ASTROSAT CZTI

Data Quality Report

Orbit 20170921_A03_084T01_9000001544_level2

Creation date: 2017-10-18T15:24:12.430487
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/AS1A03_084T01_9000001544cztM0_level2.evt modeM0/AS1A03_084T01_9000001544cztM0_level2_quad_clean.evt
Size (bytes)1,828,111,680282,925,440
Size1.7 GB 269.8 MB
Events in quadrant A10,870,6681,815,851
Events in quadrant B16,738,2231,776,132
Events in quadrant C10,256,1691,777,127
Events in quadrant D15,972,7501,641,531

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04620
B04620
C04620
D04620

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0476300
B0646760
C0465020
D0621460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A226412651.170443%
B2264214976.611607%
C226421440.635986%
D226428933.943998%

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 27962 22647 14 14 0.05% 0.06%
B 27963 22646 940 940 3.36% 4.15%
C 27963 22648 1 1 0.00% 0.00%
D 27963 22648 670 670 2.40% 2.96%

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 13 251 105107 186.19 2728 2668 550.2
A 15 174 86089 151.63 2728 2668 550.2
A 1 162 68278 119.25 2728 2668 550.2
B 4 239 3947315 7719.68 2690 2631 511.0
B 4 81 1506028 2942.12 2690 2631 511.0
B 0 85 194119 374.74 2690 2631 511.0
C 14 234 24912 37.04 2618 2630 601.6
C 13 61 19789 28.52 2618 2630 601.6
C 15 48 9142 10.82 2618 2630 601.6
D 10 199 1901082 3058.2 2580 2505 620.8
D 2 16 1284709 2065.36 2580 2505 620.8
D 8 195 976969 1569.65 2580 2505 620.8

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