ASTROSAT CZTI

Data Quality Report

Orbit 20210221_A10_102T02_9000004200_level2

Creation date: 2021-02-23T10:43:10.180353
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/AS1A10_102T02_9000004200cztM0_level2_bc.evt modeM0/AS1A10_102T02_9000004200cztM0_level2_quad_clean.evt
Size (bytes)4,270,423,6801,398,409,920
Size4.0 GB 1.3 GB
Events in quadrant A19,990,4029,297,412
Events in quadrant B25,121,0669,361,184
Events in quadrant C33,675,9448,996,410
Events in quadrant D44,472,2888,582,764

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018240
B018240
C018240
D018240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01878700
B02079580
C02355330
D02821350

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8926211011.233448%
B8926222572.528512%
C8926242924.808317%
D8926279008.850351%

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 104932 89266 54 54 0.05% 0.06%
B 104932 89265 43 43 0.04% 0.05%
C 104932 89266 125 125 0.12% 0.14%
D 104932 89261 744 744 0.71% 0.83%

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 13 357193 330.67 4994 4931 1065.3
A 15 174 251615 231.56 4994 4931 1065.3
A 13 254 171020 155.91 4994 4931 1065.3
B 10 245 2652932 2835.14 4975 4877 934.0
B 0 229 1714821 1830.75 4975 4877 934.0
B 0 183 682910 725.94 4975 4877 934.0
C 3 233 15100917 13445.75 4763 4758 1122.7
C 2 114 174788 151.44 4763 4758 1122.7
C 10 9 87606 73.79 4763 4758 1122.7
D 1 52 16838395 15493.62 4734 4598 1086.5
D 8 195 5970465 5490.91 4734 4598 1086.5
D 13 104 997705 914.04 4734 4598 1086.5

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