ASTROSAT CZTI

Data Quality Report

Orbit 20180217_A04_115T02_9000001900_level2

Creation date: 2018-07-07T18:38:36.046476
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_115T02_9000001900cztM0_level2_bc.evt modeM0/AS1A04_115T02_9000001900cztM0_level2_quad_clean.evt
Size (bytes)4,199,094,7201,153,221,120
Size3.9 GB 1.1 GB
Events in quadrant A23,627,1717,263,832
Events in quadrant B34,097,2556,833,836
Events in quadrant C19,571,0657,370,966
Events in quadrant D43,194,9566,736,749

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019980
B019980
C019980
D019980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02223910
B02739400
C02012110
D02874240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9803719191.957424%
B980371093711.155992%
C980376710.684435%
D9803792019.385232%

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 111568 98041 165 165 0.15% 0.17%
B 111568 97863 881 881 0.79% 0.90%
C 111568 98040 1 1 0.00% 0.00%
D 111568 98037 2978 2978 2.67% 3.04%

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 15 239 1436157 1319.85 5035 4940 1084.4
A 1 162 1018331 934.54 5035 4940 1084.4
A 15 223 943207 865.26 5035 4940 1084.4
B 4 239 10314073 11315.9 4760 4631 911.1
B 3 64 4365585 4786.69 4760 4631 911.1
B 0 214 261103 281.51 4760 4631 911.1
C 4 112 43375 35.59 4969 4904 1080.9
C 14 234 33520 26.47 4969 4904 1080.9
C 13 61 29581 22.83 4969 4904 1080.9
D 1 52 15280492 13886.81 4813 4642 1100.0
D 12 110 5689384 5167.82 4813 4642 1100.0
D 10 157 1540892 1396.56 4813 4642 1100.0

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