ASTROSAT CZTI

Data Quality Report

Orbit 51511

Creation date: 2025-04-07T00:13:17.347296
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_51511cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51511cztM0_level2_quad_clean.evt
Size (bytes)716,221,44085,993,920
Size683.0 MB 82.0 MB
Events in quadrant A5,288,824586,719
Events in quadrant B3,963,464683,591
Events in quadrant C3,996,760602,240
Events in quadrant D12,749,422269,489

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0201412
B0162032
C0164612
D0424512

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A662366310.010569%
B66232373.578439%
C66232473.729428%
D6623375556.696361%

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 7673 6624 436 436 5.68% 6.58%
B 7673 6624 49 49 0.64% 0.74%
C 7673 6624 183 183 2.38% 2.76%
D 7673 6624 3748 3748 48.85% 56.58%

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 702387 4149.85 696 679 169.1
A 8 43 505758 2987.0 696 679 169.1
A 7 235 246023 1450.95 696 679 169.1
B 0 171 208042 1330.46 732 706 155.8
B 5 185 164045 1048.13 732 706 155.8
B 15 52 130746 834.45 732 706 155.8
C 13 3 366697 1858.0 713 709 197.0
C 12 252 212253 1073.94 713 709 197.0
C 14 245 165062 834.37 713 709 197.0
D 8 176 9736266 72117.58 482 463 135.0
D 3 12 350493 2592.83 482 463 135.0
D 8 192 325806 2409.97 482 463 135.0

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