ASTROSAT CZTI

Data Quality Report

Orbit 54239

Creation date: 2025-10-07T15:46:56.731509
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_004T08_9000006514_54239cztM0_level2.fits modeM0/AS1C09_004T08_9000006514_54239cztM0_level2_quad_clean.evt
Size (bytes)703,897,92080,389,440
Size671.3 MB 76.7 MB
Events in quadrant A5,816,045548,033
Events in quadrant B3,626,610680,342
Events in quadrant C3,402,135577,057
Events in quadrant D12,719,188187,021

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0215811
B0150491
C0148761
D0421095

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A633099415.703002%
B63311332.100774%
C63312173.427579%
D6330437969.178515%

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 7450 6331 734 734 9.85% 11.59%
B 7451 6332 38 38 0.51% 0.60%
C 7451 6332 174 174 2.34% 2.75%
D 7449 6329 3512 3512 47.15% 55.49%

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 7 29 2491831 15951.4 635 619 156.2
A 12 17 425325 2719.42 635 619 156.2
A 15 174 218300 1393.83 635 619 156.2
B 5 172 382713 2653.7 672 651 144.0
B 4 171 213867 1480.94 672 651 144.0
B 8 234 85146 586.88 672 651 144.0
C 1 241 510536 2896.17 644 637 176.1
C 14 254 67576 380.21 644 637 176.1
C 12 2 56771 318.83 644 637 176.1
D 8 176 10869360 104627.34 360 343 103.9
D 3 12 137073 1316.19 360 343 103.9
D 14 52 77844 746.04 360 343 103.9

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