ASTROSAT CZTI

Data Quality Report

Orbit 20180914_T02_091T01_9000002368_level2

Creation date: 2018-09-15T16:44:02.685643
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_091T01_9000002368cztM0_level2_bc.evt modeM0/AS1T02_091T01_9000002368cztM0_level2_quad_clean.evt
Size (bytes)2,681,827,2001,120,608,000
Size2.5 GB 1.0 GB
Events in quadrant A18,075,9097,186,843
Events in quadrant B20,575,5267,270,243
Events in quadrant C18,040,9807,029,697
Events in quadrant D18,997,7676,896,033

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016480
B016480
C016480
D016480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01270
B01270
C01270
D01270

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01713280
B01818840
C01733280
D01731420

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A811309811.209170%
B8113016742.063355%
C8113013201.627018%
D811308161.005793%

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 93541 81119 27 27 0.03% 0.03%
B 93541 81122 35 35 0.04% 0.04%
C 93541 81123 5 5 0.01% 0.01%
D 93541 81121 22 22 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 12 96 131816 127.37 4551 4471 999.8
A 9 143 130869 126.42 4551 4471 999.8
A 15 174 104523 100.07 4551 4471 999.8
B 15 222 695188 783.63 4573 4480 881.4
B 4 173 538057 605.36 4573 4480 881.4
B 7 220 442159 496.56 4573 4480 881.4
C 3 233 1007700 965.34 4398 4403 1039.3
C 10 22 69406 62.54 4398 4403 1039.3
C 7 247 34245 28.71 4398 4403 1039.3
D 2 152 776933 735.17 4501 4364 1050.9
D 2 14 436792 411.5 4501 4364 1050.9
D 2 234 308181 289.11 4501 4364 1050.9

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