ASTROSAT CZTI

Data Quality Report

Orbit 51856

Creation date: 2025-04-30T10:18:39.292186
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/AS1C09_011T05_9000006466_51856cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51856cztM0_level2_quad_clean.evt
Size (bytes)728,965,44087,287,040
Size695.2 MB 83.2 MB
Events in quadrant A7,493,271567,009
Events in quadrant B4,820,645670,987
Events in quadrant C3,451,657604,895
Events in quadrant D10,715,330346,661

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0268934
B0186982
C0149462
D0363602

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A650269010.612119%
B65021502.306982%
C6502761.168871%
D6502285543.909566%

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 7583 6504 654 654 8.62% 10.06%
B 7583 6504 102 102 1.35% 1.57%
C 7583 6504 47 47 0.62% 0.72%
D 7583 6504 2736 2736 36.08% 42.07%

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 2051393 12487.85 656 640 164.2
A 0 228 1321803 8045.09 656 640 164.2
A 3 63 466930 2839.43 656 640 164.2
B 10 254 671791 4677.26 679 657 143.5
B 10 44 434740 3025.21 679 657 143.5
B 1 255 205695 1428.95 679 657 143.5
C 13 3 198485 1054.98 674 668 187.5
C 15 192 128560 682.06 674 668 187.5
C 15 224 106765 565.83 674 668 187.5
D 11 129 7481459 52869.42 506 487 141.5
D 0 18 655283 4627.57 506 487 141.5
D 9 49 87809 617.12 506 487 141.5

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