ASTROSAT CZTI

Data Quality Report

Orbit 35161

Creation date: 2022-03-30T21:21:09.655572
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/AS1C07_006T01_9000005040_35161cztM0_level2.evt modeM0/AS1C07_006T01_9000005040_35161cztM0_level2_quad_clean.evt
Size (bytes)120,902,40010,895,040
Size115.3 MB 10.4 MB
Events in quadrant A597,77868,559
Events in quadrant B1,186,79357,988
Events in quadrant C795,83666,737
Events in quadrant D1,013,83062,141

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024062
B041901
C030511
D036941

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A95670.732218%
B95626727.928870%
C956959.937238%
D956899.309623%

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 3081 957 2 2 0.06% 0.21%
B 3081 957 171 171 5.55% 17.87%
C 3081 957 62 62 2.01% 6.48%
D 3081 957 67 67 2.17% 7.00%

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 10 83 35479 1206.03 138 136 29.3
A 9 143 24412 828.39 138 136 29.3
A 13 6 1561 48.63 138 136 29.3
B 5 236 585898 23674.73 121 119 24.7
B 5 172 114541 4624.46 121 119 24.7
B 3 112 6085 241.12 121 119 24.7
C 0 10 231251 7461.28 128 129 31.0
C 15 214 42639 1372.35 128 129 31.0
C 0 207 9481 301.91 128 129 31.0
D 8 195 224475 6705.57 131 127 33.5
D 2 250 216346 6462.6 131 127 33.5
D 7 80 23035 684.7 131 127 33.5

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