ASTROSAT CZTI

Data Quality Report

Orbit 57739

Creation date: 2026-05-31T03:29:35.311485
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_57739cztM0_level2.fits modeM0/AS1A14_083T16_9000006580_57739cztM0_level2_quad_clean.evt
Size (bytes)460,238,40096,255,360
Size438.9 MB 91.8 MB
Events in quadrant A3,282,803644,154
Events in quadrant B4,722,451659,668
Events in quadrant C4,882,473579,688
Events in quadrant D3,637,207571,589

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0144798
B0187372
C0190922
D0156255

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6585490.744115%
B65882814.265331%
C65884026.102004%
D6586991.503189%

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 7568 6588 40 40 0.53% 0.61%
B 7568 6588 130 130 1.72% 1.97%
C 7568 6589 357 357 4.72% 5.42%
D 7567 6588 82 82 1.08% 1.24%

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 7 160 266391 1518.67 707 689 175.0
A 0 12 213516 1216.45 707 689 175.0
A 3 128 32019 179.07 707 689 175.0
B 4 80 1120016 7569.37 686 659 147.9
B 10 16 404570 2731.35 686 659 147.9
B 5 185 124564 837.88 686 659 147.9
C 15 224 1872544 10256.15 665 658 182.5
C 9 38 114675 624.7 665 658 182.5
C 12 249 100672 547.98 665 658 182.5
D 9 49 323031 1678.13 675 643 192.1
D 2 31 211383 1096.96 675 643 192.1
D 2 249 133932 693.81 675 643 192.1

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