ASTROSAT CZTI

Data Quality Report

Orbit 51451

Creation date: 2025-04-02T23:09:07.078476
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_51451cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51451cztM0_level2_quad_clean.evt
Size (bytes)613,572,48091,915,200
Size585.1 MB 87.7 MB
Events in quadrant A4,979,364608,021
Events in quadrant B3,962,641690,117
Events in quadrant C8,272,874465,012
Events in quadrant D4,992,025564,996

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192122
B0161662
C0290232
D0193942

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65185648.652961%
B65172644.050944%
C6517189829.123830%
D65173605.524014%

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 7662 6518 279 279 3.64% 4.28%
B 7661 6517 107 107 1.40% 1.64%
C 7661 6517 1887 1887 24.63% 28.96%
D 7661 6517 321 321 4.19% 4.93%

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 451731 2596.46 715 699 173.7
A 15 174 314477 1806.33 715 699 173.7
A 8 63 189807 1088.64 715 699 173.7
B 5 185 465059 3018.96 724 701 153.8
B 7 252 96711 624.2 724 701 153.8
B 15 52 91191 588.31 724 701 153.8
C 4 12 4633232 28852.78 576 570 160.6
C 13 3 426708 2654.04 576 570 160.6
C 3 233 285691 1775.77 576 570 160.6
D 8 176 1652909 8540.03 698 676 193.5
D 11 176 157127 808.66 698 676 193.5
D 10 181 76587 392.37 698 676 193.5

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