ASTROSAT CZTI

Data Quality Report

Orbit 57842

Creation date: 2026-06-07T02:08:11.565504
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_125T11_9000006582_57842cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57842cztM0_level2_quad_clean.evt
Size (bytes)618,344,64090,432,000
Size589.7 MB 86.2 MB
Events in quadrant A2,804,834632,199
Events in quadrant B2,942,389672,366
Events in quadrant C7,482,226509,910
Events in quadrant D9,170,651482,622

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01327313
B01342815
C02671054
D031801100

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6325400.632411%
B6323370.585165%
C6320104316.503165%
D6314103916.455496%

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 7420 6331 24 24 0.32% 0.38%
B 7420 6331 16 16 0.22% 0.25%
C 7419 6328 894 894 12.05% 14.13%
D 7420 6331 1161 1161 15.65% 18.34%

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 3 245 133103 790.35 677 660 167.6
A 3 14 34989 204.86 677 660 167.6
A 13 248 11349 63.79 677 660 167.6
B 5 185 105679 734.45 668 642 143.0
B 0 213 50120 345.96 668 642 143.0
B 0 153 21043 142.65 668 642 143.0
C 9 38 3409350 20563.44 602 596 165.8
C 15 224 942580 5682.55 602 596 165.8
C 15 208 347706 2093.95 602 596 165.8
D 12 110 5872956 33075.62 619 592 177.5
D 8 160 544493 3063.48 619 592 177.5
D 3 12 116124 650.72 619 592 177.5

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