ASTROSAT CZTI

Data Quality Report

Orbit 20210420_A10_071T06_9000004324_level2

Creation date: 2021-04-21T11:05:05.289999
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/AS1A10_071T06_9000004324cztM0_level2_bc.evt modeM0/AS1A10_071T06_9000004324cztM0_level2_quad_clean.evt
Size (bytes)1,591,309,440477,996,480
Size1.5 GB 455.9 MB
Events in quadrant A7,774,7023,092,211
Events in quadrant B17,992,3603,071,548
Events in quadrant C7,767,2532,946,491
Events in quadrant D12,069,1162,759,592

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07720
B07720
C07720
D07720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0789860
B01151560
C0797160
D0981150

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0360
B0360
C0360
D0360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A379717742.038398%
B3797112793.368360%
C3797110992.894314%
D3797127997.371415%

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 41531 37974 0 0 0.00% 0.00%
B 41531 37973 8 8 0.02% 0.02%
C 41531 37974 1 1 0.00% 0.00%
D 41531 37964 200 200 0.48% 0.53%

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 8 192 71667 161.98 1984 1947 430.4
A 13 254 60582 136.23 1984 1947 430.4
A 3 1 24011 51.26 1984 1947 430.4
B 6 159 10252102 26780.68 1980 1926 382.7
B 0 229 86550 221.1 1980 1926 382.7
B 4 171 33741 83.12 1980 1926 382.7
C 3 233 297687 660.56 1893 1880 447.8
C 2 114 72890 158.57 1893 1880 447.8
C 10 20 52830 113.78 1893 1880 447.8
D 13 104 3428409 7951.46 1863 1808 430.9
D 8 195 736263 1704.31 1863 1808 430.9
D 2 250 186780 429.23 1863 1808 430.9

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