ASTROSAT CZTI

Data Quality Report

Orbit 20210418_A10_071T09_9000004320_level2

Creation date: 2021-04-20T11:08:18.544564
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/AS1A10_071T09_9000004320cztM0_level2_bc.evt modeM0/AS1A10_071T09_9000004320cztM0_level2_quad_clean.evt
Size (bytes)2,369,445,120731,854,080
Size2.2 GB 698.0 MB
Events in quadrant A12,667,2934,687,360
Events in quadrant B28,168,7614,667,717
Events in quadrant C12,695,7734,433,775
Events in quadrant D14,302,9204,423,856

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011800
B011800
C011800
D011800

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01204060
B01750130
C01229450
D01226840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A576346621.148628%
B5763411642.019641%
C5763413332.312871%
D576344270.740882%

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 68279 57635 1 1 0.00% 0.00%
B 68279 57635 17 17 0.02% 0.03%
C 68279 57633 13 13 0.02% 0.02%
D 68279 57634 17 17 0.02% 0.03%

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 8 192 133113 188.83 3237 3185 688.1
A 13 254 101048 142.22 3237 3185 688.1
A 12 96 49192 66.86 3237 3185 688.1
B 6 159 15317239 25097.51 3243 3168 610.2
B 5 255 248552 402.15 3243 3168 610.2
B 0 190 67227 104.98 3243 3168 610.2
C 3 233 495320 690.16 3060 3054 713.3
C 15 208 187934 259.2 3060 3054 713.3
C 2 114 106585 145.15 3060 3054 713.3
D 8 195 1545799 2194.09 3117 3038 703.1
D 2 250 370390 522.44 3117 3038 703.1
D 2 234 211639 296.67 3117 3038 703.1

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