ASTROSAT CZTI

Data Quality Report

Orbit 51787

Creation date: 2025-04-25T14:09:56.937758
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_51787cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51787cztM0_level2_quad_clean.evt
Size (bytes)618,456,96082,028,160
Size589.8 MB 78.2 MB
Events in quadrant A5,361,890565,357
Events in quadrant B6,921,636473,318
Events in quadrant C4,138,681547,058
Events in quadrant D6,000,603473,875

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201091
B0247781
C0164451
D0219551

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A60712614.299127%
B6071162826.816011%
C60713055.023884%
D607184113.852743%

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 7071 6072 127 127 1.80% 2.09%
B 7070 6071 1470 1470 20.79% 24.21%
C 7071 6072 223 223 3.15% 3.67%
D 7071 6071 752 752 10.63% 12.39%

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 1408989 8751.99 658 644 160.9
A 15 174 249361 1545.62 658 644 160.9
A 11 14 193692 1199.67 658 644 160.9
B 10 128 3485626 30501.73 530 512 114.3
B 10 44 601468 5259.57 530 512 114.3
B 4 206 193540 1689.38 530 512 114.3
C 13 3 387478 2206.58 641 636 175.3
C 15 218 272404 1550.19 641 636 175.3
C 12 254 212361 1207.7 641 636 175.3
D 11 129 2805605 16375.86 616 594 171.3
D 3 12 434566 2533.56 616 594 171.3
D 8 176 87913 509.77 616 594 171.3

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