ASTROSAT CZTI

Data Quality Report

Orbit 35246

Creation date: 2022-04-05T14:04:27.447817
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/AS1C07_004T01_9000005052_35246cztM0_level2.evt modeM0/AS1C07_004T01_9000005052_35246cztM0_level2_quad_clean.evt
Size (bytes)645,056,64071,841,600
Size615.2 MB 68.5 MB
Events in quadrant A3,242,540476,506
Events in quadrant B6,356,402423,442
Events in quadrant C3,036,335500,923
Events in quadrant D6,554,644415,013

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0127363
B0224962
C0121122
D0230872

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A51211873.651631%
B5121135026.362039%
C51211082.108963%
D512186716.930287%

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 7094 5122 157 157 2.21% 3.07%
B 7094 5122 957 957 13.49% 18.68%
C 7094 5122 71 71 1.00% 1.39%
D 7094 5121 825 825 11.63% 16.11%

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 7 3 577149 4392.37 660 650 131.3
A 10 83 96698 731.79 660 650 131.3
A 13 6 10385 74.17 660 650 131.3
B 5 236 2961249 26748.5 590 579 110.7
B 5 172 1010733 9126.35 590 579 110.7
B 0 245 24099 212.49 590 579 110.7
C 0 10 294509 1991.21 645 651 147.6
C 15 214 217468 1469.17 645 651 147.6
C 14 67 4931 29.0 645 651 147.6
D 7 80 1735849 11830.54 607 592 146.7
D 8 195 1487325 10136.17 607 592 146.7
D 13 249 215707 1466.6 607 592 146.7

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