ASTROSAT CZTI

Data Quality Report

Orbit 55504

Creation date: 2025-12-31T18:52:09.974215
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_55504cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55504cztM0_level2_quad_clean.evt
Size (bytes)468,599,04084,522,240
Size446.9 MB 80.6 MB
Events in quadrant A3,435,460569,780
Events in quadrant B2,705,683617,110
Events in quadrant C7,300,846450,696
Events in quadrant D3,451,822515,094

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142153
B0122791
C0257802
D0142746

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A58162514.315681%
B58171472.527076%
C5816123921.303301%
D58151632.803095%

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 6942 5818 123 123 1.77% 2.11%
B 6942 5818 11 11 0.16% 0.19%
C 6941 5817 897 897 12.92% 15.42%
D 6941 5817 78 78 1.12% 1.34%

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 455776 2906.56 636 621 156.6
A 3 78 401741 2561.5 636 621 156.6
A 13 248 37587 236.06 636 621 156.6
B 10 247 97415 717.95 625 602 134.8
B 4 67 25545 184.97 625 602 134.8
B 5 172 25153 182.07 625 602 134.8
C 9 38 4354207 27782.39 570 564 156.7
C 15 147 175753 1117.95 570 564 156.7
C 13 3 166477 1058.76 570 564 156.7
D 8 160 258040 1477.8 617 586 174.2
D 11 129 252671 1446.98 617 586 174.2
D 6 239 237380 1359.21 617 586 174.2

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