ASTROSAT CZTI

Data Quality Report

Orbit 20180816_A04_037T01_9000002312_level2

Creation date: 2018-08-18T11:23:38.061988
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/AS1A04_037T01_9000002312cztM0_level2_bc.evt modeM0/AS1A04_037T01_9000002312cztM0_level2_quad_clean.evt
Size (bytes)2,309,895,360892,284,480
Size2.2 GB 850.9 MB
Events in quadrant A16,589,6465,611,311
Events in quadrant B16,961,5415,717,349
Events in quadrant C16,162,5315,482,400
Events in quadrant D15,485,7155,432,329

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01160
B01160
C01160
D01160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01507260
B01525660
C01513850
D01466980

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014180
B014180
C014180
D014180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6976911341.625364%
B697699821.407502%
C6976912721.823159%
D697697401.060643%

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 81255 69760 105 105 0.13% 0.15%
B 81255 69765 3 3 0.00% 0.00%
C 81255 69761 17 17 0.02% 0.02%
D 81255 69764 19 19 0.02% 0.03%

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 0 253 1506160 1896.26 3681 3606 792.4
A 4 2 757772 951.77 3681 3606 792.4
A 9 143 69200 82.78 3681 3606 792.4
B 4 251 1650375 2385.56 3703 3609 690.3
B 0 189 201877 287.22 3703 3609 690.3
B 0 214 144633 204.29 3703 3609 690.3
C 3 233 2171281 2605.67 3567 3549 831.9
C 7 247 111696 130.0 3567 3549 831.9
C 0 207 80159 92.09 3567 3549 831.9
D 2 234 318434 371.99 3677 3543 846.5
D 12 110 265851 309.87 3677 3543 846.5
D 10 70 254829 296.85 3677 3543 846.5

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