ASTROSAT CZTI

Data Quality Report

Orbit 57326

Creation date: 2026-05-03T09:51:18.866952
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_049T03_9000006570_57326cztM0_level2.fits modeM0/AS1A14_049T03_9000006570_57326cztM0_level2_quad_clean.evt
Size (bytes)664,416,00097,202,880
Size633.6 MB 92.7 MB
Events in quadrant A5,288,632659,897
Events in quadrant B3,671,053724,395
Events in quadrant C5,180,268616,626
Events in quadrant D9,896,479440,498

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0207390
B0161030
C0202210
D0343770

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71982733.792720%
B7199981.361300%
C71993124.333935%
D7199233732.462842%

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 7198 7198 245 245 3.40% 3.40%
B 7199 7199 41 41 0.57% 0.57%
C 7199 7199 282 282 3.92% 3.92%
D 7199 7199 1986 1986 27.59% 27.59%

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 0 12 1249948 6644.44 757 738 188.0
A 10 251 1008346 5359.38 757 738 188.0
A 3 14 60402 317.35 757 738 188.0
B 0 213 339744 2082.72 758 728 162.8
B 5 185 114669 699.99 758 728 162.8
B 7 252 80450 489.77 758 728 162.8
C 15 224 1487770 7523.66 730 723 197.6
C 14 254 245713 1239.52 730 723 197.6
C 12 252 116314 584.83 730 723 197.6
D 3 224 6435217 35381.03 644 613 181.9
D 7 96 375489 2061.28 644 613 181.9
D 2 249 268372 1472.29 644 613 181.9

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