ASTROSAT CZTI

Data Quality Report

Orbit 51798

Creation date: 2025-04-26T07:31:04.964008
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_090T01_9000006464_51798cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51798cztM0_level2_quad_clean.evt
Size (bytes)684,460,80093,562,560
Size652.8 MB 89.2 MB
Events in quadrant A7,582,888534,702
Events in quadrant B4,962,204690,247
Events in quadrant C5,433,743614,251
Events in quadrant D6,826,444515,361

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0271502
B0194982
C0208702
D0250442

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6859142620.790203%
B68604226.151603%
C68603024.402332%
D6860105215.335277%

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 8929 6861 1381 1381 15.47% 20.13%
B 8929 6860 262 262 2.93% 3.82%
C 8930 6862 264 264 2.96% 3.85%
D 8930 6861 1010 1010 11.31% 14.72%

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 15 174 2846499 17402.85 653 637 163.5
A 7 64 890076 5439.05 653 637 163.5
A 12 3 492878 3010.12 653 637 163.5
B 10 128 749729 4786.23 724 697 156.5
B 5 32 279827 1783.61 724 697 156.5
B 0 171 228764 1457.32 724 697 156.5
C 10 22 1000149 5074.57 713 709 197.0
C 15 218 516773 2620.27 713 709 197.0
C 15 192 426375 2161.28 713 709 197.0
D 11 129 2802994 15351.98 657 634 182.5
D 8 176 692360 3789.43 657 634 182.5
D 3 12 286214 1564.47 657 634 182.5

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