ASTROSAT CZTI

Data Quality Report

Orbit 35871

Creation date: 2022-06-08T20:20:16.030056
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_080T01_9000005146_35871cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35871cztM0_level2_quad_clean.evt
Size (bytes)446,639,04056,352,960
Size425.9 MB 53.7 MB
Events in quadrant A3,615,017346,380
Events in quadrant B2,910,209347,673
Events in quadrant C3,063,360339,496
Events in quadrant D3,597,900320,976

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0310
B0310
C0310
D0320

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0142813
B0114842
C0117862
D0143332

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5015591.176471%
B5015531.056830%
C50151222.432702%
D50151412.811565%

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 7169 5016 39 39 0.54% 0.78%
B 7169 5016 28 28 0.39% 0.56%
C 7169 5016 100 100 1.39% 1.99%
D 7169 5016 109 109 1.52% 2.17%

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 48 511538 3876.15 657 646 131.8
A 15 169 386304 2926.0 657 646 131.8
A 10 83 156713 1184.08 657 646 131.8
B 5 172 201785 1662.41 645 631 121.0
B 5 255 51184 417.79 645 631 121.0
B 15 85 35869 291.22 645 631 121.0
C 0 10 278721 1933.16 624 630 143.9
C 15 214 212064 1469.79 624 630 143.9
C 1 23 90561 625.16 624 630 143.9
D 8 195 409189 2666.25 631 615 153.2
D 2 250 251358 1636.28 631 615 153.2
D 7 223 242901 1581.1 631 615 153.2

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