ASTROSAT CZTI

Data Quality Report

Orbit 51494

Creation date: 2025-04-05T20:22:32.095416
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_51494cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51494cztM0_level2_quad_clean.evt
Size (bytes)809,133,12089,055,360
Size771.6 MB 84.9 MB
Events in quadrant A5,228,283630,314
Events in quadrant B7,312,140579,783
Events in quadrant C5,940,250591,991
Events in quadrant D10,952,382425,847

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0198951
B0264211
C0223971
D0372481

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67104546.766021%
B6711145621.695723%
C67116579.789897%
D6711233234.748920%

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 7770 6710 258 258 3.32% 3.85%
B 7771 6711 884 884 11.38% 13.17%
C 7771 6711 610 610 7.85% 9.09%
D 7771 6711 2331 2331 30.00% 34.73%

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 12 250 1336628 7426.6 737 719 179.9
A 12 3 206540 1144.2 737 719 179.9
A 8 43 133649 738.99 737 719 179.9
B 4 81 3816478 25670.57 694 670 148.6
B 8 234 277106 1859.7 694 670 148.6
B 5 185 66770 444.68 694 670 148.6
C 9 38 2608351 13317.24 712 707 195.8
C 13 3 96549 489.47 712 707 195.8
C 15 215 77327 391.3 712 707 195.8
D 8 176 5304523 30475.07 627 604 174.0
D 11 176 2575665 14795.7 627 604 174.0
D 1 3 140913 806.18 627 604 174.0

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