ASTROSAT CZTI

Data Quality Report

Orbit 57661

Creation date: 2026-05-25T22:26:48.215888
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_125T09_9000006578_57661cztM0_level2.fits modeM0/AS1A14_125T09_9000006578_57661cztM0_level2_quad_clean.evt
Size (bytes)483,471,360109,235,520
Size461.1 MB 104.2 MB
Events in quadrant A3,228,490718,399
Events in quadrant B3,866,142765,991
Events in quadrant C5,351,008664,925
Events in quadrant D4,866,450635,015

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154070
B0168210
C0211760
D0197380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7522350.465302%
B7522961.276256%
C75223404.520074%
D75222473.283701%

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 7522 7522 7 7 0.09% 0.09%
B 7522 7522 38 38 0.51% 0.51%
C 7522 7522 270 270 3.59% 3.59%
D 7522 7522 203 203 2.70% 2.70%

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 10 251 27750 132.77 819 796 203.0
A 14 254 17441 81.99 819 796 203.0
A 3 137 10209 46.37 819 796 203.0
B 5 172 147770 846.65 807 775 173.6
B 10 247 140956 807.41 807 775 173.6
B 5 185 126289 722.93 807 775 173.6
C 15 224 1316560 6233.58 776 771 211.1
C 15 198 372666 1761.86 776 771 211.1
C 12 254 172110 811.72 776 771 211.1
D 8 240 717366 3256.71 783 748 220.0
D 7 253 296856 1345.68 783 748 220.0
D 3 12 196884 891.35 783 748 220.0

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