ASTROSAT CZTI

Data Quality Report

Orbit 52427

Creation date: 2025-06-28T14:02:41.653215
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_037T01_9000006476_52427cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52427cztM0_level2_quad_clean.evt
Size (bytes)911,053,44064,071,360
Size868.8 MB 61.1 MB
Events in quadrant A3,331,096613,918
Events in quadrant B3,355,717663,852
Events in quadrant C13,697,265203,202
Events in quadrant D12,828,835238

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0147241
B0148011
C0451611
D0426317

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65752023.072243%
B65761412.144161%
C6576445767.776764%
D6575657399.969582%

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 7295 6576 90 90 1.23% 1.37%
B 7296 6577 29 29 0.40% 0.44%
C 7295 6576 3963 3963 54.32% 60.26%
D 7294 6574 3187 3187 43.69% 48.48%

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 14 309362 1760.99 694 677 175.3
A 5 240 57562 324.52 694 677 175.3
A 4 3 57074 321.73 694 677 175.3
B 4 171 184144 1231.73 685 660 149.0
B 4 81 143213 956.96 685 660 149.0
B 4 173 66531 442.19 685 660 149.0
C 9 38 6537813 52383.61 450 446 124.8
C 15 248 2154500 17260.33 450 446 124.8
C 1 45 1488391 11922.83 450 446 124.8
D 12 18 10270259 394412.22 71 66 26.0
D 12 17 995975 38246.47 71 66 26.0
D 15 93 753154 28921.28 71 66 26.0

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