ASTROSAT CZTI

Data Quality Report

Orbit 55500

Creation date: 2025-12-31T13:56:10.411867
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_099T01_9000006536_55500cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55500cztM0_level2_quad_clean.evt
Size (bytes)683,513,28084,404,160
Size651.8 MB 80.5 MB
Events in quadrant A3,614,053629,951
Events in quadrant B5,420,746557,400
Events in quadrant C3,792,359602,079
Events in quadrant D11,944,358290,713

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01552648
B02127049
C016362186
D040402270

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68221321.934916%
B6821128018.765577%
C68141392.039918%
D6804364753.600823%

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 8603 6835 72 72 0.84% 1.05%
B 8607 6838 900 900 10.46% 13.16%
C 8604 6825 107 107 1.24% 1.57%
D 8602 6828 3016 3016 35.06% 44.17%

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 0 8 413125 2319.25 723 704 177.8
A 3 14 174074 974.95 723 704 177.8
A 7 14 66436 369.64 723 704 177.8
B 5 172 2884395 21698.38 622 598 132.9
B 4 67 47194 350.6 622 598 132.9
B 12 111 16321 118.3 622 598 132.9
C 9 38 522040 2725.45 697 688 191.3
C 13 3 259798 1354.54 697 688 191.3
C 15 147 69378 359.09 697 688 191.3
D 7 70 9447173 68270.59 482 459 138.4
D 11 129 415726 3001.1 482 459 138.4
D 6 239 68901 494.62 482 459 138.4

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