ASTROSAT CZTI

Data Quality Report

Orbit 20211125_T04_071T01_9000004782_level2

Creation date: 2021-11-27T19:35:40.698624
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_071T01_9000004782cztM0_level2_bc.evt modeM0/AS1T04_071T01_9000004782cztM0_level2_quad_clean.evt
Size (bytes)4,838,641,9201,046,612,160
Size4.5 GB 998.1 MB
Events in quadrant A21,676,1976,919,601
Events in quadrant B34,006,6386,417,656
Events in quadrant C38,780,9276,514,700
Events in quadrant D46,639,4366,352,223

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01824590
B02418240
C02422320
D02641500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016460
B016400
C016400
D016340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02790
B02810
C02770
D02760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8026414341.786604%
B80092964912.047395%
C7999641455.181509%
D8000629513.688473%

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 109939 80612 31 31 0.03% 0.04%
B 109939 80439 862 862 0.78% 1.07%
C 109939 80357 966 966 0.88% 1.20%
D 109939 80407 361 361 0.33% 0.45%

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 15 169 4370139 4655.03 4305 4252 937.9
A 0 254 303530 319.1 4305 4252 937.9
A 12 16 156509 162.34 4305 4252 937.9
B 5 172 8926515 10946.36 4110 4025 815.1
B 0 219 6570528 8055.97 4110 4025 815.1
B 5 200 1348437 1649.36 4110 4025 815.1
C 10 49 7876112 8554.38 4058 4044 920.2
C 1 23 7344692 7976.9 4058 4044 920.2
C 15 214 3454167 3749.16 4058 4044 920.2
D 8 195 20640510 18853.8 4113 4014 1094.6
D 2 250 2301556 2099.07 4113 4014 1094.6
D 12 6 1669200 1521.34 4113 4014 1094.6

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