ASTROSAT CZTI

Data Quality Report

Orbit 51741

Creation date: 2025-04-22T11:30:07.054380
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_51741cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51741cztM0_level2_quad_clean.evt
Size (bytes)502,444,80082,008,000
Size479.2 MB 78.2 MB
Events in quadrant A3,894,265552,150
Events in quadrant B3,995,055590,883
Events in quadrant C4,099,803510,618
Events in quadrant D6,168,092431,044

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154271
B0157161
C0159581
D0222101

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A56911632.864171%
B56912564.498331%
C56924568.011244%
D5692105718.569923%

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 6820 5690 119 119 1.74% 2.09%
B 6820 5690 158 158 2.32% 2.78%
C 6821 5691 388 388 5.69% 6.82%
D 6821 5691 1018 1018 14.92% 17.89%

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 4 175 535652 3476.51 624 607 153.9
A 11 3 255187 1654.16 624 607 153.9
A 4 3 143653 929.46 624 607 153.9
B 10 44 444310 3351.63 614 592 132.4
B 4 206 222310 1674.75 614 592 132.4
B 10 247 156041 1174.18 614 592 132.4
C 9 38 751850 4506.86 601 597 166.7
C 13 3 283924 1699.71 601 597 166.7
C 15 144 138387 826.62 601 597 166.7
D 11 129 3338436 21031.47 565 546 158.7
D 8 176 350459 2204.74 565 546 158.7
D 2 120 76396 477.92 565 546 158.7

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