ASTROSAT CZTI

Data Quality Report

Orbit 57775

Creation date: 2026-06-02T17:52:00.062485
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_083T16_9000006580_57775cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57775cztM0_level2_quad_clean.evt
Size (bytes)506,102,400103,631,040
Size482.7 MB 98.8 MB
Events in quadrant A3,523,135683,240
Events in quadrant B3,767,736720,755
Events in quadrant C6,722,774608,869
Events in quadrant D4,150,567614,221

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160920
B0165390
C0250480
D0177510

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A73342032.767930%
B73333524.800218%
C733380811.018683%
D73342253.067903%

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 7334 7334 39 39 0.53% 0.53%
B 7333 7333 56 56 0.76% 0.76%
C 7333 7333 395 395 5.39% 5.39%
D 7334 7334 150 150 2.05% 2.05%

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 14 334462 1711.33 792 769 195.0
A 3 61 59208 299.7 792 769 195.0
A 4 158 42183 212.39 792 769 195.0
B 4 171 339113 2055.49 780 753 164.6
B 4 80 97360 586.87 780 753 164.6
B 7 9 45343 270.88 780 753 164.6
C 9 38 2369066 11693.15 750 744 202.5
C 15 224 1172322 5784.45 750 744 202.5
C 14 254 65802 321.21 750 744 202.5
D 3 224 273412 1279.58 768 733 213.1
D 8 160 240512 1125.19 768 733 213.1
D 3 12 221167 1034.41 768 733 213.1

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