ASTROSAT CZTI

Data Quality Report

Orbit 20190925_A06_002T02_9000003204_level2

Creation date: 2019-09-28T11:22:29.764040
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/AS1A06_002T02_9000003204cztM0_level2_bc.evt modeM0/AS1A06_002T02_9000003204cztM0_level2_quad_clean.evt
Size (bytes)2,545,692,480936,201,600
Size2.4 GB 892.8 MB
Events in quadrant A18,877,8595,861,642
Events in quadrant B16,361,4676,097,185
Events in quadrant C13,936,5255,900,574
Events in quadrant D23,150,1835,698,978

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01683820
B01504620
C01445680
D01764770

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014260
B014260
C014260
D014260

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01130
B01130
C01130
D01130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6997531394.485888%
B699759471.353340%
C699759681.383351%
D6997526273.754198%

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 81300 69974 6 6 0.01% 0.01%
B 81300 69977 61 61 0.08% 0.09%
C 81300 69976 0 0 0.00% 0.00%
D 81300 69972 423 423 0.52% 0.60%

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 15 236 4834284 6158.97 3640 3577 784.3
A 13 254 86333 105.51 3640 3577 784.3
A 0 226 23400 25.27 3640 3577 784.3
B 3 64 724474 1027.54 3754 3663 701.5
B 0 189 354619 500.3 3754 3663 701.5
B 0 230 271270 381.48 3754 3663 701.5
C 3 233 24615 24.58 3607 3587 855.5
C 13 61 21008 20.36 3607 3587 855.5
C 8 128 14810 13.12 3607 3587 855.5
D 1 52 5322997 6371.71 3618 3491 834.9
D 2 136 1382766 1652.1 3618 3491 834.9
D 14 35 613274 730.4 3618 3491 834.9

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