ASTROSAT CZTI

Data Quality Report

Orbit 51555

Creation date: 2025-04-09T23:13:05.594863
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_037T05_9000006460_51555cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51555cztM0_level2_quad_clean.evt
Size (bytes)670,109,76087,419,520
Size639.1 MB 83.4 MB
Events in quadrant A10,479,261394,942
Events in quadrant B6,251,259616,691
Events in quadrant C3,390,627612,933
Events in quadrant D4,167,888558,695

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0357011
B0231281
C0150421
D0170812

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6652273141.055322%
B665291813.800361%
C66521402.104630%
D66523214.825616%

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 7532 6651 2525 2525 33.52% 37.96%
B 7533 6652 616 616 8.18% 9.26%
C 7533 6653 90 90 1.19% 1.35%
D 7533 6653 262 262 3.48% 3.94%

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 32 5136288 36031.03 580 567 142.5
A 12 3 991573 6952.67 580 567 142.5
A 12 250 985536 6910.31 580 567 142.5
B 10 44 2740836 18456.58 696 671 148.5
B 4 81 191071 1282.45 696 671 148.5
B 0 171 155650 1043.87 696 671 148.5
C 13 3 371881 1887.33 716 708 196.7
C 0 177 79747 401.89 716 708 196.7
C 14 245 52368 262.68 716 708 196.7
D 12 6 525032 2683.22 700 675 195.4
D 6 42 302593 1544.96 700 675 195.4
D 8 176 217557 1109.82 700 675 195.4

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