ASTROSAT CZTI

Data Quality Report

Orbit 20181223_T03_068T01_9000002594_level2

Creation date: 2018-12-26T10:02:22.702984
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_068T01_9000002594cztM0_level2_bc.evt modeM0/AS1T03_068T01_9000002594cztM0_level2_quad_clean.evt
Size (bytes)2,457,869,7601,150,891,200
Size2.3 GB 1.1 GB
Events in quadrant A16,850,2777,573,197
Events in quadrant B16,714,8267,606,045
Events in quadrant C16,143,2867,207,940
Events in quadrant D19,394,5907,112,885

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01350
B01350
C01350
D01350

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01639390
B01626880
C01614740
D01739430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015900
B015900
C015900
D015900

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A782168271.057328%
B782168891.136596%
C782169881.263169%
D7821617692.261686%

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 90605 78216 8 8 0.01% 0.01%
B 90605 78212 5 5 0.01% 0.01%
C 90606 78216 1 1 0.00% 0.00%
D 90605 78213 164 164 0.18% 0.21%

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 15 174 739381 814.37 4160 4084 902.9
A 13 210 98509 104.58 4160 4084 902.9
A 4 2 39052 38.73 4160 4084 902.9
B 7 220 154792 193.37 4159 4059 779.5
B 0 219 115225 142.61 4159 4059 779.5
B 0 189 96186 118.18 4159 4059 779.5
C 5 218 434707 467.41 3953 3936 921.6
C 3 233 396387 425.83 3953 3936 921.6
C 5 219 35901 34.68 3953 3936 921.6
D 13 189 1109401 1168.48 4065 3924 946.1
D 10 70 1014262 1067.91 4065 3924 946.1
D 13 232 480348 503.57 4065 3924 946.1

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