ASTROSAT CZTI

Data Quality Report

Orbit 20180308_A04_216T01_9000001968_level2

Creation date: 2018-07-03T13:15:40.995212
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/AS1A04_216T01_9000001968cztM0_level2_bc.evt modeM0/AS1A04_216T01_9000001968cztM0_level2_quad_clean.evt
Size (bytes)4,641,621,1201,741,766,400
Size4.3 GB 1.6 GB
Events in quadrant A26,597,79911,477,028
Events in quadrant B42,563,26310,890,887
Events in quadrant C24,045,25211,494,438
Events in quadrant D39,258,77710,737,876

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A024220
B024220
C024220
D024220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02525560
B03326080
C02454400
D02916240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02050
B02050
C02050
D02050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A11901519341.625005%
B1190151323311.118767%
C11901513851.163719%
D11901537343.137420%

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 139201 119020 115 115 0.08% 0.10%
B 139201 118956 1037 1037 0.74% 0.87%
C 139201 119020 14 14 0.01% 0.01%
D 139201 119020 717 717 0.52% 0.60%

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 15 239 1130897 858.12 6025 5916 1311.0
A 12 189 845227 640.21 6025 5916 1311.0
A 8 15 408583 307.15 6025 5916 1311.0
B 4 239 17922926 16367.28 5810 5665 1094.7
B 3 64 473003 426.91 5810 5665 1094.7
B 5 32 289704 259.47 5810 5665 1094.7
C 15 208 557766 421.64 5962 5890 1308.9
C 14 234 106647 76.98 5962 5890 1308.9
C 8 222 40959 26.79 5962 5890 1308.9
D 1 52 6950194 5156.18 5849 5652 1346.8
D 8 195 6096859 4522.59 5849 5652 1346.8
D 13 122 2288581 1695.03 5849 5652 1346.8

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