ASTROSAT CZTI

Data Quality Report

Orbit 36271

Creation date: 2022-06-14T09:58:47.685299
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/AS1A10_071T36_9000005182_36271cztM0_level2.evt modeM0/AS1A10_071T36_9000005182_36271cztM0_level2_quad_clean.evt
Size (bytes)490,104,00081,558,720
Size467.4 MB 77.8 MB
Events in quadrant A2,770,945542,465
Events in quadrant B3,925,955534,734
Events in quadrant C3,245,962525,857
Events in quadrant D4,524,470479,137

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0118343
B0153412
C0130012
D0171532

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5531200.361598%
B55312624.736937%
C55311041.880311%
D55325019.056399%

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 7264 5532 10 10 0.14% 0.18%
B 7264 5532 176 176 2.42% 3.18%
C 7264 5532 76 76 1.05% 1.37%
D 7265 5533 525 525 7.23% 9.49%

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 185011 1415.71 650 638 130.2
A 9 143 56759 430.92 650 638 130.2
A 13 6 15959 117.64 650 638 130.2
B 5 172 518851 4227.89 633 616 122.6
B 4 171 327019 2662.88 633 616 122.6
B 5 236 263463 2144.37 633 616 122.6
C 0 10 351076 2383.32 628 633 147.0
C 15 214 229050 1553.44 628 633 147.0
C 0 207 205877 1395.84 628 633 147.0
D 7 223 1543252 10272.78 612 594 150.2
D 12 6 238566 1584.69 612 594 150.2
D 2 153 123749 820.11 612 594 150.2

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