ASTROSAT CZTI

Data Quality Report

Orbit 35706

Creation date: 2022-05-06T16:41:51.669001
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_029T01_9000005116_35706cztM0_level2.evt modeM0/AS1A09_029T01_9000005116_35706cztM0_level2_quad_clean.evt
Size (bytes)416,151,36090,397,440
Size396.9 MB 86.2 MB
Events in quadrant A2,670,717601,820
Events in quadrant B3,466,100594,298
Events in quadrant C3,079,094591,579
Events in quadrant D3,014,571566,186

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0114943
B0138112
C0125852
D0126852

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5482180.328347%
B54822294.177308%
C5482831.514046%
D54821222.225465%

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 7155 5483 1 1 0.01% 0.02%
B 7155 5483 176 176 2.46% 3.21%
C 7155 5483 65 65 0.91% 1.19%
D 7155 5483 95 95 1.33% 1.73%

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 10 83 151681 1136.4 646 633 132.9
A 10 255 13064 93.52 646 633 132.9
A 3 137 6661 45.35 646 633 132.9
B 5 172 665528 5462.17 626 609 121.7
B 0 189 240880 1973.77 626 609 121.7
B 5 255 58103 472.3 626 609 121.7
C 0 10 365938 2528.54 618 619 144.5
C 15 214 232906 1607.77 618 619 144.5
C 9 187 55258 378.18 618 619 144.5
D 12 6 215514 1409.37 620 603 152.5
D 13 249 184630 1206.84 620 603 152.5
D 2 153 92612 603.39 620 603 152.5

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