Events in quadrant B3,096,037732,255
Events in quadrant C3,389,398652,153
Events in quadrant D4,230,640605,221

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0156072
B0141342
C0150382
D0172982

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67871592.342714%
B67881021.502652%
C6787961.414469%
D67872744.037130%

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 7927 6787 48 48 0.61% 0.71%
B 7928 6788 3 3 0.04% 0.04%
C 7927 6787 55 55 0.69% 0.81%
D 7927 6787 206 206 2.60% 3.04%

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 4 159 461293 2488.38 753 735 185.1
A 0 8 210004 1130.67 753 735 185.1
A 3 78 15593 80.28 753 735 185.1
B 10 247 40079 246.9 740 714 159.4
B 0 199 29138 178.28 740 714 159.4
B 2 30 24791 151.01 740 714 159.4
C 13 3 361403 1800.9 729 724 200.3
C 14 254 63038 311.14 729 724 200.3
C 9 38 56591 278.95 729 724 200.3
D 8 160 685665 3392.5 725 695 201.9
D 11 129 243569 1202.9 725 695 201.9
D 2 249 161473 796.3 725 695 201.9

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