ASTROSAT CZTI

Data Quality Report

Orbit 20171122_A04_026T04_9000001714_level2

Creation date: 2017-11-23T09:52:13.675958
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_026T04_9000001714cztM0_level2_bc.evt modeM0/AS1A04_026T04_9000001714cztM0_level2_quad_clean.evt
Size (bytes)1,001,214,720398,856,960
Size954.8 MB 380.4 MB
Events in quadrant A6,328,4302,714,883
Events in quadrant B6,667,4782,708,402
Events in quadrant C4,174,8942,662,036
Events in quadrant D11,632,1362,465,510

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04520
B04520
C04520
D04520

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0577590
B0550990
C0452370
D0694560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A222286312.838762%
B2222810834.872233%
C222281610.724312%
D2222819918.957171%

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 23829 22230 5 5 0.02% 0.02%
B 23829 22229 4 4 0.02% 0.02%
C 23829 22229 3 3 0.01% 0.01%
D 23829 22227 980 980 4.11% 4.41%

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 5 1341464 5347.69 1085 1058 250.7
A 1 162 500270 1991.66 1085 1058 250.7
A 1 178 74631 293.53 1085 1058 250.7
B 4 239 1839722 8162.78 1080 1040 225.3
B 15 204 209259 924.38 1080 1040 225.3
B 0 219 197309 871.33 1080 1040 225.3
C 8 128 12552 48.24 1053 1035 238.7
C 12 4 9497 35.45 1053 1035 238.7
C 13 250 8268 30.3 1053 1035 238.7
D 1 52 3350524 13485.15 1031 992 248.4
D 10 253 1042344 4192.46 1031 992 248.4
D 13 137 852005 3426.16 1031 992 248.4

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