ASTROSAT CZTI

Data Quality Report

Orbit 20838

Creation date: 2024-06-27T18:20:09.981640
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/AS1A06_009T03_9000003072_20838cztM0_level2.evt modeM0/AS1A06_009T03_9000003072_20838cztM0_level2_quad_clean.evt
Size (bytes)1,120,858,560165,729,600
Size1.0 GB 158.1 MB
Events in quadrant A6,795,1941,024,861
Events in quadrant B7,315,5661,028,449
Events in quadrant C6,986,4071,004,836
Events in quadrant D11,866,523957,524

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02960
B02960
C02960
D02960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298133
B0310853
C0300523
D0453074

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14531550.378501%
B145321350.928984%
C145321120.770713%
D145314863.344574%

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 16101 14534 4 4 0.02% 0.03%
B 16101 14534 38 38 0.24% 0.26%
C 16101 14534 12 12 0.07% 0.08%
D 16101 14533 299 299 1.86% 2.06%

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 5 16 59592 165.58 1741 1706 349.6
A 2 79 41347 113.39 1741 1706 349.6
A 0 226 15121 38.37 1741 1706 349.6
B 7 220 219939 658.18 1734 1688 331.6
B 3 64 106445 315.91 1734 1688 331.6
B 0 189 90650 268.28 1734 1688 331.6
C 14 238 262645 667.79 1673 1685 390.8
C 9 54 188206 477.3 1673 1685 390.8
C 13 61 12035 26.49 1673 1685 390.8
D 1 20 3939130 9702.71 1667 1617 405.8
D 1 52 861388 2118.62 1667 1617 405.8
D 9 1 591803 1454.32 1667 1617 405.8

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