ASTROSAT CZTI

Data Quality Report

Orbit 54499

Creation date: 2025-10-25T03:31:08.519486
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_54499cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54499cztM0_level2_quad_clean.evt
Size (bytes)473,814,720100,653,120
Size451.9 MB 96.0 MB
Events in quadrant A3,697,468672,333
Events in quadrant B3,755,465713,430
Events in quadrant C6,047,715579,560
Events in quadrant D3,499,706599,171

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0157992
B0161312
C0226912
D0155982

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A69321081.557992%
B69331402.019328%
C693380011.539016%
D69331021.471225%

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 8872 6934 41 41 0.46% 0.59%
B 8873 6935 22 22 0.25% 0.32%
C 8873 6935 664 664 7.48% 9.57%
D 8873 6935 39 39 0.44% 0.56%

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 8 246 152106 798.17 772 755 189.6
A 4 3 120927 633.74 772 755 189.6
A 8 249 114494 599.82 772 755 189.6
B 0 151 195777 1183.3 763 736 164.8
B 5 172 146658 885.3 763 736 164.8
B 2 249 87279 525.05 763 736 164.8
C 7 64 2513325 12552.64 723 715 200.2
C 13 3 186821 929.76 723 715 200.2
C 1 29 145086 721.26 723 715 200.2
D 3 12 97197 444.1 756 719 217.2
D 2 120 92852 424.1 756 719 217.2
D 2 172 83719 382.06 756 719 217.2

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