ASTROSAT CZTI

Data Quality Report

Orbit 55898

Creation date: 2026-01-27T07:50:23.294123
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_55898cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55898cztM0_level2_quad_clean.evt
Size (bytes)375,396,48096,258,240
Size358.0 MB 91.8 MB
Events in quadrant A3,097,721627,069
Events in quadrant B3,040,356673,974
Events in quadrant C3,614,320586,957
Events in quadrant D3,628,052564,926

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143402
B0141182
C0158532
D0157242

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6618731.103052%
B66191251.888503%
C66192603.928086%
D66191121.692099%

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 8863 6621 19 19 0.21% 0.29%
B 8864 6622 26 26 0.29% 0.39%
C 8864 6621 169 169 1.91% 2.55%
D 8864 6622 73 73 0.82% 1.10%

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 3 14 211466 1220.9 695 677 172.7
A 15 32 58665 335.87 695 677 172.7
A 4 249 40461 230.43 695 677 172.7
B 0 153 136932 913.32 694 668 149.2
B 0 199 85787 570.52 694 668 149.2
B 12 111 18000 116.17 694 668 149.2
C 15 199 632905 3449.37 673 667 183.3
C 12 252 305746 1664.45 673 667 183.3
C 6 223 27577 146.82 673 667 183.3
D 8 160 340037 1790.19 677 646 189.6
D 2 31 263701 1387.54 677 646 189.6
D 8 240 92189 482.86 677 646 189.6

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