ASTROSAT CZTI

Data Quality Report

Orbit 51455

Creation date: 2025-04-03T06:09:53.069533
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_51455cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51455cztM0_level2_quad_clean.evt
Size (bytes)766,134,720108,054,720
Size730.6 MB 103.0 MB
Events in quadrant A9,119,361655,658
Events in quadrant B4,817,882783,300
Events in quadrant C6,738,077649,561
Events in quadrant D7,067,024628,256

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0327272
B0200832
C0258402
D0266172

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7978133316.708448%
B79794585.740068%
C7979100212.557965%
D797980710.114049%

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 8968 7981 934 934 10.41% 11.70%
B 8969 7982 205 205 2.29% 2.57%
C 8969 7982 838 838 9.34% 10.50%
D 8969 7982 738 738 8.23% 9.25%

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 64 2497551 12378.74 818 794 201.7
A 12 3 2220481 11005.05 818 794 201.7
A 12 194 264551 1307.69 818 794 201.7
B 15 52 331515 1783.76 864 832 185.4
B 5 185 305169 1641.65 864 832 185.4
B 4 206 144749 776.31 864 832 185.4
C 15 179 2492160 11090.61 818 808 224.6
C 4 12 355546 1579.17 818 808 224.6
C 13 3 331898 1473.89 818 808 224.6
D 3 12 1415753 6187.8 817 787 228.7
D 11 176 883566 3860.49 817 787 228.7
D 8 176 784353 3426.62 817 787 228.7

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