ASTROSAT CZTI

Data Quality Report

Orbit 35521

Creation date: 2022-04-24T04:23:14.855512
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_097T09_9000005086_35521cztM0_level2.evt modeM0/AS1A11_097T09_9000005086_35521cztM0_level2_quad_clean.evt
Size (bytes)404,962,56068,106,240
Size386.2 MB 65.0 MB
Events in quadrant A2,710,986432,703
Events in quadrant B2,802,787441,144
Events in quadrant C3,550,892417,989
Events in quadrant D2,854,689414,412

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0111303
B0114822
C0138442
D0117632

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0290

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5081100.196812%
B5081741.456406%
C50811683.306436%
D5081741.456406%

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 7025 5082 8 8 0.11% 0.16%
B 7025 5082 36 36 0.51% 0.71%
C 7025 5082 130 130 1.85% 2.56%
D 7025 5082 68 68 0.97% 1.34%

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 129681 1035.43 619 608 124.7
A 15 169 127093 1014.67 619 608 124.7
A 9 143 24641 192.79 619 608 124.7
B 5 172 206588 1767.18 616 603 116.6
B 5 200 153766 1314.01 616 603 116.6
B 12 111 14194 116.6 616 603 116.6
C 0 10 483078 3470.16 598 603 139.0
C 0 239 417362 2997.5 598 603 139.0
C 15 214 210496 1509.64 598 603 139.0
D 13 249 291657 1999.85 597 582 145.5
D 8 195 106770 729.57 597 582 145.5
D 10 199 73525 501.16 597 582 145.5

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