ASTROSAT CZTI

Data Quality Report

Orbit 20200430_A07_045T01_9000003628_level2

Creation date: 2020-05-02T15:08:09.052997
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/AS1A07_045T01_9000003628cztM0_level2_bc.evt modeM0/AS1A07_045T01_9000003628cztM0_level2_quad_clean.evt
Size (bytes)1,885,394,880669,312,000
Size1.8 GB 638.3 MB
Events in quadrant A11,594,3604,282,535
Events in quadrant B14,268,2314,317,713
Events in quadrant C12,788,6624,051,194
Events in quadrant D14,839,0363,990,018

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01030
B01030
C01030
D01030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01104590
B01213260
C01176050
D01193630

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010760
B010760
C010760
D010760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A529415621.061559%
B5294113602.568897%
C5294111112.098563%
D529404880.921798%

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 63086 52944 0 0 0.00% 0.00%
B 63086 52942 105 105 0.17% 0.20%
C 63086 52941 2 2 0.00% 0.00%
D 63086 52941 45 45 0.07% 0.09%

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 71382 106.86 3002 2954 640.3
A 0 226 19068 25.17 3002 2954 640.3
A 12 194 18137 23.71 3002 2954 640.3
B 3 64 2366942 4242.92 3010 2940 557.2
B 0 189 155327 273.5 3010 2940 557.2
B 15 32 78329 135.31 3010 2940 557.2
C 7 247 1500289 2280.67 2835 2822 656.6
C 2 16 313528 473.21 2835 2822 656.6
C 5 112 72377 105.93 2835 2822 656.6
D 8 195 3163631 4755.49 2899 2797 664.7
D 1 52 327439 488.43 2899 2797 664.7
D 2 234 198852 294.97 2899 2797 664.7

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