ASTROSAT CZTI

Data Quality Report

Orbit 55227

Creation date: 2025-12-13T04:38:58.117157
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_009T01_9000006534_55227cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55227cztM0_level2_quad_clean.evt
Size (bytes)541,618,56091,656,000
Size516.5 MB 87.4 MB
Events in quadrant A4,824,300616,241
Events in quadrant B3,142,047667,583
Events in quadrant C4,198,172577,555
Events in quadrant D7,385,499465,273

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0188993
B0140862
C0171632
D0265042

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64311572.441300%
B6431961.492769%
C64313365.224693%
D6431130020.214586%

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 7561 6431 86 86 1.14% 1.34%
B 7561 6431 48 48 0.63% 0.75%
C 7561 6432 281 281 3.72% 4.37%
D 7561 6432 1267 1267 16.76% 19.70%

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 5 113 1560080 9327.91 672 655 167.2
A 0 250 169362 1009.14 672 655 167.2
A 4 205 132402 788.06 672 655 167.2
B 10 245 110435 763.41 676 650 143.8
B 4 81 106882 738.7 676 650 143.8
B 2 249 69620 479.6 676 650 143.8
C 13 3 810548 4507.26 655 648 179.7
C 12 252 241219 1338.83 655 648 179.7
C 12 254 131537 728.42 655 648 179.7
D 2 249 3349863 19800.11 600 576 169.2
D 11 129 1083931 6404.51 600 576 169.2
D 3 12 258310 1523.66 600 576 169.2

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