ASTROSAT CZTI

Data Quality Report

Orbit 51820

Creation date: 2025-04-27T21:18:39.316824
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_9000006464_51820cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51820cztM0_level2_quad_clean.evt
Size (bytes)822,623,040106,997,760
Size784.5 MB 102.0 MB
Events in quadrant A7,112,351665,962
Events in quadrant B7,609,863729,530
Events in quadrant C6,575,572706,136
Events in quadrant D8,537,029583,318

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0264690
B0280730
C0251310
D0308793

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A797591111.423197%
B7976101612.738215%
C79762733.422768%
D7975127916.037618%

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 7975 7975 766 766 9.61% 9.61%
B 7976 7976 641 641 8.04% 8.04%
C 7976 7976 189 189 2.37% 2.37%
D 7975 7975 1016 1016 12.74% 12.74%

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 15 174 1937789 9514.03 828 807 203.6
A 12 3 528629 2592.55 828 807 203.6
A 3 14 384277 1883.52 828 807 203.6
B 10 128 2164887 12065.5 829 798 179.4
B 1 223 822712 4582.44 829 798 179.4
B 5 32 394767 2196.51 829 798 179.4
C 15 192 784324 3404.34 841 834 230.1
C 10 252 650311 2822.04 841 834 230.1
C 9 38 436359 1892.4 841 834 230.1
D 11 129 2926030 13509.51 785 761 216.5
D 3 12 816576 3767.61 785 761 216.5
D 12 6 620812 2863.53 785 761 216.5

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