ASTROSAT CZTI

Data Quality Report

Orbit 55596

Creation date: 2026-01-07T20:49:16.862893
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_021T06_9000006538_55596cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55596cztM0_level2_quad_clean.evt
Size (bytes)566,530,56094,086,720
Size540.3 MB 89.7 MB
Events in quadrant A3,947,430642,162
Events in quadrant B3,457,736692,473
Events in quadrant C8,843,968460,130
Events in quadrant D4,175,783564,341

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169782
B0156750
C0311540
D0175120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70301712.432432%
B7031680.967145%
C7031197628.104110%
D70312263.214337%

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 7030 7030 160 160 2.28% 2.28%
B 7031 7031 41 41 0.58% 0.58%
C 7031 7031 1949 1949 27.72% 27.72%
D 7031 7031 203 203 2.89% 2.89%

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 8 249 679100 3789.38 715 698 179.0
A 0 8 263075 1465.57 715 698 179.0
A 4 159 118687 659.06 715 698 179.0
B 7 0 266584 1738.08 709 682 153.0
B 0 171 232594 1515.91 709 682 153.0
B 5 236 36440 233.73 709 682 153.0
C 9 38 5647760 32432.3 639 631 174.1
C 13 16 373672 2142.43 639 631 174.1
C 10 19 74023 421.5 639 631 174.1
D 2 249 478433 2459.98 691 661 194.2
D 10 181 328371 1687.33 691 661 194.2
D 9 19 148771 762.6 691 661 194.2

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