ASTROSAT CZTI

Data Quality Report

Orbit 55821

Creation date: 2026-01-22T04:37:18.512552
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_127T10_9000006542_55821cztM0_level2.fits modeM0/AS1A14_127T10_9000006542_55821cztM0_level2_quad_clean.evt
Size (bytes)669,240,00088,151,040
Size638.2 MB 84.1 MB
Events in quadrant A5,423,425600,261
Events in quadrant B3,066,132700,638
Events in quadrant C3,040,673633,245
Events in quadrant D12,720,996267,376

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0209072
B0145202
C0146232
D0424393

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A670986112.833507%
B6709751.117901%
C6709570.849605%
D6708405360.420394%

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 7704 6710 797 797 10.35% 11.88%
B 7704 6710 19 19 0.25% 0.28%
C 7704 6710 37 37 0.48% 0.55%
D 7703 6708 3901 3901 50.64% 58.15%

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 1866366 11107.45 658 641 168.0
A 8 249 276877 1644.55 658 641 168.0
A 8 192 167634 994.18 658 641 168.0
B 0 213 284805 1920.52 679 656 148.0
B 0 199 31677 209.67 679 656 148.0
B 10 247 22970 150.82 679 656 148.0
C 12 4 174271 917.7 673 664 189.2
C 10 22 81434 426.96 673 664 189.2
C 13 3 66044 345.6 673 664 189.2
D 2 62 10729456 91544.91 402 384 117.2
D 11 129 168478 1434.25 402 384 117.2
D 8 160 92374 784.9 402 384 117.2

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