ASTROSAT CZTI

Data Quality Report

Orbit 00853

Creation date: 2024-06-27T14:03:50.277636
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_9000000120_00853cztM0_level2.evt modeM0/AS1P01_165T02_9000000120_00853cztM0_level2_quad_clean.evt
Size (bytes)938,589,12061,352,640
Size895.1 MB 58.5 MB
Events in quadrant A6,915,691369,741
Events in quadrant B7,637,936366,648
Events in quadrant C6,908,375363,210
Events in quadrant D6,582,792357,000

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245760
B0267750
C0246120
D0236770

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5730250.436300%
B5730601.047120%
C5730460.802792%
D5729861.501135%

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 7055 5730 193 193 2.74% 3.37%
B 7055 5730 352 352 4.99% 6.14%
C 7055 5730 189 189 2.68% 3.30%
D 7054 5730 244 244 3.46% 4.26%

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 7723 13.8 1798 1817 428.0
A 15 17 6922 11.93 1798 1817 428.0
A 11 79 6684 11.37 1798 1817 428.0
B 8 38 204166 461.02 1885 1901 438.7
B 0 184 52223 114.7 1885 1901 438.7
B 3 204 51161 112.28 1885 1901 438.7
C 9 83 68491 139.26 1730 1799 478.9
C 15 241 23444 45.2 1730 1799 478.9
C 3 111 20887 39.86 1730 1799 478.9
D 1 4 170589 350.81 1681 1715 481.4
D 2 16 42619 84.97 1681 1715 481.4
D 10 85 21052 40.17 1681 1715 481.4

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