ASTROSAT CZTI

Data Quality Report

Orbit 20180619_G08_081T01_9000002178_level2

Creation date: 2018-06-26T13:06:00.714530
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/AS1G08_081T01_9000002178cztM0_level2_bc.evt modeM0/AS1G08_081T01_9000002178cztM0_level2_quad_clean.evt
Size (bytes)2,434,553,280893,151,360
Size2.3 GB 851.8 MB
Events in quadrant A23,089,5315,700,336
Events in quadrant B15,235,3705,697,413
Events in quadrant C16,110,0875,571,424
Events in quadrant D14,843,1305,601,526

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013300
B013300
C013300
D013300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01649170
B01420470
C01403620
D01392180

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01110
B01110
C01110
D01110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6537218032.758062%
B6537210001.529707%
C653726010.919354%
D653726380.975953%

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 76413 65363 280 280 0.37% 0.43%
B 76413 65364 5 5 0.01% 0.01%
C 76413 65365 4 4 0.01% 0.01%
D 76413 65364 9 9 0.01% 0.01%

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 8 15 8925677 11678.84 3535 3473 764.0
A 12 189 424499 551.11 3535 3473 764.0
A 9 143 59587 73.45 3535 3473 764.0
B 0 230 281858 421.08 3530 3444 661.2
B 0 205 267242 398.97 3530 3444 661.2
B 0 229 181641 269.51 3530 3444 661.2
C 3 233 2544570 3420.84 3423 3381 742.9
C 6 96 79303 102.2 3423 3381 742.9
C 4 254 45590 56.82 3423 3381 742.9
D 12 16 785522 960.52 3490 3394 814.3
D 2 234 234275 283.54 3490 3394 814.3
D 13 172 115945 138.22 3490 3394 814.3

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