ASTROSAT CZTI

Data Quality Report

Orbit 35491

Creation date: 2022-04-22T03:38:32.222709
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/AS1A11_097T22_9000005082_35491cztM0_level2.evt modeM0/AS1A11_097T22_9000005082_35491cztM0_level2_quad_clean.evt
Size (bytes)547,747,20091,892,160
Size522.4 MB 87.6 MB
Events in quadrant A2,722,282600,662
Events in quadrant B6,551,234579,444
Events in quadrant C3,545,746628,761
Events in quadrant D3,396,999589,074

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0116713
B0233042
C0140502
D0139102

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5502130.236278%
B5502111420.247183%
C55021512.744457%
D55021572.853508%

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 9057 5504 2 2 0.02% 0.04%
B 9057 5504 741 741 8.18% 13.46%
C 9057 5504 113 113 1.25% 2.05%
D 9057 5504 135 135 1.49% 2.45%

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 10 83 132195 1016.31 644 632 129.5
A 15 169 69982 535.72 644 632 129.5
A 9 143 26809 202.22 644 632 129.5
B 4 171 3553466 30907.34 613 599 115.0
B 5 172 236530 2052.43 613 599 115.0
B 5 236 156425 1355.57 613 599 115.0
C 0 207 377690 2560.08 641 646 147.3
C 0 10 272525 1846.02 641 646 147.3
C 15 214 225612 1527.49 641 646 147.3
D 13 249 364908 2406.55 632 616 151.4
D 7 80 237638 1565.79 632 616 151.4
D 8 195 115600 759.59 632 616 151.4

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