ASTROSAT CZTI

Data Quality Report

Orbit 20171019_A04_180T01_9000001622_level2

Creation date: 2021-09-02T15:37:46.559066
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/AS1A04_180T01_9000001622cztM0_level2_bc.evt modeM0/AS1A04_180T01_9000001622cztM0_level2_quad_clean.evt
Size (bytes)1,851,019,200444,029,760
Size1.7 GB 423.5 MB
Events in quadrant A19,915,7992,690,314
Events in quadrant B12,520,9492,841,804
Events in quadrant C7,439,0422,816,123
Events in quadrant D13,730,5232,627,012

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220790
B0951340
C0750660
D0966550

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0660
B0660
C0660
D0660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07340
B07320
C07280
D07360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A35851388210.828150%
B3598420695.749778%
C360724491.244733%
D3603717874.958792%

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 44165 36164 468 468 1.06% 1.29%
B 44165 36283 61 61 0.14% 0.17%
C 44165 36387 11 11 0.02% 0.03%
D 44165 36363 414 414 0.94% 1.14%

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 5 7604050 19503.78 1813 1778 389.8
A 14 238 3762299 9647.69 1813 1778 389.8
A 8 15 821299 2102.5 1813 1778 389.8
B 4 239 2316693 6474.98 1901 1853 357.5
B 10 16 1509382 4216.8 1901 1853 357.5
B 15 204 466156 1298.73 1901 1853 357.5
C 9 54 82933 199.05 1852 1825 407.5
C 9 204 74715 178.89 1852 1825 407.5
C 14 234 18282 40.39 1852 1825 407.5
D 1 52 2274697 5463.1 1807 1741 416.1
D 11 129 1372985 3295.81 1807 1741 416.1
D 10 253 1109710 2663.03 1807 1741 416.1

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