ASTROSAT CZTI

Data Quality Report

Orbit 50357

Creation date: 2025-01-20T10:15:56.869478
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_003T01_9000006442_50357cztM0_level2.fits modeM0/AS1C09_003T01_9000006442_50357cztM0_level2_quad_clean.evt
Size (bytes)3,835,296,000236,934,720
Size3.6 GB 226.0 MB
Events in quadrant A17,572,5892,224,793
Events in quadrant B35,825,9421,495,246
Events in quadrant C39,430,9621,231,154
Events in quadrant D47,276,113548,418

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0686673
B01233663
C01340073
D01570533

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04960
B04960
C04960
D04960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A242816162.536963%
B24281906137.317244%
C242811043942.992463%
D242821818574.890866%

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 25936 24284 440 440 1.70% 1.81%
B 25936 24284 7254 7254 27.97% 29.87%
C 25936 24284 9619 9619 37.09% 39.61%
D 25937 24285 14299 14299 55.13% 58.88%

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 3 1814542 2826.3 2582 2519 641.1
A 4 156 1083330 1685.79 2582 2519 641.1
A 10 253 611694 950.16 2582 2519 641.1
B 4 170 18531403 41250.64 2137 2064 449.2
B 10 44 3293122 7326.66 2137 2064 449.2
B 10 43 1573944 3499.37 2137 2064 449.2
C 15 127 7615868 13089.81 2039 2026 581.7
C 15 230 5924596 10182.16 2039 2026 581.7
C 15 148 1983523 3406.61 2039 2026 581.7
D 7 61 30652878 77521.73 1259 1201 395.4
D 7 126 2277993 5758.28 1259 1201 395.4
D 12 6 1441077 3641.62 1259 1201 395.4

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