ASTROSAT CZTI

Data Quality Report

Orbit 20200725_T03_218T01_9000003770_level2

Creation date: 2021-01-09T19:55:34.026821
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/AS1T03_218T01_9000003770cztM0_level2_bc.evt modeM0/AS1T03_218T01_9000003770cztM0_level2_quad_clean.evt
Size (bytes)629,539,200251,879,040
Size600.4 MB 240.2 MB
Events in quadrant A4,590,2611,655,698
Events in quadrant B4,251,2681,669,497
Events in quadrant C3,964,9251,563,451
Events in quadrant D5,092,9151,566,502

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03440
B03440
C03440
D03440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0382670
B0370230
C0365070
D0389730

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0400
B0400
C0400
D0400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A170382251.320578%
B170382201.291231%
C170372551.496742%
D170381350.792347%

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 20888 17036 11 11 0.05% 0.06%
B 20888 17035 0 0 0.00% 0.00%
C 20888 17035 0 0 0.00% 0.00%
D 20888 17035 6 6 0.03% 0.04%

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 0 13 453399 1997.9 1073 1062 226.4
A 13 254 24609 104.0 1073 1062 226.4
A 11 29 7117 26.74 1073 1062 226.4
B 0 190 36968 183.82 1075 1059 195.4
B 0 245 36043 179.08 1075 1059 195.4
B 4 201 19539 94.6 1075 1059 195.4
C 5 4 56985 239.48 1006 1007 233.7
C 3 233 28383 117.12 1006 1007 233.7
C 2 16 16177 64.9 1006 1007 233.7
D 1 52 574251 2434.66 1037 1016 235.4
D 7 80 400744 1697.74 1037 1016 235.4
D 2 234 63823 266.76 1037 1016 235.4

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