ASTROSAT CZTI

Data Quality Report

Orbit 51551

Creation date: 2025-04-09T17:19:25.232949
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/AS1A13_037T05_9000006460_51551cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51551cztM0_level2_quad_clean.evt
Size (bytes)707,849,280111,490,560
Size675.1 MB 106.3 MB
Events in quadrant A8,024,060711,645
Events in quadrant B6,465,140763,351
Events in quadrant C4,278,256720,506
Events in quadrant D6,831,870638,453

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0292762
B0244182
C0182842
D0256952

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77927359.432752%
B779284610.857290%
C77912923.747914%
D77917729.908869%

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 9707 7792 451 451 4.65% 5.79%
B 9707 7794 634 634 6.53% 8.13%
C 9706 7792 172 172 1.77% 2.21%
D 9706 7792 682 682 7.03% 8.75%

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 1925144 9149.93 845 825 210.3
A 12 250 763112 3624.59 845 825 210.3
A 15 32 502000 2383.03 845 825 210.3
B 10 44 2284970 12956.89 827 799 176.3
B 0 171 208596 1178.72 827 799 176.3
B 5 173 133767 754.26 827 799 176.3
C 13 3 586960 2525.41 842 835 232.1
C 15 1 181468 778.29 842 835 232.1
C 3 233 50112 212.32 842 835 232.1
D 8 176 1490309 6491.01 817 789 229.5
D 6 42 1032373 4495.42 817 789 229.5
D 12 6 677267 2947.95 817 789 229.5

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