ASTROSAT CZTI

Data Quality Report

Orbit 20200127_A07_138T01_9000003466_level2

Creation date: 2020-01-29T12:12:24.364050
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A07_138T01_9000003466cztM0_level2_bc.evt modeM0/AS1A07_138T01_9000003466cztM0_level2_quad_clean.evt
Size (bytes)1,039,757,760365,166,720
Size991.6 MB 348.3 MB
Events in quadrant A6,467,7912,310,144
Events in quadrant B7,170,2582,332,313
Events in quadrant C6,639,2832,223,854
Events in quadrant D9,206,4992,176,050

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05940
B05940
C05940
D05940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0612930
B0643050
C0625450
D0700480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0540
B0540
C0540
D0540

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A293672160.735519%
B293673601.225866%
C293674141.409746%
D293676632.257636%

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 34627 29365 0 0 0.00% 0.00%
B 34627 29362 12 12 0.03% 0.04%
C 34627 29363 7 7 0.02% 0.02%
D 34627 29366 141 141 0.41% 0.48%

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 15 174 59126 161.47 1659 1632 356.1
A 13 254 42948 116.04 1659 1632 356.1
A 0 226 10815 25.79 1659 1632 356.1
B 0 189 286082 923.57 1654 1616 308.0
B 0 190 273919 884.08 1654 1616 308.0
B 0 229 86885 276.84 1654 1616 308.0
C 10 9 491359 1343.75 1572 1567 364.5
C 7 247 57213 152.67 1572 1567 364.5
C 0 207 31178 81.24 1572 1567 364.5
D 1 52 2520941 6898.31 1611 1560 365.2
D 13 104 121328 327.94 1611 1560 365.2
D 2 234 121325 327.93 1611 1560 365.2

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