ASTROSAT CZTI

Data Quality Report

Orbit 20210108_A10_110T01_9000004104_level2

Creation date: 2021-01-11T13:07:59.548290
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/AS1A10_110T01_9000004104cztM0_level2_bc.evt modeM0/AS1A10_110T01_9000004104cztM0_level2_quad_clean.evt
Size (bytes)2,562,592,320806,601,600
Size2.4 GB 769.2 MB
Events in quadrant A14,813,5095,113,274
Events in quadrant B15,310,7595,175,406
Events in quadrant C14,192,2464,972,174
Events in quadrant D28,897,1184,745,881

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013120
B013120
C013120
D013120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01393420
B01419750
C01385300
D01927080

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A645099041.401355%
B6450911471.778046%
C6450911431.771846%
D6450949517.674898%

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 74949 64500 7 7 0.01% 0.01%
B 74949 64498 3 3 0.00% 0.00%
C 74949 64503 5 5 0.01% 0.01%
D 74949 64500 712 712 0.95% 1.10%

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 15 174 664636 856.0 3609 3549 772.3
A 14 238 92386 115.03 3609 3549 772.3
A 13 254 92242 114.84 3609 3549 772.3
B 4 171 846258 1247.52 3619 3537 675.5
B 15 33 220578 321.3 3619 3537 675.5
B 0 230 104152 148.94 3619 3537 675.5
C 7 247 583105 719.45 3477 3475 805.7
C 0 207 65708 77.25 3477 3475 805.7
C 10 22 65269 76.7 3477 3475 805.7
D 1 52 9688770 12611.62 3434 3331 768.0
D 8 195 4318872 5619.36 3434 3331 768.0
D 2 250 1290459 1676.0 3434 3331 768.0

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