ASTROSAT CZTI

Data Quality Report

Orbit 12687

Creation date: 2024-06-27T16:31:03.789902
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/AS1A04_174T01_9000001876_12687cztM0_level2.evt modeM0/AS1A04_174T01_9000001876_12687cztM0_level2_quad_clean.evt
Size (bytes)1,006,292,160153,840,960
Size959.7 MB 146.7 MB
Events in quadrant A6,151,674982,139
Events in quadrant B9,899,047866,944
Events in quadrant C6,142,638985,619
Events in quadrant D7,405,202927,863

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0170

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0266134
B0376663
C0268863
D0308843

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02620
B02620
C02620
D02620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A129691501.156604%
B12969152711.774231%
C129691190.917573%
D129694233.261624%

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 14198 12969 1 1 0.01% 0.01%
B 14199 12969 1150 1150 8.10% 8.87%
C 14198 12968 14 14 0.10% 0.11%
D 14198 12968 305 305 2.15% 2.35%

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 12 189 90807 280.39 1569 1535 318.4
A 8 15 16525 47.08 1569 1535 318.4
A 0 226 13996 39.14 1569 1535 318.4
B 4 239 3788031 13355.76 1479 1444 283.5
B 11 51 159878 558.82 1479 1444 283.5
B 0 214 38002 128.94 1479 1444 283.5
C 15 208 157131 438.73 1530 1545 354.6
C 14 234 18956 49.1 1530 1545 354.6
C 13 61 11248 27.36 1530 1545 354.6
D 1 52 1434203 4035.28 1493 1462 355.1
D 10 199 124313 346.01 1493 1462 355.1
D 10 157 54430 149.18 1493 1462 355.1

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