ASTROSAT CZTI

Data Quality Report

Orbit 56516

Creation date: 2026-03-09T23:02:05.133833
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_060T01_9000006556_56516cztM0_level2.fits modeM0/AS1A14_060T01_9000006556_56516cztM0_level2_quad_clean.evt
Size (bytes)559,442,88091,699,200
Size533.5 MB 87.5 MB
Events in quadrant A5,395,138585,852
Events in quadrant B3,594,300669,564
Events in quadrant C6,051,023519,235
Events in quadrant D5,147,947534,408

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205571
B0151761
C0228081
D0199641

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67024907.311250%
B67031051.566463%
C6702102815.338705%
D67025177.714115%

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 7487 6702 417 417 5.57% 6.22%
B 7488 6703 30 30 0.40% 0.45%
C 7487 6703 1026 1026 13.70% 15.31%
D 7487 6703 458 458 6.12% 6.83%

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 7 64 1762868 10001.18 706 686 176.2
A 12 3 307668 1742.26 706 686 176.2
A 4 95 192477 1088.5 706 686 176.2
B 4 206 290020 1871.57 717 691 154.6
B 4 21 98862 635.03 717 691 154.6
B 3 145 89733 575.98 717 691 154.6
C 15 230 3019140 16889.7 648 642 178.7
C 13 3 209639 1169.42 648 642 178.7
C 12 252 102263 568.61 648 642 178.7
D 2 249 1057782 5482.06 674 643 192.8
D 7 96 360304 1865.11 674 643 192.8
D 8 129 342897 1774.84 674 643 192.8

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