ASTROSAT CZTI

Data Quality Report

Orbit 20210720_A10_094T27_9000004562_level2

Creation date: 2021-07-21T15:16:19.418367
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/AS1A10_094T27_9000004562cztM0_level2_bc.evt modeM0/AS1A10_094T27_9000004562cztM0_level2_quad_clean.evt
Size (bytes)316,120,320130,619,520
Size301.5 MB 124.6 MB
Events in quadrant A1,389,827894,506
Events in quadrant B3,336,736883,915
Events in quadrant C2,067,587832,622
Events in quadrant D2,296,483858,175

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142310
B0210860
C0180260
D0171090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6987600.858738%
B69871121.602977%
C69876148.787749%
D69871562.232718%

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 7576 6986 0 0 0.00% 0.00%
B 7576 6986 0 0 0.00% 0.00%
C 7576 6986 22 22 0.29% 0.31%
D 7577 6987 17 17 0.22% 0.24%

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 11606 139.67 358 351 80.6
A 12 16 2990 32.75 358 351 80.6
A 12 194 2618 28.13 358 351 80.6
B 6 159 1893486 26722.84 356 348 70.8
B 4 80 23645 328.85 356 348 70.8
B 0 190 19836 275.09 356 348 70.8
C 10 22 589430 7254.46 331 329 81.2
C 3 233 175833 2161.24 331 329 81.2
C 2 114 12748 152.93 331 329 81.2
D 8 195 571070 6327.18 351 340 90.2
D 12 218 229858 2544.46 351 340 90.2
D 2 250 101462 1121.05 351 340 90.2

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