ASTROSAT CZTI

Data Quality Report

Orbit 35531

Creation date: 2022-04-25T11:40:12.613280
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/AS1A11_097T09_9000005086_35531cztM0_level2.evt modeM0/AS1A11_097T09_9000005086_35531cztM0_level2_quad_clean.evt
Size (bytes)975,556,800206,861,760
Size930.4 MB 197.3 MB
Events in quadrant A6,480,4111,348,510
Events in quadrant B6,456,3261,361,052
Events in quadrant C7,613,0191,336,039
Events in quadrant D8,070,3841,275,841

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02780
B02780
C02780
D02780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280514
B0282213
C0306493
D0328433

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0430
C0430
D0430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A13677230.168166%
B13677490.358266%
C136771310.957812%
D136773102.266579%

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 17916 13680 3 3 0.02% 0.02%
B 17916 13680 22 22 0.12% 0.16%
C 17916 13680 86 86 0.48% 0.63%
D 17916 13680 239 239 1.33% 1.75%

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 10 83 258901 804.92 1581 1548 319.7
A 15 169 77577 237.8 1581 1548 319.7
A 9 143 30520 90.62 1581 1548 319.7
B 5 172 126110 412.88 1562 1521 301.8
B 5 236 90695 295.51 1562 1521 301.8
B 3 112 47686 152.99 1562 1521 301.8
C 15 214 559835 1557.02 1536 1546 358.6
C 0 10 548799 1526.24 1536 1546 358.6
C 0 207 326009 904.9 1536 1546 358.6
D 12 235 1401730 3759.86 1531 1492 372.4
D 8 195 267198 713.46 1531 1492 372.4
D 2 250 244746 653.18 1531 1492 372.4

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