ASTROSAT CZTI

Data Quality Report

Orbit 55702

Creation date: 2026-01-15T09:38:40.674281
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_099T04_9000006540_55702cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55702cztM0_level2_quad_clean.evt
Size (bytes)1,328,500,800252,267,840
Size1.2 GB 240.6 MB
Events in quadrant A19,961,2351,431,776
Events in quadrant B7,731,4771,809,750
Events in quadrant C8,613,6151,623,032
Events in quadrant D11,426,0721,487,747

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0723883
B0379203
C0402523
D0476513

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0180
C0180
D0180

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A18662303816.279070%
B18662700.375094%
C186631971.055564%
D186636073.252425%

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 20347 18663 2945 2945 14.47% 15.78%
B 20347 18664 7 7 0.03% 0.04%
C 20348 18666 150 150 0.74% 0.80%
D 20348 18666 584 584 2.87% 3.13%

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 15 32 9056156 20359.7 1802 1755 444.7
A 7 64 2834167 6368.95 1802 1755 444.7
A 0 8 623289 1397.58 1802 1755 444.7
B 12 111 50805 120.35 1903 1830 406.9
B 11 111 47359 111.88 1903 1830 406.9
B 14 111 46343 109.39 1903 1830 406.9
C 13 3 294568 564.22 1884 1866 518.8
C 12 250 151317 288.08 1884 1866 518.8
C 12 252 143255 272.54 1884 1866 518.8
D 11 129 3601197 6876.48 1858 1775 523.4
D 7 129 205267 388.76 1858 1775 523.4
D 5 173 166367 314.44 1858 1775 523.4

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