ASTROSAT CZTI

Data Quality Report

Orbit 54855

Creation date: 2025-11-18T03:39:00.530234
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_54855cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54855cztM0_level2_quad_clean.evt
Size (bytes)483,258,240124,058,880
Size460.9 MB 118.3 MB
Events in quadrant A3,880,795812,739
Events in quadrant B4,352,106859,989
Events in quadrant C4,241,587766,272
Events in quadrant D4,748,164722,492

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0179292
B0193232
C0190462
D0201712

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8564590.688930%
B85652242.615295%
C85651311.529480%
D85641441.681457%

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 8739 8566 4 4 0.05% 0.05%
B 8740 8567 69 69 0.79% 0.81%
C 8740 8567 48 48 0.55% 0.56%
D 8739 8566 71 71 0.81% 0.83%

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 3 14 49878 207.13 954 930 236.3
A 4 3 26489 108.16 954 930 236.3
A 13 248 21258 86.02 954 930 236.3
B 5 185 296849 1465.0 933 897 202.0
B 10 247 100240 491.76 933 897 202.0
B 5 236 96042 470.98 933 897 202.0
C 4 5 161062 642.69 921 914 249.2
C 12 252 147441 588.03 921 914 249.2
C 15 209 140698 560.97 921 914 249.2
D 10 181 265978 1015.48 924 886 261.1
D 15 42 128155 487.52 924 886 261.1
D 3 12 123385 469.25 924 886 261.1

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