ASTROSAT CZTI

Data Quality Report

Orbit 20171003_A04_055T02_9000001576_level2

Creation date: 2017-10-18T18:41:00.996067
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_055T02_9000001576cztM0_level2.evt modeM0/AS1A04_055T02_9000001576cztM0_level2_quad_clean.evt
Size (bytes)7,699,176,0001,204,182,720
Size7.2 GB 1.1 GB
Events in quadrant A64,113,9157,574,867
Events in quadrant B63,781,1737,689,221
Events in quadrant C40,997,5877,798,988
Events in quadrant D58,230,3147,247,466

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018320
B018320
C018320
D018320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02493350
B02490060
C01850130
D02344070

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8987461816.877406%
B8987562216.921836%
C898756580.732128%
D8987445275.037052%

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 105410 89889 3834 3834 3.64% 4.27%
B 105410 89890 3434 3434 3.26% 3.82%
C 105410 89891 7 7 0.01% 0.01%
D 105410 89890 3590 3590 3.41% 3.99%

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 8 5 15511815 7292.64 10624 10425 2125.6
A 13 251 6385116 2998.98 10624 10425 2125.6
A 15 223 316633 144.06 10624 10425 2125.6
B 4 239 19323888 9646.26 10690 10449 2002.2
B 10 245 988082 488.29 10690 10449 2002.2
B 0 214 544885 266.93 10690 10449 2002.2
C 13 61 78098 28.15 10481 10532 2400.0
C 14 234 63371 22.02 10481 10532 2400.0
C 8 222 40154 12.34 10481 10532 2400.0
D 13 152 6411699 2573.17 10320 10040 2487.8
D 1 52 2877041 1152.4 10320 10040 2487.8
D 12 33 2448216 980.03 10320 10040 2487.8

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