ASTROSAT CZTI

Data Quality Report

Orbit 51941

Creation date: 2025-05-06T10:03:12.371289
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_011T06_9000006468_51941cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51941cztM0_level2_quad_clean.evt
Size (bytes)1,000,696,32065,001,600
Size954.3 MB 62.0 MB
Events in quadrant A8,163,523466,984
Events in quadrant B6,499,726517,013
Events in quadrant C9,594,015342,839
Events in quadrant D12,324,614223,358

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0284671
B0234481
C0326601
D0407626

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01200
B01200
C01200
D01200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5977156226.133512%
B5977126421.147733%
C5977271245.373933%
D5977394265.952819%

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 6906 5977 1451 1451 21.01% 24.28%
B 6906 5977 1033 1033 14.96% 17.28%
C 6906 5977 2450 2450 35.48% 40.99%
D 6906 5977 3875 3875 56.11% 64.83%

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 1847440 12955.01 563 548 142.6
A 15 239 1789365 12547.64 563 548 142.6
A 12 3 1408232 9874.19 563 548 142.6
B 12 32 3419689 28097.94 572 554 121.7
B 4 206 174598 1430.26 572 554 121.7
B 5 32 106307 869.06 572 554 121.7
C 15 224 6087818 44771.46 475 470 136.0
C 15 209 470661 3458.18 475 470 136.0
C 15 147 382883 2812.59 475 470 136.0
D 12 17 9949500 83656.0 404 385 118.9
D 3 12 294181 2470.35 404 385 118.9
D 15 94 89147 746.35 404 385 118.9

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