ASTROSAT CZTI

Data Quality Report

Orbit 50800

Creation date: 2025-02-18T02:28:08.871731
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_50800cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50800cztM0_level2_quad_clean.evt
Size (bytes)530,979,84091,759,680
Size506.4 MB 87.5 MB
Events in quadrant A3,500,683612,418
Events in quadrant B3,614,336659,210
Events in quadrant C5,415,660560,657
Events in quadrant D6,623,971496,199

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148041
B0153121
C0204711
D0241595

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6450991.534884%
B64512123.286312%
C64515238.107270%
D645086913.472868%

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 7395 6451 45 45 0.61% 0.70%
B 7396 6452 125 125 1.69% 1.94%
C 7396 6451 376 376 5.08% 5.83%
D 7395 6451 836 836 11.30% 12.96%

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 4 3 170224 993.62 681 661 170.7
A 8 38 100537 585.26 681 661 170.7
A 5 240 85760 498.67 681 661 170.7
B 8 128 291693 2012.4 678 653 144.6
B 4 206 209889 1446.77 678 653 144.6
B 5 185 103197 709.04 678 653 144.6
C 5 10 1234310 6784.2 657 649 181.8
C 13 3 267013 1464.8 657 649 181.8
C 10 171 246079 1349.68 657 649 181.8
D 10 172 1258789 7109.28 632 610 177.0
D 15 125 716984 4047.84 632 610 177.0
D 2 249 653109 3686.91 632 610 177.0

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