ASTROSAT CZTI

Data Quality Report

Orbit 20211019_T04_064T01_9000004730_level2

Creation date: 2021-10-23T20:24:25.989650
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_064T01_9000004730cztM0_level2_bc.evt modeM0/AS1T04_064T01_9000004730cztM0_level2_quad_clean.evt
Size (bytes)13,432,092,4802,366,124,480
Size12.5 GB 2.2 GB
Events in quadrant A64,681,13514,847,238
Events in quadrant B63,564,01215,540,015
Events in quadrant C65,911,72115,358,407
Events in quadrant D199,954,15913,065,374

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07070
B07070
C07070
D07070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A038280
B038280
C038280
D038280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04979700
B04829830
C04675570
D09256810

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A187420116076.193042%
B18742061203.265393%
C18742077174.117490%
D1874203751320.015473%

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 260497 187384 1069 1069 0.41% 0.57%
B 260497 187417 359 359 0.14% 0.19%
C 260497 187419 3884 3884 1.49% 2.07%
D 260497 187415 13786 13786 5.29% 7.36%

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 15 237 13818882 6359.34 9925 9786 2171.5
A 12 16 5514048 2534.81 9925 9786 2171.5
A 14 238 2109374 966.9 9925 9786 2171.5
B 5 172 8487156 4252.24 10247 10049 1993.6
B 0 219 5731451 2869.94 10247 10049 1993.6
B 12 1 2108042 1052.38 10247 10049 1993.6
C 0 10 19437756 8636.4 9851 9791 2249.5
C 3 233 3112262 1379.16 9851 9791 2249.5
C 7 221 1384552 611.13 9851 9791 2249.5
D 8 195 99215161 42764.67 9237 9027 2319.8
D 2 250 13944879 6007.31 9237 9027 2319.8
D 10 203 7747443 3335.79 9237 9027 2319.8

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