ASTROSAT CZTI

Data Quality Report

Orbit 54868

Creation date: 2025-11-20T11:00:42.908478
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_039T06_9000006526_54868cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54868cztM0_level2_quad_clean.evt
Size (bytes)498,798,720103,933,440
Size475.7 MB 99.1 MB
Events in quadrant A3,386,411689,643
Events in quadrant B3,509,071733,166
Events in quadrant C4,160,423650,851
Events in quadrant D6,841,768566,062

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155472
B01575812
C0176332
D0254892

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72871492.044737%
B72841992.732015%
C72861922.635191%
D728682311.295635%

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 7777 7288 22 22 0.28% 0.30%
B 7776 7286 16 16 0.21% 0.22%
C 7776 7287 72 72 0.93% 0.99%
D 7776 7287 791 791 10.17% 10.85%

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 0 8 117236 579.52 815 795 200.9
A 11 3 35063 170.55 815 795 200.9
A 3 14 31467 152.65 815 795 200.9
B 5 185 101515 579.66 802 772 173.8
B 12 6 85729 488.83 802 772 173.8
B 10 247 60845 345.65 802 772 173.8
C 12 252 372996 1709.85 795 786 217.7
C 14 254 211559 968.25 795 786 217.7
C 4 5 196238 897.86 795 786 217.7
D 11 176 2133386 9807.95 766 733 217.4
D 9 19 487450 2238.38 766 733 217.4
D 11 129 401894 1844.92 766 733 217.4

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