ASTROSAT CZTI

Data Quality Report

Orbit 51657

Creation date: 2025-04-22T09:57:02.220173
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/AS1A13_037T05_9000006460_51657cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51657cztM0_level2_quad_clean.evt
Size (bytes)568,336,320104,074,560
Size542.0 MB 99.3 MB
Events in quadrant A6,726,256628,554
Events in quadrant B4,593,314744,111
Events in quadrant C5,273,376641,796
Events in quadrant D3,887,200636,672

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0249432
B0183882
C0206052
D0167262

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A719197213.516896%
B71902894.019471%
C71905727.955494%
D71901762.447844%

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 7971 7191 634 634 7.95% 8.82%
B 7970 7190 89 89 1.12% 1.24%
C 7970 7191 386 386 4.84% 5.37%
D 7970 7191 79 79 0.99% 1.10%

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 2641226 14134.17 763 745 186.8
A 12 3 574635 3071.96 763 745 186.8
A 12 194 84037 445.85 763 745 186.8
B 1 223 184514 1066.55 799 771 172.3
B 0 171 168201 971.86 799 771 172.3
B 10 44 138127 797.3 799 771 172.3
C 15 189 1081956 5141.58 767 764 210.3
C 12 249 205887 975.46 767 764 210.3
C 12 254 192612 912.33 767 764 210.3
D 8 176 246619 1123.12 786 760 218.9
D 2 120 185313 843.06 786 760 218.9
D 2 249 86938 393.67 786 760 218.9

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