ASTROSAT CZTI

Data Quality Report

Orbit 12655

Creation date: 2024-06-27T16:30:37.053866
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/AS1A04_174T01_9000001876_12655cztM0_level2.evt modeM0/AS1A04_174T01_9000001876_12655cztM0_level2_quad_clean.evt
Size (bytes)640,454,40095,832,000
Size610.8 MB 91.4 MB
Events in quadrant A3,655,217607,974
Events in quadrant B5,145,495574,905
Events in quadrant C3,755,279611,949
Events in quadrant D6,315,021567,882

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161273
B0203452
C0164542
D0241922

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A77561131.456937%
B77566207.993811%
C7756891.147499%
D77565767.426509%

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 7992 7758 3 3 0.04% 0.04%
B 7992 7757 392 392 4.90% 5.05%
C 7992 7758 12 12 0.15% 0.15%
D 7992 7758 487 487 6.09% 6.28%

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 9 143 20504 101.79 936 915 192.4
A 12 189 18429 91.01 936 915 192.4
A 13 248 16090 78.86 936 915 192.4
B 4 239 1400600 7915.69 911 889 176.8
B 3 64 48443 268.93 911 889 176.8
B 3 209 47233 262.09 911 889 176.8
C 15 208 155020 719.03 919 927 214.3
C 12 2 8346 34.62 919 927 214.3
C 14 234 8191 33.9 919 927 214.3
D 1 52 2229032 10334.01 882 856 215.6
D 10 157 665369 3081.93 882 856 215.6
D 13 249 30324 136.67 882 856 215.6

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