ASTROSAT CZTI

Data Quality Report

Orbit 35784

Creation date: 2022-05-11T22:08:02.085062
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/AS1A09_121T01_9000005136_35784cztM0_level2.evt modeM0/AS1A09_121T01_9000005136_35784cztM0_level2_quad_clean.evt
Size (bytes)417,044,16069,408,000
Size397.7 MB 66.2 MB
Events in quadrant A2,891,092448,427
Events in quadrant B3,361,818448,347
Events in quadrant C2,864,748436,121
Events in quadrant D3,176,750421,991

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0116133
B0131912
C0113382
D0125472

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A49381052.126367%
B49381442.916160%
C49381012.045362%
D49381462.956663%

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 7091 4939 96 96 1.35% 1.94%
B 7091 4939 107 107 1.51% 2.17%
C 7091 4939 94 94 1.33% 1.90%
D 7091 4939 140 140 1.97% 2.83%

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 15 237 346034 2867.33 596 587 120.5
A 10 83 165131 1365.77 596 587 120.5
A 15 169 49574 406.61 596 587 120.5
B 5 172 331922 2979.18 593 579 111.2
B 5 255 191885 1720.08 593 579 111.2
B 0 213 118631 1061.43 593 579 111.2
C 0 10 253624 1891.82 578 583 133.8
C 15 214 212972 1587.89 578 583 133.8
C 1 23 73234 543.16 578 583 133.8
D 13 249 304446 2124.35 582 568 143.0
D 2 249 165009 1149.57 582 568 143.0
D 13 13 126717 881.88 582 568 143.0

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