ASTROSAT CZTI

Data Quality Report

Orbit 55906

Creation date: 2026-01-30T16:55:33.141186
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_030T02_9000006544_55906cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55906cztM0_level2_quad_clean.evt
Size (bytes)459,910,08093,110,400
Size438.6 MB 88.8 MB
Events in quadrant A4,212,469603,993
Events in quadrant B2,918,476661,244
Events in quadrant C3,854,921574,176
Events in quadrant D5,522,398516,867

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172432
B0137141
C0165311
D0209771

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66412423.644030%
B6642570.858175%
C66422353.538091%
D66425277.934357%

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 7426 6642 178 178 2.40% 2.68%
B 7427 6643 2 2 0.03% 0.03%
C 7427 6643 162 162 2.18% 2.44%
D 7427 6643 504 504 6.79% 7.59%

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 12 115 618072 3616.21 688 670 170.7
A 0 8 492123 2878.51 688 670 170.7
A 15 32 273397 1597.4 688 670 170.7
B 7 0 66521 447.57 682 657 147.2
B 5 185 48423 324.59 682 657 147.2
B 6 255 44642 298.89 682 657 147.2
C 12 252 905325 4964.93 662 656 182.2
C 15 199 209978 1148.78 662 656 182.2
C 12 250 61328 332.98 662 656 182.2
D 11 129 1927060 10383.58 653 624 185.5
D 8 240 455085 2449.56 653 624 185.5
D 3 12 196443 1055.47 653 624 185.5

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