ASTROSAT CZTI

Data Quality Report

Orbit 55495

Creation date: 2025-12-31T05:21:56.184793
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/AS1A14_099T01_9000006536_55495cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55495cztM0_level2_quad_clean.evt
Size (bytes)908,504,64090,878,400
Size866.4 MB 86.7 MB
Events in quadrant A7,601,666658,977
Events in quadrant B3,822,734775,555
Events in quadrant C4,839,645671,573
Events in quadrant D16,759,709101,932

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01602
B01602
C01602
D01602

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A028928957
B0180591033
C020459397
D0566511595

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A780795112.181376%
B7802630.807485%
C78403434.375000%
D7778678487.220365%

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 7872 7848 1127 1127 14.32% 14.36%
B 7844 7824 36 36 0.46% 0.46%
C 7949 7879 256 256 3.22% 3.25%
D 7862 7813 5108 5108 64.97% 65.38%

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 12 115 2333840 11784.29 790 769 198.0
A 3 78 486481 2453.32 790 769 198.0
A 4 159 467937 2359.65 790 769 198.0
B 0 171 258479 1519.91 801 771 169.6
B 10 247 95485 558.61 801 771 169.6
B 5 172 89979 526.13 801 771 169.6
C 13 3 878036 4092.87 787 777 214.3
C 15 147 437841 2039.13 787 777 214.3
C 9 38 110200 510.52 787 777 214.3
D 7 70 12759461 111982.16 389 373 113.9
D 11 129 1785652 15668.78 389 373 113.9
D 6 239 161409 1413.36 389 373 113.9

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