ASTROSAT CZTI

Data Quality Report

Orbit 20210311_A10_064T03_9000004246_level2

Creation date: 2021-03-16T11:46:26.981507
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_064T03_9000004246cztM0_level2_bc.evt modeM0/AS1A10_064T03_9000004246cztM0_level2_quad_clean.evt
Size (bytes)7,007,469,1201,442,335,680
Size6.5 GB 1.3 GB
Events in quadrant A19,090,36110,216,860
Events in quadrant B19,926,56010,415,522
Events in quadrant C26,563,2179,822,528
Events in quadrant D140,689,3637,206,181

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A017860
B017860
C017860
D017860

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01819520
B01854520
C02128940
D05962410

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A876808390.956889%
B8768010821.234033%
C8768031863.633668%
D876805260359.994297%

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 102130 87682 12 12 0.01% 0.01%
B 102130 87681 9 9 0.01% 0.01%
C 102130 87668 23 23 0.02% 0.03%
D 102130 87624 20522 20522 20.09% 23.42%

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 13 254 161930 151.18 4858 4785 1039.4
A 15 174 85378 77.53 4858 4785 1039.4
A 12 96 83417 75.65 4858 4785 1039.4
B 0 190 325896 346.57 4912 4806 926.5
B 5 172 202222 213.08 4912 4806 926.5
B 0 230 192260 202.33 4912 4806 926.5
C 3 233 6935655 6182.8 4677 4673 1121.0
C 7 247 1181108 1049.44 4677 4673 1121.0
C 14 254 262201 229.73 4677 4673 1121.0
D 8 195 82228197 96158.93 3662 3550 855.1
D 1 52 20007889 23394.4 3662 3550 855.1
D 12 33 13685113 16000.12 3662 3550 855.1

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