ASTROSAT CZTI

Data Quality Report

Orbit 56859

Creation date: 2026-04-01T23:29:57.260422
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_083T03_9000006562_56859cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56859cztM0_level2_quad_clean.evt
Size (bytes)579,850,56093,988,800
Size553.0 MB 89.6 MB
Events in quadrant A7,776,083525,976
Events in quadrant B3,662,091685,727
Events in quadrant C3,623,847620,571
Events in quadrant D5,865,313531,957

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280691
B0159871
C0159211
D0223375

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6912159123.017940%
B69122353.399884%
C6913680.983654%
D691280911.704282%

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 7072 6914 1435 1435 20.29% 20.75%
B 7072 6913 99 99 1.40% 1.43%
C 7073 6915 65 65 0.92% 0.94%
D 7072 6914 764 764 10.80% 11.05%

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 62 2656792 15946.2 670 651 166.6
A 7 64 2442757 14661.24 670 651 166.6
A 3 14 26151 153.09 670 651 166.6
B 5 185 290895 1894.59 715 687 153.2
B 10 16 265409 1728.21 715 687 153.2
B 0 245 64575 417.09 715 687 153.2
C 9 38 403589 2076.85 711 705 194.0
C 13 3 219164 1126.15 711 705 194.0
C 1 16 64287 327.76 711 705 194.0
D 2 249 2196377 11452.9 678 647 191.7
D 8 240 662613 3452.81 678 647 191.7
D 3 12 93126 482.37 678 647 191.7

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