ASTROSAT CZTI

Data Quality Report

Orbit 55417

Creation date: 2025-12-25T22:37:34.039800
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_099T01_9000006536_55417cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55417cztM0_level2_quad_clean.evt
Size (bytes)614,859,84076,371,840
Size586.4 MB 72.8 MB
Events in quadrant A2,676,879605,956
Events in quadrant B2,777,785638,138
Events in quadrant C3,770,128523,586
Events in quadrant D13,068,460126,236

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0124291
B0126752
C0157731
D0429121

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5992701.168224%
B59921011.685581%
C59925388.978638%
D5992479379.989987%

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 7162 5993 7 7 0.10% 0.12%
B 7162 5993 21 21 0.29% 0.35%
C 7162 5993 372 372 5.19% 6.21%
D 7161 5990 3967 3967 55.40% 66.23%

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 0 8 44599 271.77 648 632 161.8
A 12 3 37217 226.14 648 632 161.8
A 13 254 18586 110.98 648 632 161.8
B 5 236 115824 869.72 633 611 132.5
B 5 185 61512 459.73 633 611 132.5
B 5 255 34088 252.71 633 611 132.5
C 12 252 1146107 6868.37 604 596 166.8
C 13 3 225988 1351.43 604 596 166.8
C 12 250 17402 100.77 604 596 166.8
D 11 129 11566694 136655.31 298 284 84.6
D 2 249 89549 1054.65 298 284 84.6
D 11 176 61043 717.86 298 284 84.6

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