ASTROSAT CZTI

Data Quality Report

Orbit 35555

Creation date: 2022-04-26T11:51:40.179828
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_093T01_9000005090_35555cztM0_level2.evt modeM0/AS1A11_093T01_9000005090_35555cztM0_level2_quad_clean.evt
Size (bytes)493,133,76069,868,800
Size470.3 MB 66.6 MB
Events in quadrant A6,054,107374,418
Events in quadrant B2,950,443453,887
Events in quadrant C2,774,158467,442
Events in quadrant D2,786,279438,611

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0216752
B0124861
C0114801
D0120691

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5434148127.254325%
B5434961.766654%
C5434270.496872%
D5434561.030548%

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 7046 5435 720 720 10.22% 13.25%
B 7046 5435 57 57 0.81% 1.05%
C 7046 5435 23 23 0.33% 0.42%
D 7046 5435 23 23 0.33% 0.42%

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 3803053 33895.15 552 540 112.2
A 10 83 100477 890.83 552 540 112.2
A 13 6 11508 97.77 552 540 112.2
B 5 172 397093 3400.2 609 592 116.6
B 4 81 71220 605.67 609 592 116.6
B 3 112 29515 248.03 609 592 116.6
C 15 214 242716 1739.58 603 607 139.2
C 0 10 146265 1046.57 603 607 139.2
C 14 67 24422 171.11 603 607 139.2
D 8 195 154819 1063.98 597 581 145.0
D 2 250 100056 686.21 597 581 145.0
D 13 249 44663 304.09 597 581 145.0

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