ASTROSAT CZTI

Data Quality Report

Orbit 20180228_G08_037T01_9000001928_level2

Creation date: 2018-08-01T12:15:17.602322
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/AS1G08_037T01_9000001928cztM0_level2_bc.evt modeM0/AS1G08_037T01_9000001928cztM0_level2_quad_clean.evt
Size (bytes)1,418,590,080405,866,880
Size1.3 GB 387.1 MB
Events in quadrant A8,021,0742,620,058
Events in quadrant B14,894,7072,376,327
Events in quadrant C7,381,1312,602,566
Events in quadrant D10,424,0462,439,382

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0715020
B01138480
C0702610
D0816050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06680
B06680
C06680
D06680

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0350
B0350
C0350
D0350

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A327836491.979685%
B32783737822.505567%
C327834851.479425%
D3278313594.145441%

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 41502 32785 15 15 0.04% 0.05%
B 41502 32443 316 316 0.76% 0.97%
C 41502 32784 21 21 0.05% 0.06%
D 41502 32784 154 154 0.37% 0.47%

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 12 189 708253 1942.95 1636 1602 363.7
A 8 15 392320 1074.29 1636 1602 363.7
A 15 223 236363 645.48 1636 1602 363.7
B 4 239 5542381 19619.39 1434 1391 282.4
B 0 85 2492525 8820.54 1434 1391 282.4
B 3 64 480824 1697.56 1434 1391 282.4
C 15 208 984594 2749.27 1610 1583 357.6
C 8 112 32673 86.95 1610 1583 357.6
C 14 234 21129 54.66 1610 1583 357.6
D 1 52 2317183 6249.81 1589 1532 370.5
D 14 34 1112708 2999.0 1589 1532 370.5
D 8 195 363395 976.65 1589 1532 370.5

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