ASTROSAT CZTI

Data Quality Report

Orbit 20180227_A04_176T02_9000001924_level2

Creation date: 2018-03-05T11:01:02.270444
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_176T02_9000001924cztM0_level2_bc.evt modeM0/AS1A04_176T02_9000001924cztM0_level2_quad_clean.evt
Size (bytes)2,512,468,800405,904,320
Size2.3 GB 387.1 MB
Events in quadrant A8,313,6872,686,224
Events in quadrant B17,492,7032,434,668
Events in quadrant C7,240,3052,709,977
Events in quadrant D40,621,8062,017,884

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07240
B07240
C07240
D07240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0776400
B01329360
C0735450
D01802090

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0480
B0480
C0480
D0480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A355158032.261016%
B35517940726.485908%
C355174021.131852%
D355151448240.777136%

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 40373 35518 1 1 0.00% 0.00%
B 40373 35492 771 771 1.91% 2.17%
C 40373 35520 0 0 0.00% 0.00%
D 40373 35516 10281 10281 25.47% 28.95%

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 391208 964.66 1821 1784 403.7
A 15 223 382963 944.24 1821 1784 403.7
A 8 15 268814 661.47 1821 1784 403.7
B 4 239 7477744 25186.99 1532 1489 296.8
B 0 85 3617451 12181.93 1532 1489 296.8
B 0 219 114735 381.52 1532 1489 296.8
C 15 208 156685 388.02 1792 1763 399.3
C 14 234 40314 96.56 1792 1763 399.3
C 12 4 16506 36.93 1792 1763 399.3
D 1 52 33666020 101716.59 1416 1366 331.0
D 10 157 866113 2612.8 1416 1366 331.0
D 1 255 145413 435.23 1416 1366 331.0

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