ASTROSAT CZTI

Data Quality Report

Orbit 37138

Creation date: 2024-06-27T21:36:03.637337
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_079T01_9000005284_37138cztM0_level2.evt modeM0/AS1A11_079T01_9000005284_37138cztM0_level2_quad_clean.evt
Size (bytes)1,188,443,520172,837,440
Size1.1 GB 164.8 MB
Events in quadrant A7,842,6721,060,328
Events in quadrant B9,703,0421,032,191
Events in quadrant C8,535,0921,053,870
Events in quadrant D8,837,285991,187

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03260
B03260
C03260
D03260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0331955
B0395244
C0349984
D0375164

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15894290.182459%
B158947924.983012%
C158941540.968919%
D158943792.384548%

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 21358 15898 12 12 0.06% 0.08%
B 21358 15898 588 588 2.75% 3.70%
C 21358 15898 137 137 0.64% 0.86%
D 21358 15898 310 310 1.45% 1.95%

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 626665 1703.51 1816 1782 366.8
A 15 174 81874 218.34 1816 1782 366.8
A 7 16 59039 156.09 1816 1782 366.8
B 5 172 2050662 6018.5 1763 1713 340.4
B 5 184 315569 921.91 1763 1713 340.4
B 0 182 193922 564.59 1763 1713 340.4
C 15 214 724231 1766.61 1762 1781 408.9
C 14 254 397914 968.66 1762 1781 408.9
C 0 10 269152 653.8 1762 1781 408.9
D 2 249 1095710 2560.12 1753 1706 427.3
D 13 249 237526 551.85 1753 1706 427.3
D 12 235 187507 434.8 1753 1706 427.3

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