ASTROSAT CZTI

Data Quality Report

Orbit 27870

Creation date: 2024-06-27T19:45:24.828988
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/AS1A10_002T05_9000004024_27870cztM0_level2.evt modeM0/AS1A10_002T05_9000004024_27870cztM0_level2_quad_clean.evt
Size (bytes)647,746,560116,043,840
Size617.7 MB 110.7 MB
Events in quadrant A4,002,621766,344
Events in quadrant B5,308,973736,784
Events in quadrant C4,215,622727,121
Events in quadrant D5,524,328704,050

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0173300
B0213250
C0179490
D0221530

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8348971.161955%
B83483033.629612%
C83481862.228079%
D83484905.869669%

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 8918 8350 1 1 0.01% 0.01%
B 8918 8348 70 70 0.78% 0.84%
C 8918 8348 0 0 0.00% 0.00%
D 8918 8349 239 239 2.68% 2.86%

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 14682 65.1 1034 1011 210.0
A 3 137 9948 42.56 1034 1011 210.0
A 0 226 8925 37.69 1034 1011 210.0
B 10 245 742297 3822.52 1011 982 193.9
B 10 246 165806 849.9 1011 982 193.9
B 0 230 151936 778.38 1011 982 193.9
C 3 233 186089 789.44 989 993 234.5
C 14 238 155641 659.58 989 993 234.5
C 6 112 9087 34.52 989 993 234.5
D 1 52 1200486 5097.89 987 961 235.3
D 2 250 450080 1908.72 987 961 235.3
D 2 234 41030 170.29 987 961 235.3

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