ASTROSAT CZTI

Data Quality Report

Orbit 54255

Creation date: 2025-10-09T16:32:03.153393
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_004T08_9000006514_54255cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54255cztM0_level2_quad_clean.evt
Size (bytes)616,098,24084,208,320
Size587.6 MB 80.3 MB
Events in quadrant A4,971,702565,104
Events in quadrant B3,102,478670,221
Events in quadrant C5,499,493517,303
Events in quadrant D8,753,317366,075

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0189962
B0134552
C0207002
D0302332

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A617174212.023983%
B6172941.523007%
C617274412.054439%
D6172215634.931951%

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 7291 6173 578 578 7.93% 9.36%
B 7292 6174 16 16 0.22% 0.26%
C 7292 6173 622 622 8.53% 10.08%
D 7291 6173 1965 1965 26.95% 31.83%

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 7 29 1391848 8856.45 634 620 157.1
A 12 17 705850 4489.44 634 620 157.1
A 12 194 92896 587.42 634 620 157.1
B 7 0 144835 1032.59 656 635 139.6
B 0 213 126649 902.36 656 635 139.6
B 8 234 47703 337.05 656 635 139.6
C 1 29 2565116 15475.33 601 596 165.7
C 15 198 153920 925.22 601 596 165.7
C 12 2 112732 676.67 601 596 165.7
D 8 176 5930031 40854.11 504 481 145.1
D 12 2 200304 1376.76 504 481 145.1
D 10 181 127859 877.62 504 481 145.1

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