ASTROSAT CZTI

Data Quality Report

Orbit 37175

Creation date: 2024-06-27T21:36:31.905905
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/AS1A11_079T01_9000005284_37175cztM0_level2.evt modeM0/AS1A11_079T01_9000005284_37175cztM0_level2_quad_clean.evt
Size (bytes)417,836,16091,779,840
Size398.5 MB 87.5 MB
Events in quadrant A2,751,674621,863
Events in quadrant B2,705,218623,341
Events in quadrant C2,953,605608,709
Events in quadrant D3,898,353569,242

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0240
B0240
C0240
D0250

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0113143
B0111252
C0117232
D0148732

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5083190.373795%
B5083320.629549%
C5083761.495180%
D50832605.115090%

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 7176 5084 11 11 0.15% 0.22%
B 7176 5084 13 13 0.18% 0.26%
C 7176 5084 60 60 0.84% 1.18%
D 7176 5084 232 232 3.23% 4.56%

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 10 83 254017 2023.12 620 609 125.3
A 9 143 52943 417.82 620 609 125.3
A 8 144 38942 306.04 620 609 125.3
B 5 172 113217 972.03 606 590 115.9
B 0 190 96712 829.58 606 590 115.9
B 4 232 42502 361.72 606 590 115.9
C 0 10 268356 1940.4 594 600 138.0
C 15 214 218138 1576.47 594 600 138.0
C 10 49 38861 277.27 594 600 138.0
D 2 249 540735 3759.05 594 579 143.7
D 1 52 456656 3173.93 594 579 143.7
D 12 6 262194 1820.63 594 579 143.7

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