ASTROSAT CZTI

Data Quality Report

Orbit 50875

Creation date: 2025-02-23T03:57:22.355114
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_50875cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50875cztM0_level2_quad_clean.evt
Size (bytes)716,235,840104,250,240
Size683.1 MB 99.4 MB
Events in quadrant A8,592,961633,429
Events in quadrant B4,312,947762,971
Events in quadrant C5,490,604649,190
Events in quadrant D7,529,773582,990

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0307881
B0180530
C0216780
D0277190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7582113614.982854%
B75831812.386918%
C75834656.132138%
D758376810.127918%

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 7582 7582 1029 1029 13.57% 13.57%
B 7583 7583 118 118 1.56% 1.56%
C 7583 7583 356 356 4.69% 4.69%
D 7583 7583 767 767 10.11% 10.11%

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 80 2411343 12663.21 771 753 190.4
A 3 98 761123 3994.34 771 753 190.4
A 4 4 566375 2971.3 771 753 190.4
B 4 206 286892 1677.68 793 765 170.5
B 4 170 252388 1475.37 793 765 170.5
B 4 81 172247 1005.47 793 765 170.5
C 1 29 1058025 4980.79 768 759 212.3
C 5 10 274958 1291.75 768 759 212.3
C 13 3 240611 1129.94 768 759 212.3
D 11 245 853271 4122.65 747 724 206.8
D 2 216 547381 2643.46 747 724 206.8
D 2 62 473072 2284.13 747 724 206.8

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