ASTROSAT CZTI

Data Quality Report

Orbit 58501

Creation date: 2026-07-21T10:34:49.093162
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_58501cztM0_level2.fits modeM0/AS1A14_044T04_9000006592_58501cztM0_level2_quad_clean.evt
Size (bytes)523,252,800118,422,720
Size499.0 MB 112.9 MB
Events in quadrant A4,233,622777,199
Events in quadrant B4,649,237828,826
Events in quadrant C4,574,342740,095
Events in quadrant D5,283,754677,683

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181702
B0193032
C0193672
D0215472

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A80831732.140294%
B80843003.711034%
C80842623.240970%
D80834595.678585%

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 9748 8086 35 35 0.36% 0.43%
B 9749 8087 72 72 0.74% 0.89%
C 9749 8087 163 163 1.67% 2.02%
D 9748 8086 334 334 3.43% 4.13%

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 10 17 384328 1669.7 927 901 229.6
A 10 251 131155 567.21 927 901 229.6
A 3 245 57038 244.46 927 901 229.6
B 0 186 401744 2021.31 915 879 198.3
B 5 185 232052 1165.66 915 879 198.3
B 2 249 81302 405.52 915 879 198.3
C 15 157 571696 2320.54 895 887 246.0
C 12 252 173122 700.2 895 887 246.0
C 9 237 144926 585.57 895 887 246.0
D 3 12 766080 3084.53 878 838 248.1
D 8 160 532261 2142.05 878 838 248.1
D 2 31 194309 779.84 878 838 248.1

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