ASTROSAT CZTI

Data Quality Report

Orbit 51791

Creation date: 2025-04-25T21:15:54.948342
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_51791cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51791cztM0_level2_quad_clean.evt
Size (bytes)948,237,120105,554,880
Size904.3 MB 100.7 MB
Events in quadrant A6,748,331728,853
Events in quadrant B9,367,705715,897
Events in quadrant C6,870,095689,763
Events in quadrant D11,478,265488,376

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0256210
B0336060
C0260481
D0398420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82375276.397960%
B8238147617.916970%
C82377378.947432%
D8237282734.320748%

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 8237 8237 344 344 4.18% 4.18%
B 8238 8238 1073 1073 13.03% 13.03%
C 8237 8237 597 597 7.25% 7.25%
D 8237 8237 2472 2472 30.01% 30.01%

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 996994 4522.28 896 872 220.3
A 12 3 865318 3924.48 896 872 220.3
A 11 3 236453 1069.51 896 872 220.3
B 10 128 3715037 20107.75 854 823 184.7
B 10 44 551339 2980.34 854 823 184.7
B 5 185 277857 1499.79 854 823 184.7
C 3 233 646965 2831.15 838 830 228.2
C 15 192 389109 1701.31 838 830 228.2
C 0 209 382167 1670.89 838 830 228.2
D 11 129 6797863 32861.17 746 719 206.8
D 3 12 472907 2282.82 746 719 206.8
D 7 60 324863 1567.09 746 719 206.8

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