ASTROSAT CZTI

Data Quality Report

Orbit 20180724_T02_073T01_9000002252_level2

Creation date: 2018-07-25T16:50:49.645505
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/AS1T02_073T01_9000002252cztM0_level2_bc.evt modeM0/AS1T02_073T01_9000002252cztM0_level2_quad_clean.evt
Size (bytes)1,801,105,920738,241,920
Size1.7 GB 704.0 MB
Events in quadrant A11,673,3414,728,133
Events in quadrant B13,614,4744,787,065
Events in quadrant C13,860,8784,702,058
Events in quadrant D11,796,6854,521,866

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01112300
B01187030
C01156360
D01122770

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010760
B010760
C010760
D010760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A528044590.869252%
B5280412442.355882%
C528046261.185516%
D528045190.982880%

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 63396 52802 2 2 0.00% 0.00%
B 63396 52804 153 153 0.24% 0.29%
C 63396 52801 28 28 0.04% 0.05%
D 63396 52803 28 28 0.04% 0.05%

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 12 189 831351 1365.78 2805 2750 606.7
A 9 143 44217 68.35 2805 2750 606.7
A 15 69 19034 26.84 2805 2750 606.7
B 10 16 1729707 3210.78 2838 2764 537.9
B 10 245 268853 494.72 2838 2764 537.9
B 3 64 218778 401.62 2838 2764 537.9
C 3 233 2688467 4388.79 2771 2735 612.0
C 4 254 202926 327.14 2771 2735 612.0
C 14 234 67513 105.85 2771 2735 612.0
D 10 70 371761 579.81 2775 2678 636.6
D 2 33 244822 380.39 2775 2678 636.6
D 2 234 185124 286.61 2775 2678 636.6

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