ASTROSAT CZTI

Data Quality Report

Orbit 51859

Creation date: 2025-04-30T11:10:28.372636
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_011T05_9000006466_51859cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51859cztM0_level2_quad_clean.evt
Size (bytes)607,366,08093,015,360
Size579.2 MB 88.7 MB
Events in quadrant A4,852,229626,098
Events in quadrant B3,729,314699,485
Events in quadrant C3,644,138623,634
Events in quadrant D9,735,430398,085

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0191052
B0158752
C0158522
D0336492

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67241672.483641%
B67241151.710291%
C67231031.532054%
D6723239335.594229%

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 7816 6726 121 121 1.55% 1.80%
B 7816 6725 56 56 0.72% 0.83%
C 7815 6724 60 60 0.77% 0.89%
D 7815 6725 2322 2322 29.71% 34.53%

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 3 689090 3977.78 692 674 173.1
A 0 228 309166 1782.52 692 674 173.1
A 4 3 187808 1081.29 692 674 173.1
B 5 185 219207 1481.51 697 672 147.5
B 0 171 103067 694.16 697 672 147.5
B 0 213 95349 641.84 697 672 147.5
C 12 252 195165 1038.89 678 674 187.2
C 10 22 158548 843.3 678 674 187.2
C 13 3 155388 826.42 678 674 187.2
D 11 129 6456235 41832.22 544 524 154.3
D 8 176 418927 2711.2 544 524 154.3
D 3 12 188238 1216.36 544 524 154.3

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