ASTROSAT CZTI

Data Quality Report

Orbit 53557

Creation date: 2025-08-22T18:34:52.770002
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_004T05_9000006502_53557cztM0_level2.fits modeM0/AS1A14_004T05_9000006502_53557cztM0_level2_quad_clean.evt
Size (bytes)686,865,60081,262,080
Size655.0 MB 77.5 MB
Events in quadrant A8,279,355448,572
Events in quadrant B3,670,582645,319
Events in quadrant C9,150,355401,266
Events in quadrant D3,863,057549,003

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0287151
B0147761
C0312181
D0154201

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5964197533.115359%
B59652964.962280%
C5965212835.674769%
D59652103.520536%

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 7133 5963 1707 1707 23.93% 28.63%
B 7134 5964 168 168 2.35% 2.82%
C 7134 5964 2078 2078 29.13% 34.84%
D 7134 5965 133 133 1.86% 2.23%

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 3 63 3128329 21178.45 597 583 147.7
A 3 62 1179864 7985.09 597 583 147.7
A 12 115 697731 4720.5 597 583 147.7
B 5 185 558894 3964.41 665 644 140.8
B 15 20 145555 1029.09 665 644 140.8
B 10 247 77641 546.79 665 644 140.8
C 1 241 3930543 26208.05 539 533 150.0
C 12 254 1289776 8597.57 539 533 150.0
C 15 178 817676 5449.28 539 533 150.0
D 13 153 158671 843.36 665 635 187.4
D 14 50 115325 612.04 665 635 187.4
D 15 94 114946 610.02 665 635 187.4

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