ASTROSAT CZTI

Data Quality Report

Orbit 55662

Creation date: 2026-01-12T11:35:06.555849
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_55662cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55662cztM0_level2_quad_clean.evt
Size (bytes)410,806,080104,734,080
Size391.8 MB 99.9 MB
Events in quadrant A4,483,308650,965
Events in quadrant B2,963,307735,005
Events in quadrant C3,480,636673,127
Events in quadrant D3,760,085647,535

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182332
B0140472
C0155112
D0162682

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66753935.887640%
B6675370.554307%
C66751001.498127%
D6675671.003745%

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 7755 6676 352 352 4.54% 5.27%
B 7755 6676 14 14 0.18% 0.21%
C 7755 6676 86 86 1.11% 1.29%
D 7755 6676 66 66 0.85% 0.99%

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 12 115 811153 4627.05 686 668 175.2
A 0 8 412350 2350.29 686 668 175.2
A 15 32 306697 1747.11 686 668 175.2
B 5 172 68826 456.46 696 672 149.3
B 7 252 48379 319.52 696 672 149.3
B 9 251 47957 316.69 696 672 149.3
C 13 3 437841 2231.7 691 683 195.9
C 10 19 110559 560.92 691 683 195.9
C 12 252 81461 412.37 691 683 195.9
D 8 245 726218 3619.41 689 658 200.5
D 3 12 117808 584.4 689 658 200.5
D 2 252 87834 434.87 689 658 200.5

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