ASTROSAT CZTI

Data Quality Report

Orbit 51957

Creation date: 2025-05-07T00:21:19.134843
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/AS1C09_011T06_9000006468_51957cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51957cztM0_level2_quad_clean.evt
Size (bytes)835,948,80076,006,080
Size797.2 MB 72.5 MB
Events in quadrant A8,554,035442,393
Events in quadrant B4,465,055588,642
Events in quadrant C8,706,257420,721
Events in quadrant D8,735,152412,455

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0297721
B0176871
C0302091
D0303181

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6257191930.669650%
B62575608.949976%
C6257207033.082947%
D6258167526.765740%

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 7287 6258 1400 1400 19.21% 22.37%
B 7287 6258 372 372 5.10% 5.94%
C 7287 6258 1601 1601 21.97% 25.58%
D 7288 6259 1612 1612 22.12% 25.75%

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 7 174 3314465 23680.6 554 539 139.9
A 7 64 1504812 10749.21 554 539 139.9
A 12 3 235377 1678.1 554 539 139.9
B 10 41 1177190 8768.04 628 607 134.2
B 4 170 92320 683.46 628 607 134.2
B 0 216 85850 635.24 628 607 134.2
C 15 224 5348758 35314.0 542 534 151.4
C 4 5 388619 2562.5 542 534 151.4
C 13 3 299418 1973.51 542 534 151.4
D 6 42 2043267 12704.74 562 536 160.8
D 12 16 1675474 10417.26 562 536 160.8
D 2 172 900002 5594.22 562 536 160.8

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