ASTROSAT CZTI

Data Quality Report

Orbit 51841

Creation date: 2025-04-29T05:08:48.517669
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/AS1C09_011T05_9000006466_51841cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51841cztM0_level2_quad_clean.evt
Size (bytes)659,200,32088,004,160
Size628.7 MB 83.9 MB
Events in quadrant A5,121,409582,397
Events in quadrant B4,057,118671,765
Events in quadrant C4,491,976585,528
Events in quadrant D10,216,731362,693

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0197702
B0168673
C0180572
D0350022

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66285137.739891%
B66271772.670892%
C66273825.764298%
D6627270040.742417%

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 7683 6629 419 419 5.45% 6.32%
B 7682 6628 73 73 0.95% 1.10%
C 7682 6628 316 316 4.11% 4.77%
D 7682 6627 2333 2333 30.37% 35.20%

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 15 174 1103449 6740.62 665 648 163.6
A 12 3 522708 3190.97 665 648 163.6
A 11 3 210765 1284.29 665 648 163.6
B 5 32 296142 2045.72 685 663 144.4
B 5 185 176337 1216.26 685 663 144.4
B 5 172 165782 1143.19 685 663 144.4
C 15 218 790441 4258.94 669 663 185.4
C 13 3 150452 807.75 669 663 185.4
C 15 224 108905 583.7 669 663 185.4
D 11 129 4472172 29712.49 526 506 150.5
D 3 12 1209502 8033.31 526 506 150.5
D 12 6 995330 6610.22 526 506 150.5

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