ASTROSAT CZTI

Data Quality Report

Orbit 55519

Creation date: 2026-01-21T17:17:29.009355
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_099T01_9000006536_55519cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55519cztM0_level2_quad_clean.evt
Size (bytes)394,012,80098,196,480
Size375.8 MB 93.6 MB
Events in quadrant A3,354,936649,911
Events in quadrant B3,098,071691,446
Events in quadrant C3,241,649608,831
Events in quadrant D4,385,477570,833

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144342
B0139312
C0144952
D0174662

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64881261.942047%
B64881532.358200%
C64881121.726264%
D64882393.683724%

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 7608 6489 2 2 0.03% 0.03%
B 7608 6489 12 12 0.16% 0.18%
C 7608 6489 45 45 0.59% 0.69%
D 7608 6489 113 113 1.49% 1.74%

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 4 159 435933 2468.31 718 699 176.3
A 0 8 37155 206.75 718 699 176.3
A 3 62 33432 185.64 718 699 176.3
B 10 247 79157 529.18 703 678 148.3
B 4 206 54962 366.03 703 678 148.3
B 9 254 54955 365.98 703 678 148.3
C 15 157 169575 894.84 689 681 188.7
C 13 3 121844 641.95 689 681 188.7
C 12 252 88935 467.59 689 681 188.7
D 7 70 660193 3393.37 688 657 194.4
D 2 153 328495 1686.75 688 657 194.4
D 15 125 186117 954.21 688 657 194.4

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