ASTROSAT CZTI

Data Quality Report

Orbit 00841

Creation date: 2024-06-27T14:03:40.778811
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/AS1P01_165T02_9000000116_00841cztM0_level2.evt modeM0/AS1P01_165T02_9000000116_00841cztM0_level2_quad_clean.evt
Size (bytes)1,382,281,92074,972,160
Size1.3 GB 71.5 MB
Events in quadrant A18,230,238369,779
Events in quadrant B8,488,486485,930
Events in quadrant C7,584,039481,017
Events in quadrant D7,128,967476,810

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0593780
B0298370
C0271910
D0258450

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6524396760.806254%
B6524140.214592%
C6524170.260576%
D6524300.459841%

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 7589 6524 5948 5948 78.38% 91.17%
B 7589 6525 397 397 5.23% 6.08%
C 7589 6525 229 229 3.02% 3.51%
D 7589 6525 225 225 2.96% 3.45%

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 15 127 12166961 32770.0 1548 1561 371.2
A 15 171 99805 264.64 1548 1561 371.2
A 15 233 11118 25.74 1548 1561 371.2
B 8 38 142169 283.97 2108 2118 493.2
B 0 220 117838 234.64 2108 2118 493.2
B 0 207 71082 139.83 2108 2118 493.2
C 3 111 23872 41.15 1918 1986 531.9
C 15 241 18146 30.38 1918 1986 531.9
C 9 83 17593 29.34 1918 1986 531.9
D 10 85 72699 124.58 1838 1899 568.3
D 12 22 62296 106.28 1838 1899 568.3
D 1 4 41774 70.17 1838 1899 568.3

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