ASTROSAT CZTI

Data Quality Report

Orbit 20180528_A04_023T02_9000002124_level2

Creation date: 2018-05-29T10:01:00.069700
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/AS1A04_023T02_9000002124cztM0_level2_bc.evt modeM0/AS1A04_023T02_9000002124cztM0_level2_quad_clean.evt
Size (bytes)1,298,056,320428,898,240
Size1.2 GB 409.0 MB
Events in quadrant A7,426,3522,718,440
Events in quadrant B8,294,3692,719,376
Events in quadrant C10,809,7302,667,258
Events in quadrant D10,485,5612,574,971

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06820
B06820
C06820
D06820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0709770
B0750000
C0857060
D0819980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0420
B0420
C0420
D0420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A336378272.458602%
B3363711833.516960%
C336377392.196985%
D3363713464.001546%

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 37800 33636 11 11 0.03% 0.03%
B 37800 33634 74 74 0.20% 0.22%
C 37800 33639 22 22 0.06% 0.07%
D 37800 33638 153 153 0.40% 0.45%

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 12 189 287326 741.37 1766 1731 385.2
A 4 2 124271 318.1 1766 1731 385.2
A 8 15 104771 267.48 1766 1731 385.2
B 0 229 341470 1025.66 1772 1725 331.2
B 0 189 292404 877.54 1772 1725 331.2
B 8 3 273423 820.23 1772 1725 331.2
C 3 233 3910695 10262.86 1726 1699 380.9
C 0 207 129283 334.97 1726 1699 380.9
C 3 232 10313 22.62 1726 1699 380.9
D 13 122 1553869 3895.91 1716 1665 398.4
D 2 120 800526 2005.08 1716 1665 398.4
D 10 199 573893 1436.25 1716 1665 398.4

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