ASTROSAT CZTI

Data Quality Report

Orbit 55513

Creation date: 2026-01-02T12:16:36.349026
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_55513cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55513cztM0_level2_quad_clean.evt
Size (bytes)2,263,415,040217,851,840
Size2.1 GB 207.8 MB
Events in quadrant A14,852,5081,549,941
Events in quadrant B31,886,600969,755
Events in quadrant C17,811,5871,380,806
Events in quadrant D17,732,0231,353,260

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03980
B03980
C03980
D03980

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0581514
B01083354
C0668924
D0665244

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19463207310.650979%
B19463981550.429019%
C19463341917.566665%
D19463238412.248882%

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 20823 19469 1572 1572 7.55% 8.07%
B 20823 19465 7710 7710 37.03% 39.61%
C 20823 19469 2704 2704 12.99% 13.89%
D 20823 19469 1955 1955 9.39% 10.04%

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 6109601 12633.13 1956 1904 483.5
A 3 14 497105 1024.27 1956 1904 483.5
A 0 8 392264 807.42 1956 1904 483.5
B 5 172 24810798 78783.94 1474 1422 314.9
B 5 236 751722 2382.63 1474 1422 314.9
B 7 252 142044 446.56 1474 1422 314.9
C 9 38 9010248 17882.81 1856 1837 503.7
C 13 3 480376 949.96 1856 1837 503.7
C 15 147 373408 737.61 1856 1837 503.7
D 11 129 7610274 14272.34 1880 1797 533.1
D 2 153 729536 1365.13 1880 1797 533.1
D 7 70 536588 1003.19 1880 1797 533.1

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