ASTROSAT CZTI

Data Quality Report

Orbit 51440

Creation date: 2025-04-02T12:19:17.024684
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/AS1A13_090T01_9000006458_51440cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51440cztM0_level2_quad_clean.evt
Size (bytes)758,352,96093,562,560
Size723.2 MB 89.2 MB
Events in quadrant A7,319,678629,396
Events in quadrant B3,898,008730,638
Events in quadrant C11,373,335381,294
Events in quadrant D4,926,104592,754

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0267372
B0166222
C0386582
D0197492

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71626489.047752%
B71611251.745566%
C7161327145.677978%
D71613154.398827%

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 7697 7162 491 491 6.38% 6.86%
B 7696 7162 55 55 0.71% 0.77%
C 7696 7162 3035 3035 39.44% 42.38%
D 7696 7162 334 334 4.34% 4.66%

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 3 2410148 13164.53 741 721 183.0
A 7 64 480558 2621.71 741 721 183.0
A 12 250 475001 2591.35 741 721 183.0
B 15 52 193231 1175.3 764 736 163.8
B 5 185 78584 475.31 764 736 163.8
B 4 170 60980 367.83 764 736 163.8
C 4 12 4586082 29621.24 558 553 154.8
C 0 176 2174664 14044.15 558 553 154.8
C 15 179 1430503 9237.08 558 553 154.8
D 3 12 533946 2609.41 729 701 204.4
D 6 42 407555 1990.92 729 701 204.4
D 15 234 253614 1237.62 729 701 204.4

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