ASTROSAT CZTI

Data Quality Report

Orbit 50874

Creation date: 2025-02-23T02:21:05.036395
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_50874cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50874cztM0_level2_quad_clean.evt
Size (bytes)624,608,640107,971,200
Size595.7 MB 103.0 MB
Events in quadrant A6,714,667678,954
Events in quadrant B4,428,405781,578
Events in quadrant C5,161,913663,555
Events in quadrant D6,218,439609,184

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01560
B01560
C01560
D01560

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0253572
B0185602
C0206792
D0238612

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A770478710.215472%
B77043304.283489%
C77045557.204050%
D77047499.722222%

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 7844 7707 596 596 7.60% 7.73%
B 7844 7707 97 97 1.24% 1.26%
C 7844 7707 231 231 2.94% 3.00%
D 7844 7707 473 473 6.03% 6.14%

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 4 4 661514 3310.36 811 790 199.6
A 7 206 512155 2562.04 811 790 199.6
A 12 80 440158 2201.32 811 790 199.6
B 0 172 162160 909.05 831 798 177.5
B 4 206 152010 851.87 831 798 177.5
B 10 247 142615 798.94 831 798 177.5
C 1 29 1040022 4745.2 807 799 219.0
C 5 10 329284 1499.9 807 799 219.0
C 10 171 199433 906.98 807 799 219.0
D 2 249 648252 2939.47 785 758 220.3
D 11 245 560328 2540.32 785 758 220.3
D 8 48 415643 1883.48 785 758 220.3

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