ASTROSAT CZTI

Data Quality Report

Orbit 51868

Creation date: 2025-05-01T02:06:24.016821
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_011T05_9000006466_51868cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51868cztM0_level2_quad_clean.evt
Size (bytes)708,520,32081,460,800
Size675.7 MB 77.7 MB
Events in quadrant A4,927,304584,796
Events in quadrant B7,025,050537,746
Events in quadrant C3,629,135571,936
Events in quadrant D10,149,915324,775

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191932
B0252991
C0154081
D0346291

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63981993.110347%
B6398134120.959675%
C63981332.078775%
D6399283244.256915%

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 7253 6399 137 137 1.89% 2.14%
B 7253 6399 1139 1139 15.70% 17.80%
C 7253 6399 86 86 1.19% 1.34%
D 7254 6400 2586 2586 35.65% 40.41%

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 1010536 6054.5 665 649 166.8
A 5 243 168710 1007.56 665 649 166.8
A 4 3 149522 892.53 665 649 166.8
B 4 170 3188465 24324.33 616 593 131.1
B 12 32 569560 4341.37 616 593 131.1
B 7 252 140133 1064.73 616 593 131.1
C 13 3 194119 1082.81 657 654 178.7
C 15 220 109650 610.04 657 654 178.7
C 15 219 100173 557.0 657 654 178.7
D 11 129 6420933 46000.91 495 476 139.6
D 6 42 645472 4621.23 495 476 139.6
D 8 176 528264 3781.46 495 476 139.6

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