ASTROSAT CZTI

Data Quality Report

Orbit 20180423_A04_010T02_9000002048_level2

Creation date: 2018-04-26T10:39:46.127062
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_010T02_9000002048cztM0_level2_bc.evt modeM0/AS1A04_010T02_9000002048cztM0_level2_quad_clean.evt
Size (bytes)3,001,749,120919,221,120
Size2.8 GB 876.6 MB
Events in quadrant A16,403,4525,920,574
Events in quadrant B16,073,9865,977,804
Events in quadrant C16,278,0965,909,172
Events in quadrant D37,044,2864,895,211

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A015320
B015320
C015320
D015320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01598930
B01582960
C01555000
D02612000

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7487913831.846980%
B7487912941.728121%
C748797320.977577%
D748791325417.700557%

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 86910 74872 61 61 0.07% 0.08%
B 86910 74873 37 37 0.04% 0.05%
C 86910 74873 0 0 0.00% 0.00%
D 86910 74862 647 647 0.74% 0.86%

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 9 143 1098954 1331.37 3800 3723 822.6
A 8 15 277794 333.16 3800 3723 822.6
A 1 162 122673 144.6 3800 3723 822.6
B 10 244 362348 497.93 3831 3724 720.2
B 4 80 335600 460.79 3831 3724 720.2
B 4 173 179511 244.07 3831 3724 720.2
C 3 233 1513213 1810.38 3761 3693 833.8
C 13 61 21801 21.72 3761 3693 833.8
C 12 4 17928 17.07 3761 3693 833.8
D 13 122 16338676 20824.06 3335 3230 784.5
D 1 52 4443175 5659.94 3335 3230 784.5
D 5 222 1113949 1415.92 3335 3230 784.5

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