ASTROSAT CZTI

Data Quality Report

Orbit 58663

Creation date: 2026-08-01T10:17:00.774876
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_004T06_9000006594_58663cztM0_level2.fits modeM0/AS1A14_004T06_9000006594_58663cztM0_level2_quad_clean.evt
Size (bytes)2,815,790,400461,338,560
Size2.6 GB 440.0 MB
Events in quadrant A18,064,5143,174,885
Events in quadrant B17,579,1693,404,607
Events in quadrant C20,538,9733,048,118
Events in quadrant D45,492,9692,067,843

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A078217870
B076765857
C0857611575
D01606342640

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06748
B06748
C06737
D067311

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0380
B0380
C0380
D0380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A331307502.263809%
B331427202.172470%
C3307712913.903014%
D329641095733.239291%

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 37734 33339 538 538 1.43% 1.61%
B 37734 33342 305 305 0.81% 0.91%
C 37735 33289 940 940 2.49% 2.82%
D 37734 33173 10452 10452 27.70% 31.51%

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 10 17 1643220 1860.83 3598 3513 881.2
A 10 251 886715 1002.31 3598 3513 881.2
A 3 14 799889 903.77 3598 3513 881.2
B 5 185 1607454 2135.0 3562 3427 751.3
B 0 171 435640 575.29 3562 3427 751.3
B 0 186 287960 378.72 3562 3427 751.3
C 15 217 1467988 1528.88 3505 3475 957.9
C 12 254 1372016 1428.69 3505 3475 957.9
C 15 147 1361629 1417.85 3505 3475 957.9
D 11 129 19137445 23172.43 2920 2792 825.8
D 8 240 9189732 11125.56 2920 2792 825.8
D 2 249 2556750 3092.89 2920 2792 825.8

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