ASTROSAT CZTI

Data Quality Report

Orbit 51420

Creation date: 2025-03-31T20:36:21.169174
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/AS1A13_090T01_9000006458_51420cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51420cztM0_level2_quad_clean.evt
Size (bytes)726,687,36082,488,960
Size693.0 MB 78.7 MB
Events in quadrant A5,524,085575,371
Events in quadrant B4,244,086661,266
Events in quadrant C13,120,399239,154
Events in quadrant D3,503,093565,267

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0208711
B0170651
C0434781
D0149602

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65476169.408890%
B65472884.398961%
C6548428265.394013%
D65471301.985642%

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 7537 6547 369 369 4.90% 5.64%
B 7537 6547 122 122 1.62% 1.86%
C 7538 6548 3630 3630 48.16% 55.44%
D 7537 6548 51 51 0.68% 0.78%

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 3 638622 3769.22 693 678 169.3
A 12 250 614954 3629.38 693 678 169.3
A 15 174 431097 2543.08 693 678 169.3
B 5 185 398208 2641.38 707 681 150.5
B 10 14 277677 1840.51 707 681 150.5
B 10 254 159957 1058.31 707 681 150.5
C 15 179 3172475 27171.65 422 418 116.7
C 4 12 2877722 24646.82 422 418 116.7
C 15 230 2668195 22852.02 422 418 116.7
D 3 12 135504 699.49 699 673 192.8
D 2 153 110759 571.12 699 673 192.8
D 7 96 91647 471.96 699 673 192.8

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