ASTROSAT CZTI

Data Quality Report

Orbit 20180408_T02_039T01_9000002026_level2

Creation date: 2018-04-09T12:06:47.751912
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_039T01_9000002026cztM0_level2_bc.evt modeM0/AS1T02_039T01_9000002026cztM0_level2_quad_clean.evt
Size (bytes)809,663,040264,453,120
Size772.2 MB 252.2 MB
Events in quadrant A5,456,3621,725,264
Events in quadrant B5,585,6951,785,335
Events in quadrant C4,502,1561,759,111
Events in quadrant D7,850,6641,604,764

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03360
B03360
C03360
D03360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0421780
B0437500
C0368250
D0503720

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A164649625.843052%
B164648655.253887%
C164642511.524538%
D1646411226.814869%

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 21565 16465 105 105 0.49% 0.64%
B 21565 16465 11 11 0.05% 0.07%
C 21565 16467 0 0 0.00% 0.00%
D 21565 16467 83 83 0.38% 0.50%

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 9 143 1368789 6050.53 1037 1022 226.1
A 15 157 44741 193.4 1037 1022 226.1
A 1 162 34461 147.92 1037 1022 226.1
B 0 219 799726 3989.17 1060 1044 200.2
B 0 229 191389 950.71 1060 1044 200.2
B 0 189 137974 683.92 1060 1044 200.2
C 3 233 513552 2279.26 1016 1015 224.9
C 0 207 10554 42.42 1016 1015 224.9
C 13 61 6334 23.65 1016 1015 224.9
D 5 222 3079002 13115.3 999 967 234.7
D 8 195 268295 1139.07 999 967 234.7
D 13 249 193965 822.35 999 967 234.7

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