ASTROSAT CZTI

Data Quality Report

Orbit 51773

Creation date: 2025-04-24T15:32:44.817368
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/AS1A13_090T01_9000006464_51773cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51773cztM0_level2_quad_clean.evt
Size (bytes)683,838,72087,739,200
Size652.2 MB 83.7 MB
Events in quadrant A4,673,725599,992
Events in quadrant B5,430,650659,188
Events in quadrant C3,998,293614,257
Events in quadrant D10,691,978317,472

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0184121
B0207321
C0163021
D0363537

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66845307.929384%
B66845127.660084%
C66841892.827648%
D6683334850.097262%

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 7529 6684 253 253 3.36% 3.79%
B 7529 6685 261 261 3.47% 3.90%
C 7529 6685 93 93 1.24% 1.39%
D 7528 6683 2601 2601 34.55% 38.92%

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 15 174 658638 3791.37 713 697 173.5
A 2 143 345671 1987.9 713 697 173.5
A 12 3 206136 1183.84 713 697 173.5
B 4 206 1852616 12024.47 714 687 154.0
B 1 239 240767 1558.83 714 687 154.0
B 9 223 105703 681.86 714 687 154.0
C 15 218 452842 2309.38 720 715 195.8
C 9 38 215956 1099.41 720 715 195.8
C 15 224 114417 580.77 720 715 195.8
D 11 129 8270983 58807.75 506 489 140.6
D 7 222 120599 854.05 506 489 140.6
D 0 18 74291 524.77 506 489 140.6

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