ASTROSAT CZTI

Data Quality Report

Orbit 36490

Creation date: 2022-06-28T14:25:31.402132
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_049T04_9000005210_36490cztM0_level2.evt modeM0/AS1A11_049T04_9000005210_36490cztM0_level2_quad_clean.evt
Size (bytes)425,278,08072,901,440
Size405.6 MB 69.5 MB
Events in quadrant A2,840,331473,115
Events in quadrant B3,831,102445,785
Events in quadrant C2,853,303465,874
Events in quadrant D2,991,937448,598

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0310

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0116313
B0147472
C0116142
D0123122

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5335260.487348%
B53353797.104030%
C5335571.068416%
D5335310.581068%

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 7157 5336 18 18 0.25% 0.34%
B 7157 5336 292 292 4.08% 5.47%
C 7157 5336 24 24 0.34% 0.45%
D 7157 5336 28 28 0.39% 0.52%

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 195161 1505.09 649 638 129.2
A 15 223 84966 652.48 649 638 129.2
A 15 233 31387 237.92 649 638 129.2
B 5 172 784013 6620.95 620 605 118.3
B 5 255 494047 4170.31 620 605 118.3
B 5 63 51435 429.59 620 605 118.3
C 15 214 231234 1606.99 624 630 143.5
C 0 10 181859 1262.91 624 630 143.5
C 13 61 4138 24.45 624 630 143.5
D 13 249 139794 910.8 629 611 152.8
D 12 227 130988 853.18 629 611 152.8
D 2 249 95608 621.65 629 611 152.8

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