ASTROSAT CZTI

Data Quality Report

Orbit 55638

Creation date: 2026-01-13T14:16:53.553982
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_021T06_9000006538_55638cztM0_level2.fits modeM0/AS1A14_021T06_9000006538_55638cztM0_level2_quad_clean.evt
Size (bytes)509,114,88098,398,080
Size485.5 MB 93.8 MB
Events in quadrant A3,998,199644,401
Events in quadrant B3,214,954707,982
Events in quadrant C3,869,018611,701
Events in quadrant D7,205,156514,789

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0172032
B0152123
C0171562
D0263862

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71792944.095278%
B71781982.758429%
C71792954.109207%
D7179117416.353253%

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 7494 7179 44 44 0.59% 0.61%
B 7493 7178 18 18 0.24% 0.25%
C 7494 7180 184 184 2.46% 2.56%
D 7494 7179 1037 1037 13.84% 14.44%

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 12 115 516600 2825.79 749 729 182.6
A 0 8 245721 1341.99 749 729 182.6
A 8 249 229977 1255.75 749 729 182.6
B 1 159 106776 667.88 739 709 158.8
B 7 252 33431 206.04 739 709 158.8
B 10 247 24058 147.02 739 709 158.8
C 13 3 608106 3104.31 720 710 195.7
C 9 38 152392 775.22 720 710 195.7
C 10 19 117601 597.41 720 710 195.7
D 11 129 2925108 14880.2 690 659 196.5
D 2 31 365306 1855.4 690 659 196.5
D 8 160 364678 1852.2 690 659 196.5

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