ASTROSAT CZTI

Data Quality Report

Orbit 20200331_A08_008T01_9000003596_level2

Creation date: 2020-06-07T15:11:01.508166
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/AS1A08_008T01_9000003596cztM0_level2_bc.evt modeM0/AS1A08_008T01_9000003596cztM0_level2_quad_clean.evt
Size (bytes)6,497,648,6401,937,534,400
Size6.1 GB 1.8 GB
Events in quadrant A27,885,16813,097,341
Events in quadrant B27,757,34413,354,575
Events in quadrant C89,672,21711,690,554
Events in quadrant D43,237,30812,241,849

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013160
B013160
C013160
D013160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02692810
B02688170
C04620230
D03202700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02050
B02080
C02080
D02080

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12955715471.194069%
B12955716871.302130%
C1295572287617.657093%
D12955645913.543641%

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 158298 129560 89 89 0.06% 0.07%
B 158298 129560 4 4 0.00% 0.00%
C 158298 129562 11350 11350 7.17% 8.76%
D 158298 129559 933 933 0.59% 0.72%

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 6 10 1245056 825.56 6899 6782 1499.9
A 13 254 198355 127.72 6899 6782 1499.9
A 0 226 43940 24.77 6899 6782 1499.9
B 4 200 266112 197.2 6984 6823 1314.8
B 15 33 225908 166.63 6984 6823 1314.8
B 0 190 188220 137.96 6984 6823 1314.8
C 7 247 63850178 43369.89 6220 6190 1472.1
C 2 16 1683522 1139.43 6220 6190 1472.1
C 7 226 147523 96.01 6220 6190 1472.1
D 1 52 9821057 6326.33 6680 6452 1551.4
D 9 35 2266879 1457.03 6680 6452 1551.4
D 12 233 2217935 1425.49 6680 6452 1551.4

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