ASTROSAT CZTI

Data Quality Report

Orbit 20180927_T02_110T01_9000002388_level2

Creation date: 2018-10-03T15:32:17.587282
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_110T01_9000002388cztM0_level2_bc.evt modeM0/AS1T02_110T01_9000002388cztM0_level2_quad_clean.evt
Size (bytes)1,021,858,560381,597,120
Size974.5 MB 363.9 MB
Events in quadrant A8,582,9652,405,768
Events in quadrant B7,021,0192,415,703
Events in quadrant C5,923,2972,320,307
Events in quadrant D7,337,6552,322,050

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06200
B06200
C06200
D06200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0720510
B0660980
C0625990
D0666090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A304737512.464477%
B304733701.214190%
C304733401.115742%
D304732890.948381%

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 32859 30475 36 36 0.11% 0.12%
B 32859 30475 3 3 0.01% 0.01%
C 32859 30474 1 1 0.00% 0.00%
D 32859 30475 20 20 0.06% 0.07%

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 15 174 1372277 4157.2 1509 1480 329.7
A 4 2 418737 1265.41 1509 1480 329.7
A 0 253 416203 1257.72 1509 1480 329.7
B 3 64 371417 1267.81 1517 1475 291.8
B 0 198 239564 815.94 1517 1475 291.8
B 0 219 138299 468.9 1517 1475 291.8
C 7 247 154677 443.37 1459 1445 345.6
C 0 207 69171 195.96 1459 1445 345.6
C 3 233 67188 190.23 1459 1445 345.6
D 2 233 861038 2451.09 1507 1453 350.7
D 1 52 219710 622.36 1507 1453 350.7
D 15 0 166054 469.36 1507 1453 350.7

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