ASTROSAT CZTI

Data Quality Report

Orbit 35575

Creation date: 2022-04-27T21:18:54.455952
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_065T21_9000005094_35575cztM0_level2.evt modeM0/AS1A11_065T21_9000005094_35575cztM0_level2_quad_clean.evt
Size (bytes)467,055,36079,583,040
Size445.4 MB 75.9 MB
Events in quadrant A2,669,555524,403
Events in quadrant B4,339,044505,369
Events in quadrant C2,851,806523,828
Events in quadrant D3,920,983481,255

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0115172
B0164911
C0117111
D0151241

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5348781.458489%
B534861011.406133%
C5348430.804039%
D53483496.525804%

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 6961 5349 60 60 0.86% 1.12%
B 6961 5349 392 392 5.63% 7.33%
C 6961 5349 21 21 0.30% 0.39%
D 6961 5349 310 310 4.45% 5.80%

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 15 169 176287 1450.64 601 587 121.1
A 10 83 110211 905.09 601 587 121.1
A 7 3 29377 237.7 601 587 121.1
B 5 172 1672824 15072.7 575 558 110.9
B 5 200 196555 1766.59 575 558 110.9
B 4 81 75341 674.04 575 558 110.9
C 15 214 219210 1584.67 594 596 138.0
C 0 10 154943 1118.82 594 596 138.0
C 9 187 122728 885.3 594 596 138.0
D 7 80 414525 2909.11 578 562 142.3
D 8 195 267954 1879.09 578 562 142.3
D 10 118 241049 1690.01 578 562 142.3

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