ASTROSAT CZTI

Data Quality Report

Orbit 20200909_A09_038T09_9000003860_level2

Creation date: 2021-01-08T12:09:43.798779
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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_038T09_9000003860cztM0_level2_bc.evt modeM0/AS1A09_038T09_9000003860cztM0_level2_quad_clean.evt
Size (bytes)1,298,134,080197,386,560
Size1.2 GB 188.2 MB
Events in quadrant A6,428,4961,423,798
Events in quadrant B19,332,704941,783
Events in quadrant C2,777,5601,427,774
Events in quadrant D9,850,2441,244,648

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0404730
B0876930
C0278890
D0561660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02780
B02780
C02780
D02780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A135444073.005021%
B13544876064.678086%
C135441451.070585%
D13544264019.492026%

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 15964 13545 2 2 0.01% 0.01%
B 15964 13545 3660 3660 22.93% 27.02%
C 15964 13544 2 2 0.01% 0.01%
D 15964 13541 350 350 2.19% 2.58%

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 0 13 3730296 24661.1 688 675 151.2
A 13 254 22664 145.4 688 675 151.2
A 6 16 17882 113.78 688 675 151.2
B 0 189 17466402 188097.89 473 464 92.9
B 3 112 24780 261.87 473 464 92.9
B 10 246 13907 144.77 473 464 92.9
C 2 16 90621 544.75 680 676 165.1
C 15 208 65644 393.48 680 676 165.1
C 3 233 8498 47.37 680 676 165.1
D 7 80 6343700 43219.41 624 607 146.8
D 1 52 711724 4845.28 624 607 146.8
D 2 250 211958 1440.06 624 607 146.8

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