ASTROSAT CZTI

Data Quality Report

Orbit 55999

Creation date: 2026-02-06T15:33:37.030965
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_066T02_9000006546_55999cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55999cztM0_level2_quad_clean.evt
Size (bytes)493,401,60091,252,800
Size470.5 MB 87.0 MB
Events in quadrant A5,955,796558,271
Events in quadrant B3,584,304661,732
Events in quadrant C3,901,306556,388
Events in quadrant D4,326,738540,831

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0200
C0200
D0200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0221462
B0151182
C0164592
D0173052

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A638772811.398152%
B63871011.581337%
C63864096.404635%
D63862754.306295%

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 7527 6387 717 717 9.53% 11.23%
B 7527 6387 18 18 0.24% 0.28%
C 7526 6386 381 381 5.06% 5.97%
D 7526 6387 250 250 3.32% 3.91%

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 1880188 11528.57 657 643 163.0
A 0 8 760315 4659.6 657 643 163.0
A 4 249 245836 1503.94 657 643 163.0
B 5 236 365916 2498.82 684 660 146.2
B 0 173 156160 1063.82 684 660 146.2
B 0 199 66523 450.59 684 660 146.2
C 12 254 1108619 6181.16 650 644 179.3
C 14 80 144373 801.83 650 644 179.3
C 12 252 36054 197.54 650 644 179.3
D 8 240 712874 3818.38 655 626 186.5
D 6 239 289462 1548.46 655 626 186.5
D 11 129 192977 1031.2 655 626 186.5

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