ASTROSAT CZTI

Data Quality Report

Orbit 55276

Creation date: 2025-12-16T11:23:19.150610
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/AS1A14_009T01_9000006534_55276cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55276cztM0_level2_quad_clean.evt
Size (bytes)570,407,040116,308,800
Size544.0 MB 110.9 MB
Events in quadrant A4,220,551761,294
Events in quadrant B4,915,749802,086
Events in quadrant C4,710,393733,459
Events in quadrant D6,622,466646,752

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01700

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0187881
B0207922
C0200801
D0257511

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A83131541.852520%
B83123774.535611%
C83132232.682545%
D83137809.382894%

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 8673 8314 47 47 0.54% 0.57%
B 8672 8313 96 96 1.11% 1.15%
C 8673 8314 136 136 1.57% 1.64%
D 8673 8314 676 676 7.79% 8.13%

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 12 115 386189 1784.26 892 867 216.0
A 0 8 194007 894.35 892 867 216.0
A 4 3 71656 327.79 892 867 216.0
B 1 159 571807 2970.16 883 848 192.2
B 2 249 388481 2016.49 883 848 192.2
B 4 81 341758 1773.43 883 848 192.2
C 15 147 613862 2571.14 876 868 238.4
C 13 3 260888 1090.63 876 868 238.4
C 12 252 101229 420.95 876 868 238.4
D 7 70 1288701 5413.63 845 809 237.9
D 11 129 915209 3843.67 845 809 237.9
D 11 176 367313 1540.59 845 809 237.9

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