ASTROSAT CZTI

Data Quality Report

Orbit 20200217_A08_009T01_9000003516_level2

Creation date: 2020-02-20T12:30:46.292051
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_009T01_9000003516cztM0_level2_bc.evt modeM0/AS1A08_009T01_9000003516cztM0_level2_quad_clean.evt
Size (bytes)2,796,736,3201,106,760,960
Size2.6 GB 1.0 GB
Events in quadrant A15,269,1207,187,363
Events in quadrant B18,923,1227,331,877
Events in quadrant C16,265,4537,110,432
Events in quadrant D29,168,2786,787,467

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01230
B01230
C01230
D01230

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015220
B015220
C015220
D015220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01537900
B01657650
C01575330
D01951300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A744857010.941129%
B7448515202.040679%
C7448511781.581526%
D7448520202.711955%

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 86820 74480 0 0 0.00% 0.00%
B 86820 74478 29 29 0.03% 0.04%
C 86820 74479 5 5 0.01% 0.01%
D 86820 74478 261 261 0.30% 0.35%

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 13 254 123093 138.61 3953 3882 860.0
A 0 226 25287 24.89 3953 3882 860.0
A 12 194 24433 23.9 3953 3882 860.0
B 3 64 1928349 2531.92 4015 3917 760.1
B 0 229 739019 967.15 4015 3917 760.1
B 0 189 459971 600.02 4015 3917 760.1
C 7 247 740666 802.48 3865 3846 918.2
C 10 9 528299 571.19 3865 3846 918.2
C 10 91 64463 66.02 3865 3846 918.2
D 8 195 10530750 11668.27 3863 3732 902.2
D 1 52 2881111 3189.32 3863 3732 902.2
D 13 174 432862 475.65 3863 3732 902.2

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