ASTROSAT CZTI

Data Quality Report

Orbit 52901

Creation date: 2025-07-16T16:10:11.448977
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/AS1C09_011T06_9000006484_52901cztM0_level2.fits modeM0/AS1C09_011T06_9000006484_52901cztM0_level2_quad_clean.evt
Size (bytes)1,116,866,88043,876,800
Size1.0 GB 41.8 MB
Events in quadrant A15,098,787584
Events in quadrant B7,787,915437,458
Events in quadrant C10,463,8124,773
Events in quadrant D7,502,117444,095

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0491051
B0275181
C0355191
D0266671

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6325632099.920949%
B6324231436.590765%
C6324629999.604681%
D6324138621.916509%

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 7299 6324 6156 6156 84.34% 97.34%
B 7298 6323 1751 1751 23.99% 27.69%
C 7298 6323 2647 2647 36.27% 41.86%
D 7298 6323 1260 1260 17.27% 19.93%

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 9 191 14587298 531653.79 100 97 27.4
A 0 29 23957 869.6 100 97 27.4
A 12 17 11548 417.33 100 97 27.4
B 12 32 4998684 43779.93 529 511 114.2
B 10 254 200007 1747.42 529 511 114.2
B 10 44 190015 1659.9 529 511 114.2
C 15 198 9935909 542910.92 58 57 18.3
C 7 80 184535 10080.17 58 57 18.3
C 2 12 43912 2396.31 58 57 18.3
D 8 176 3461541 21461.84 560 535 161.3
D 15 94 514323 3186.02 560 535 161.3
D 15 174 346760 2146.96 560 535 161.3

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