ASTROSAT CZTI

Data Quality Report

Orbit 50518

Creation date: 2025-01-30T03:44:32.446013
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/AS1T05_239T01_9000006444_50518cztM0_level2.fits modeM0/AS1T05_239T01_9000006444_50518cztM0_level2_quad_clean.evt
Size (bytes)567,054,72095,918,400
Size540.8 MB 91.5 MB
Events in quadrant A5,549,835601,527
Events in quadrant B3,853,211685,147
Events in quadrant C5,782,270584,174
Events in quadrant D5,278,873560,035

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0209543
B0161532
C0218182
D0204022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67906118.998527%
B67902223.269514%
C67905267.746686%
D67903785.567010%

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 7790 6791 499 499 6.41% 7.35%
B 7790 6791 130 130 1.67% 1.91%
C 7790 6791 428 428 5.49% 6.30%
D 7790 6791 350 350 4.49% 5.15%

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 12 250 1204402 6906.5 709 689 174.3
A 8 247 287929 1648.09 709 689 174.3
A 4 3 281270 1609.88 709 689 174.3
B 7 0 288548 1878.04 722 698 153.3
B 12 18 254423 1655.4 722 698 153.3
B 4 170 69712 450.27 722 698 153.3
C 13 3 540492 2764.85 703 695 195.2
C 12 249 371629 1899.93 703 695 195.2
C 15 235 247011 1261.64 703 695 195.2
D 6 42 721628 3696.19 698 673 195.1
D 7 61 583904 2990.11 698 673 195.1
D 1 7 280405 1434.13 698 673 195.1

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