ASTROSAT CZTI

Data Quality Report

Orbit 35850

Creation date: 2022-06-08T18:09:36.606363
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_35850cztM0_level2.evt modeM0/AS1A11_080T01_9000005146_35850cztM0_level2_quad_clean.evt
Size (bytes)431,193,60081,622,080
Size411.2 MB 77.8 MB
Events in quadrant A3,147,065526,480
Events in quadrant B3,219,761526,111
Events in quadrant C3,001,006518,837
Events in quadrant D3,299,579497,602

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128543
B0133172
C0124302
D0136052

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A575660.104239%
B57561031.789437%
C5756741.285615%
D57561071.858930%

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 7339 5757 0 0 0.00% 0.00%
B 7339 5757 78 78 1.06% 1.35%
C 7339 5757 58 58 0.79% 1.01%
D 7339 5757 97 97 1.32% 1.68%

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 15 169 363239 2662.4 673 661 136.2
A 10 83 169616 1240.63 673 661 136.2
A 13 6 10996 75.89 673 661 136.2
B 5 172 366886 2870.38 663 647 127.6
B 0 213 182584 1425.92 663 647 127.6
B 0 189 22867 174.15 663 647 127.6
C 15 214 244001 1619.18 647 656 150.3
C 0 10 231379 1535.2 647 656 150.3
C 13 61 4390 24.85 647 656 150.3
D 7 223 378223 2361.52 646 628 159.9
D 13 249 142162 885.17 646 628 159.9
D 8 195 106421 661.64 646 628 159.9

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