ASTROSAT CZTI

Data Quality Report

Orbit 58479

Creation date: 2026-07-20T00:11:20.199975
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_044T04_9000006592_58479cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58479cztM0_level2_quad_clean.evt
Size (bytes)738,054,72084,962,880
Size703.9 MB 81.0 MB
Events in quadrant A7,832,011531,509
Events in quadrant B10,407,545388,750
Events in quadrant C4,089,785610,086
Events in quadrant D4,469,732572,517

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0277272
B0355222
C0169562
D0180243

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6727146521.777910%
B6728315346.863853%
C67282243.329370%
D67272754.088004%

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 7687 6728 1395 1395 18.15% 20.73%
B 7688 6729 2322 2322 30.20% 34.51%
C 7688 6729 154 154 2.00% 2.29%
D 7687 6728 240 240 3.12% 3.57%

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 7 64 4370346 25754.46 681 663 169.7
A 2 143 205979 1210.11 681 663 169.7
A 12 80 172918 1015.25 681 663 169.7
B 2 249 6520460 57073.08 524 504 114.2
B 5 172 1592566 13936.27 524 504 114.2
B 0 186 91904 800.08 524 504 114.2
C 15 1 472121 2390.69 714 707 197.2
C 15 208 136261 687.44 714 707 197.2
C 1 12 121264 611.38 714 707 197.2
D 8 240 644612 3174.6 711 678 202.8
D 2 153 456263 2246.04 711 678 202.8
D 3 12 276154 1358.1 711 678 202.8

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