ASTROSAT CZTI

Data Quality Report

Orbit 51948

Creation date: 2025-05-06T11:29:07.200336
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_51948cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51948cztM0_level2_quad_clean.evt
Size (bytes)899,081,28078,022,080
Size857.4 MB 74.4 MB
Events in quadrant A7,558,757499,797
Events in quadrant B3,982,856655,099
Events in quadrant C9,066,428439,993
Events in quadrant D12,154,035298,710

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0271861
B0166901
C0316541
D0407817

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6710147521.982116%
B67102353.502235%
C6711213931.873044%
D6710348751.967213%

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 7230 6711 1280 1280 17.70% 19.07%
B 7230 6711 108 108 1.49% 1.61%
C 7231 6711 1703 1703 23.55% 25.38%
D 7230 6711 3062 3062 42.35% 45.63%

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 4 159 3057518 19454.28 611 595 157.1
A 7 64 1133318 7208.66 611 595 157.1
A 13 248 170196 1079.34 611 595 157.1
B 8 3 158471 1109.8 672 650 142.2
B 4 171 141958 993.68 672 650 142.2
B 10 254 139809 978.57 672 650 142.2
C 15 224 6144989 39127.85 561 554 157.0
C 13 3 203671 1293.45 561 554 157.0
C 15 147 134158 850.79 561 554 157.0
D 12 17 5129364 37477.36 473 450 136.9
D 6 42 2522686 18430.17 473 450 136.9
D 12 16 1588681 11605.32 473 450 136.9

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