ASTROSAT CZTI

Data Quality Report

Orbit 54839

Creation date: 2025-11-17T01:18:28.951847
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_039T06_9000006526_54839cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54839cztM0_level2_quad_clean.evt
Size (bytes)458,769,600103,982,400
Size437.5 MB 99.2 MB
Events in quadrant A3,587,756680,185
Events in quadrant B3,705,277725,846
Events in quadrant C3,995,765641,463
Events in quadrant D5,128,412595,134

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0161441
B0163592
C0172011
D0204871

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72651942.670337%
B72651872.573985%
C72652583.551273%
D72654005.505850%

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 7705 7266 70 70 0.91% 0.96%
B 7705 7266 32 32 0.42% 0.44%
C 7705 7266 154 154 2.00% 2.12%
D 7705 7266 264 264 3.43% 3.63%

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 12 17 234254 1198.93 791 770 194.7
A 8 206 115227 587.73 791 770 194.7
A 12 194 35046 176.01 791 770 194.7
B 5 236 201221 1183.05 780 751 169.5
B 10 247 166093 975.75 780 751 169.5
B 5 185 105883 620.42 780 751 169.5
C 4 5 253217 1208.65 768 762 208.9
C 12 252 172180 820.68 768 762 208.9
C 6 223 171710 818.43 768 762 208.9
D 15 94 399151 1831.54 761 727 217.5
D 3 12 367177 1684.55 761 727 217.5
D 11 176 295989 1357.31 761 727 217.5

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