ASTROSAT CZTI

Data Quality Report

Orbit 20151125_P01_156T01_9000000122_level2

Creation date: 2017-10-31T18:40:48.501348
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/AS1P01_156T01_9000000122cztM0_level2.evt modeM0/AS1P01_156T01_9000000122cztM0_level2_quad_clean.evt
Size (bytes)3,207,479,040218,041,920
Size3.0 GB 207.9 MB
Events in quadrant A24,167,1441,322,199
Events in quadrant B25,582,1681,343,608
Events in quadrant C23,246,4931,320,669
Events in quadrant D22,853,3241,269,033

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03980
B03980
C03980
D03980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0857120
B0899670
C0829800
D0817500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A195672171.109010%
B195673241.655849%
C195671420.725712%
D195672821.441202%

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 21157 19568 793 793 3.75% 4.05%
B 21157 19567 1091 1091 5.16% 5.58%
C 21157 19567 566 566 2.68% 2.89%
D 21157 19568 832 832 3.93% 4.25%

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 0 214 351851 230.18 6203 6251 1501.4
A 11 79 23659 11.59 6203 6251 1501.4
A 12 189 19382 8.75 6203 6251 1501.4
B 0 184 489265 320.67 6401 6434 1505.7
B 15 22 215671 138.96 6401 6434 1505.7
B 0 220 198993 127.89 6401 6434 1505.7
C 3 111 84716 47.89 5860 6077 1642.1
C 9 54 61832 33.95 5860 6077 1642.1
C 8 208 52794 28.45 5860 6077 1642.1
D 11 131 307509 181.02 5796 5944 1666.0
D 12 22 306420 180.36 5796 5944 1666.0
D 2 16 219017 127.9 5796 5944 1666.0

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