ASTROSAT CZTI

Data Quality Report

Orbit 38870

Creation date: 2024-06-27T21:57:29.773855
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/AS1A12_077T06_9000005408_38870cztM0_level2.fits modeM0/AS1A12_077T06_9000005408_38870cztM0_level2_quad_clean.evt
Size (bytes)795,608,640153,368,640
Size758.8 MB 146.3 MB
Events in quadrant A5,936,3361,028,790
Events in quadrant B6,302,3911,091,784
Events in quadrant C4,392,8951,072,192
Events in quadrant D12,101,698807,919

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0430
B0430
C0430
D0440

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01900
B01900
C01900
D01900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0235904
B0248573
C0189103
D0424173

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A92705175.577131%
B92704034.347357%
C9270100.107875%
D9270197721.326861%

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 13307 9272 436 436 3.28% 4.70%
B 13307 9271 292 292 2.19% 3.15%
C 13307 9272 5 5 0.04% 0.05%
D 13307 9271 2050 2050 15.41% 22.11%

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 13 248 1351994 6670.9 1012 996 202.5
A 10 83 648247 3195.97 1012 996 202.5
A 13 254 14464 66.5 1012 996 202.5
B 4 251 1835336 9461.32 1020 991 193.9
B 4 171 346901 1784.16 1020 991 193.9
B 0 230 47289 238.8 1020 991 193.9
C 15 214 381125 1619.14 1011 1020 234.8
C 14 254 40425 167.85 1011 1020 234.8
C 0 10 24277 99.07 1011 1020 234.8
D 12 227 5691759 25447.32 922 899 223.6
D 2 250 2039735 9116.89 922 899 223.6
D 2 249 281580 1255.1 922 899 223.6

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