ASTROSAT CZTI

Data Quality Report

Orbit 20210726_T04_030T01_9000004588_level2

Creation date: 2021-07-27T19:26:56.502906
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/AS1T04_030T01_9000004588cztM0_level2_bc.evt modeM0/AS1T04_030T01_9000004588cztM0_level2_quad_clean.evt
Size (bytes)2,079,106,560427,176,000
Size1.9 GB 407.4 MB
Events in quadrant A13,187,8242,563,257
Events in quadrant B17,466,3452,786,744
Events in quadrant C16,909,4492,564,413
Events in quadrant D13,063,6212,661,763

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01030720
B01059040
C01097690
D0896500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06980
B07060
C07030
D07020

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A34564514014.870964%
B3412011333.320633%
C34283499114.558236%
D3431810943.187831%

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 51536 35301 141 141 0.27% 0.40%
B 51537 34786 46 46 0.09% 0.13%
C 51537 35016 249 249 0.48% 0.71%
D 51537 35040 96 96 0.19% 0.27%

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 6255642 16916.71 1708 1679 369.7
A 15 174 325395 875.64 1708 1679 369.7
A 13 254 55179 144.72 1708 1679 369.7
B 6 159 9166983 26267.94 1841 1799 348.9
B 5 172 486531 1389.27 1841 1799 348.9
B 4 80 164232 465.54 1841 1799 348.9
C 3 233 8837735 22123.34 1691 1689 399.4
C 10 22 1224452 3061.5 1691 1689 399.4
C 0 10 154810 383.38 1691 1689 399.4
D 8 195 3394746 8187.96 1803 1745 414.4
D 12 218 797751 1920.91 1803 1745 414.4
D 2 250 580030 1395.51 1803 1745 414.4

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