ASTROSAT CZTI

Data Quality Report

Orbit 50816

Creation date: 2025-02-19T04:45:05.378732
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/AS1C07_001T01_9000006450_50816cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50816cztM0_level2_quad_clean.evt
Size (bytes)704,139,840101,638,080
Size671.5 MB 96.9 MB
Events in quadrant A6,757,051647,744
Events in quadrant B6,327,567690,652
Events in quadrant C5,038,848668,745
Events in quadrant D7,358,010546,089

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01540
B01540
C01540
D01540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0252583
B0240474
C0201763
D0272083

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A753386211.442984%
B7532100813.382900%
C75322212.934148%
D7532124516.529474%

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 7758 7536 740 740 9.54% 9.82%
B 7757 7535 655 655 8.44% 8.69%
C 7757 7535 121 121 1.56% 1.61%
D 7757 7535 818 818 10.55% 10.86%

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 6 161 1191692 6247.83 770 752 190.6
A 14 254 906176 4749.97 770 752 190.6
A 4 191 668495 3503.07 770 752 190.6
B 4 206 2735529 16803.73 772 746 162.7
B 8 128 135951 830.76 772 746 162.7
B 10 28 56111 340.19 772 746 162.7
C 5 10 535919 2449.52 788 777 218.5
C 9 38 320116 1461.72 788 777 218.5
C 13 3 256997 1172.8 788 777 218.5
D 15 123 1555458 7852.01 708 680 198.0
D 1 47 653990 3299.37 708 680 198.0
D 2 249 591597 2984.27 708 680 198.0

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