ASTROSAT CZTI

Data Quality Report

Orbit 51704

Creation date: 2025-04-22T12:01:17.823061
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_031T01_9000006462_51704cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51704cztM0_level2_quad_clean.evt
Size (bytes)639,901,440120,507,840
Size610.3 MB 114.9 MB
Events in quadrant A6,459,503793,809
Events in quadrant B5,765,400822,488
Events in quadrant C5,479,383743,759
Events in quadrant D5,328,391702,271

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0251630
B0229670
C0222440
D0218090

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01680
B01680
C01680
D01680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A84451651.953819%
B84455856.927176%
C84463794.487331%
D84462563.031021%

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 8445 8445 74 74 0.88% 0.88%
B 8445 8445 341 341 4.04% 4.04%
C 8446 8446 264 264 3.13% 3.13%
D 8446 8446 219 219 2.59% 2.59%

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 913115 4052.63 915 894 225.1
A 3 14 617964 2741.4 915 894 225.1
A 3 46 479947 2128.24 915 894 225.1
B 1 223 1609530 8487.84 890 861 189.5
B 0 213 220914 1161.07 890 861 189.5
B 8 128 50817 263.58 890 861 189.5
C 15 189 613167 2526.6 885 879 242.3
C 12 254 481159 1981.87 885 879 242.3
C 15 178 259787 1068.38 885 879 242.3
D 7 60 892710 3671.71 880 848 242.9
D 3 12 149122 610.43 880 848 242.9
D 6 228 137476 562.48 880 848 242.9

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