ASTROSAT CZTI

Data Quality Report

Orbit 20211204_A11_065T02_9000004796_level2

Creation date: 2021-12-06T16:49:32.095527
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1A11_065T02_9000004796cztM0_level2_bc.evt modeM0/AS1A11_065T02_9000004796cztM0_level2_quad_clean.evt
Size (bytes)868,075,200264,879,360
Size827.9 MB 252.6 MB
Events in quadrant A3,803,5381,786,098
Events in quadrant B4,998,6191,744,817
Events in quadrant C4,675,1421,743,790
Events in quadrant D11,615,4951,540,956

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03580
B03580
C03580
D03580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0365090
B0412900
C0378170
D0681260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17509260.148495%
B175094912.804272%
C175091430.816723%
D17509224612.827689%

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 23002 17511 1 1 0.00% 0.01%
B 23002 17510 28 28 0.12% 0.16%
C 23002 17510 13 13 0.06% 0.07%
D 23002 17504 164 164 0.71% 0.94%

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 7 192 319509 1607.91 878 863 198.2
A 9 143 31068 152.42 878 863 198.2
A 13 6 29726 145.64 878 863 198.2
B 5 172 952188 5487.39 859 840 173.4
B 5 200 207765 1193.55 859 840 173.4
B 0 213 101734 581.96 859 840 173.4
C 15 214 713124 3651.63 842 831 195.1
C 10 49 285224 1457.96 842 831 195.1
C 0 10 176639 901.29 842 831 195.1
D 8 195 4994767 25754.34 786 758 193.9
D 12 218 864671 4455.24 786 758 193.9
D 2 250 782600 4032.0 786 758 193.9

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