ASTROSAT CZTI

Data Quality Report

Orbit 55751

Creation date: 2026-01-17T11:50:00.282852
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_099T04_9000006540_55751cztM0_level2.fits modeM0/AS1A14_099T04_9000006540_55751cztM0_level2_quad_clean.evt
Size (bytes)656,210,88090,302,400
Size625.8 MB 86.1 MB
Events in quadrant A7,143,611577,786
Events in quadrant B7,365,793575,675
Events in quadrant C3,373,058630,238
Events in quadrant D5,903,510496,434

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257862
B0264242
C0147502
D0223653

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A651285213.083538%
B6512142121.821253%
C6512891.366708%
D6512107616.523342%

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 7726 6513 774 774 10.02% 11.88%
B 7727 6514 1013 1013 13.11% 15.55%
C 7727 6514 58 58 0.75% 0.89%
D 7727 6514 1018 1018 13.17% 15.63%

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 2470371 14756.8 679 664 167.4
A 15 32 1456170 8696.83 679 664 167.4
A 7 64 285627 1702.69 679 664 167.4
B 2 249 4430371 32157.9 640 618 137.8
B 4 206 213100 1542.52 640 618 137.8
B 7 0 109818 792.74 640 618 137.8
C 15 199 481534 2520.76 691 684 190.8
C 12 252 57640 298.58 691 684 190.8
C 12 250 48917 252.85 691 684 190.8
D 11 129 3168388 17703.92 624 596 178.9
D 3 12 161352 898.42 624 596 178.9
D 7 129 59546 329.45 624 596 178.9

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