ASTROSAT CZTI

Data Quality Report

Orbit 31949

Creation date: 2024-06-27T20:34:28.904120
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/AS1C06_002T04_9000004660_31949cztM0_level2.evt modeM0/AS1C06_002T04_9000004660_31949cztM0_level2_quad_clean.evt
Size (bytes)657,944,640104,604,480
Size627.5 MB 99.8 MB
Events in quadrant A3,094,174726,119
Events in quadrant B6,089,006674,790
Events in quadrant C4,757,173656,522
Events in quadrant D5,553,690664,027

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0131361
B0224911
C0183624
D0209961

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6395641.000782%
B63954947.724785%
C63944216.584298%
D63943215.020332%

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 7285 6395 1 1 0.01% 0.02%
B 7285 6395 326 326 4.47% 5.10%
C 7284 6394 169 169 2.32% 2.64%
D 7284 6394 230 230 3.16% 3.60%

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 13 6 16983 103.38 791 775 156.8
A 12 96 13812 83.15 791 775 156.8
A 13 254 12332 73.71 791 775 156.8
B 6 159 1842147 13057.65 753 735 141.0
B 10 245 612443 4337.69 753 735 141.0
B 5 172 371272 2627.52 753 735 141.0
C 3 233 967829 5628.53 739 743 171.8
C 0 10 734581 4271.0 739 743 171.8
C 14 238 126832 733.85 739 743 171.8
D 12 33 1137339 6352.07 762 743 178.9
D 8 195 939411 5245.91 762 743 178.9
D 13 249 242167 1349.24 762 743 178.9

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