ASTROSAT CZTI

Data Quality Report

Orbit 20210213_T03_275T01_9000004180_level2

Creation date: 2021-02-17T11:27:35.910761
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_275T01_9000004180cztM0_level2_bc.evt modeM0/AS1T03_275T01_9000004180cztM0_level2_quad_clean.evt
Size (bytes)2,725,283,520851,829,120
Size2.5 GB 812.4 MB
Events in quadrant A13,694,1925,579,089
Events in quadrant B15,509,9635,639,779
Events in quadrant C15,720,8315,310,256
Events in quadrant D33,449,6635,078,108

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0900
B0900
C0900
D0900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01282740
B01349620
C01369770
D01951480

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012480
B012480
C012480
D012480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A611445400.883161%
B6114410641.740154%
C6114410551.725435%
D6114437646.155960%

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 70298 61138 0 0 0.00% 0.00%
B 70298 61138 29 29 0.04% 0.05%
C 70298 61137 3 3 0.00% 0.00%
D 70298 61138 982 982 1.40% 1.61%

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 13 254 109799 139.89 3505 3459 760.2
A 13 6 67924 84.8 3505 3459 760.2
A 6 16 62308 77.41 3505 3459 760.2
B 10 245 640273 965.38 3515 3450 659.7
B 5 255 443196 666.63 3515 3450 659.7
B 5 172 345954 519.21 3515 3450 659.7
C 3 233 2648350 3370.63 3314 3317 784.7
C 2 114 120206 148.95 3314 3317 784.7
C 10 22 101911 125.64 3314 3317 784.7
D 8 195 11307762 14843.09 3317 3224 761.6
D 1 52 7584033 9953.76 3317 3224 761.6
D 12 233 822480 1075.7 3317 3224 761.6

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