ASTROSAT CZTI

Data Quality Report

Orbit 37920

Creation date: 2024-06-27T21:46:08.497355
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_059T01_9000005354_37920cztM0_level2.evt modeM0/AS1T05_059T01_9000005354_37920cztM0_level2_quad_clean.evt
Size (bytes)1,280,854,080184,481,280
Size1.2 GB 175.9 MB
Events in quadrant A8,432,6261,151,863
Events in quadrant B8,912,4161,163,420
Events in quadrant C7,945,8961,165,029
Events in quadrant D12,443,5761,026,501

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0348385
B0368364
C0332324
D0479474

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03220
B03220
C03220
D03220

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0550
B0550
C0550
D0550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15649830.530385%
B156491691.079941%
C15649880.562336%
D15649156710.013419%

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 21138 15653 58 58 0.27% 0.37%
B 21138 15653 91 91 0.43% 0.58%
C 21138 15653 65 65 0.31% 0.42%
D 21138 15653 1411 1411 6.68% 9.01%

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 933256 2622.28 1765 1734 355.2
A 15 222 207621 579.58 1765 1734 355.2
A 13 248 174506 486.36 1765 1734 355.2
B 5 172 521515 1557.51 1759 1711 333.7
B 0 229 515210 1538.61 1759 1711 333.7
B 0 230 244904 728.69 1759 1711 333.7
C 15 214 648162 1613.98 1719 1730 400.5
C 0 10 281890 699.49 1719 1730 400.5
C 14 254 137515 339.02 1719 1730 400.5
D 12 227 3341883 8365.81 1643 1598 399.3
D 1 52 957191 2393.3 1643 1598 399.3
D 2 249 730784 1826.26 1643 1598 399.3

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