ASTROSAT CZTI

Data Quality Report

Orbit 55880

Creation date: 2026-01-26T02:15:13.884939
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_55880cztM0_level2.fits modeM0/AS1A14_030T02_9000006544_55880cztM0_level2_quad_clean.evt
Size (bytes)589,798,08087,707,520
Size562.5 MB 83.6 MB
Events in quadrant A4,065,923600,384
Events in quadrant B2,982,039666,637
Events in quadrant C3,932,166577,384
Events in quadrant D10,346,630357,356

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0167992
B0137022
C0165192
D0352322

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65043305.073801%
B6505580.891622%
C65052674.104535%
D6505273141.983090%

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 7579 6505 248 248 3.27% 3.81%
B 7580 6506 7 7 0.09% 0.11%
C 7580 6506 194 194 2.56% 2.98%
D 7580 6505 2306 2306 30.42% 35.45%

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 967829 5884.91 666 651 164.3
A 4 249 119507 723.19 666 651 164.3
A 4 3 85269 514.87 666 651 164.3
B 0 199 70972 486.37 672 649 144.6
B 0 197 54742 374.12 672 649 144.6
B 0 153 49024 334.57 672 649 144.6
C 12 254 741027 4117.57 653 647 179.8
C 13 3 250003 1386.78 653 647 179.8
C 12 252 144433 799.66 653 647 179.8
D 11 129 7648896 50935.67 533 511 150.2
D 2 31 175731 1166.91 533 511 150.2
D 7 96 120392 798.37 533 511 150.2

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