ASTROSAT CZTI

Data Quality Report

Orbit 20180807_A04_203T01_9000002284_level2

Creation date: 2018-08-09T13:38:57.499177
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_203T01_9000002284cztM0_level2_bc.evt modeM0/AS1A04_203T01_9000002284cztM0_level2_quad_clean.evt
Size (bytes)3,132,840,9601,014,696,000
Size2.9 GB 967.7 MB
Events in quadrant A18,551,4206,368,256
Events in quadrant B19,020,1956,429,569
Events in quadrant C20,295,9836,270,398
Events in quadrant D31,387,0376,004,207

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01774960
B01783780
C01812050
D02194660

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016780
B016780
C016780
D016780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8259412011.454101%
B8259412191.475894%
C825949021.092089%
D8259436054.364724%

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 96440 82592 17 17 0.02% 0.02%
B 96440 82593 19 19 0.02% 0.02%
C 96441 82594 4 4 0.00% 0.00%
D 96441 82593 828 828 0.86% 1.00%

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 14 238 579134 597.79 4487 4405 961.4
A 12 96 165688 167.75 4487 4405 961.4
A 14 237 164709 166.74 4487 4405 961.4
B 3 209 342106 406.02 4505 4399 831.8
B 0 189 282102 333.88 4505 4399 831.8
B 0 230 221318 260.8 4505 4399 831.8
C 3 233 3138532 3326.21 4322 4295 942.3
C 10 22 64626 64.03 4322 4295 942.3
C 14 225 57619 56.59 4322 4295 942.3
D 1 52 10177857 10031.6 4371 4215 1014.2
D 2 33 1495474 1470.44 4371 4215 1014.2
D 5 222 1226105 1204.83 4371 4215 1014.2

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