ASTROSAT CZTI

Data Quality Report

Orbit 52873

Creation date: 2025-07-16T11:48:12.704337
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/AS1C09_011T08_9000006482_52873cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52873cztM0_level2_quad_clean.evt
Size (bytes)912,669,12062,400,960
Size870.4 MB 59.5 MB
Events in quadrant A14,470,12227,887
Events in quadrant B9,305,150393,197
Events in quadrant C4,642,607528,969
Events in quadrant D4,902,783520,849

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0470355
B0317601
C0180881
D0187241

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5987579796.826457%
B5987255442.659095%
C59874747.917154%
D59883666.112224%

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 7087 5987 5381 5381 75.93% 89.88%
B 7087 5987 2048 2048 28.90% 34.21%
C 7087 5988 445 445 6.28% 7.43%
D 7088 5988 345 345 4.87% 5.76%

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 9 191 13146358 186314.54 268 261 70.6
A 14 32 73848 1042.92 268 261 70.6
A 0 8 62700 884.92 268 261 70.6
B 8 3 6004583 53610.35 529 514 112.0
B 7 0 529855 4726.49 529 514 112.0
B 10 254 308158 2746.95 529 514 112.0
C 7 80 1077899 6577.32 592 586 163.8
C 2 12 364629 2222.59 592 586 163.8
C 13 3 310707 1893.38 592 586 163.8
D 15 125 723368 4166.81 604 577 173.5
D 8 48 638812 3679.35 604 577 173.5
D 3 224 252352 1451.46 604 577 173.5

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