ASTROSAT CZTI

Data Quality Report

Orbit 54519

Creation date: 2025-10-26T12:51:21.064913
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_127T09_9000006520_54519cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54519cztM0_level2_quad_clean.evt
Size (bytes)592,902,720100,160,640
Size565.4 MB 95.5 MB
Events in quadrant A3,875,211700,350
Events in quadrant B3,616,703726,487
Events in quadrant C10,321,691461,493
Events in quadrant D3,558,472629,381

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0169462
B0163672
C0358272
D0162922

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B060
C060
D060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A74001612.175676%
B74002913.932432%
C7400258134.878378%
D7400430.581081%

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 7955 7401 88 88 1.11% 1.19%
B 7955 7401 124 124 1.56% 1.68%
C 7955 7400 2222 2222 27.93% 30.03%
D 7955 7401 19 19 0.24% 0.26%

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 8 245 228095 1128.44 812 792 201.4
A 11 3 215081 1063.83 812 792 201.4
A 4 3 74192 364.39 812 792 201.4
B 5 185 343047 2005.53 785 755 170.7
B 10 247 41150 236.68 785 755 170.7
B 0 213 31832 182.08 785 755 170.7
C 4 5 7149871 38976.51 664 657 183.4
C 9 38 340534 1852.96 664 657 183.4
C 13 3 69891 377.45 664 657 183.4
D 7 70 194244 870.89 782 749 222.2
D 3 12 64862 288.56 782 749 222.2
D 6 239 56358 250.29 782 749 222.2

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