ASTROSAT CZTI

Data Quality Report

Orbit 54549

Creation date: 2025-10-28T13:25:17.999739
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_127T09_9000006520_54549cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54549cztM0_level2_quad_clean.evt
Size (bytes)529,634,880117,074,880
Size505.1 MB 111.7 MB
Events in quadrant A3,879,103772,635
Events in quadrant B4,495,427814,250
Events in quadrant C5,231,987719,182
Events in quadrant D5,366,550673,078

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0176741
B0193051
C0214963
D0220091

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8141800.982680%
B81412453.009458%
C81403223.955774%
D81413133.844737%

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 8807 8142 55 55 0.62% 0.68%
B 8807 8141 110 110 1.25% 1.35%
C 8806 8141 330 330 3.75% 4.05%
D 8807 8142 301 301 3.42% 3.70%

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 4 249 144515 638.82 901 878 224.8
A 11 3 121424 536.12 901 878 224.8
A 4 3 35450 153.76 901 878 224.8
B 5 185 331960 1718.09 888 854 192.7
B 5 172 150723 777.66 888 854 192.7
B 0 213 127929 659.38 888 854 192.7
C 12 254 627075 2644.47 864 857 236.8
C 12 252 575737 2427.68 864 857 236.8
C 13 3 269740 1135.47 864 857 236.8
D 6 239 861191 3541.86 856 818 242.9
D 3 12 459395 1887.8 856 818 242.9
D 8 160 273717 1123.43 856 818 242.9

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