ASTROSAT CZTI

Data Quality Report

Orbit 00846

Creation date: 2024-06-27T14:03:44.569438
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_156T01_9000000118_00846cztM0_level2.evt modeM0/AS1P01_156T01_9000000118_00846cztM0_level2_quad_clean.evt
Size (bytes)1,089,748,80065,761,920
Size1.0 GB 62.7 MB
Events in quadrant A7,817,108393,117
Events in quadrant B8,715,369385,674
Events in quadrant C7,607,958389,586
Events in quadrant D8,436,331373,268

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0277920
B0304950
C0271600
D0296160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6441380.589971%
B64411993.089582%
C6441340.527868%
D64411692.623816%

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 6881 6442 215 215 3.12% 3.34%
B 6881 6442 503 503 7.31% 7.81%
C 6881 6442 177 177 2.57% 2.75%
D 6881 6442 750 750 10.90% 11.64%

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 11 79 7213 10.43 2033 2049 494.9
A 7 16 6738 9.47 2033 2049 494.9
A 3 111 6352 8.69 2033 2049 494.9
B 8 234 312039 629.96 2079 2093 492.0
B 5 65 200354 402.96 2079 2093 492.0
B 0 220 65727 129.33 2079 2093 492.0
C 5 234 39916 70.77 1915 1988 535.9
C 15 241 29866 52.02 1915 1988 535.9
C 3 111 27619 47.82 1915 1988 535.9
D 7 207 1270874 2172.59 1868 1935 584.1
D 1 4 88304 147.88 1868 1935 584.1
D 13 200 77804 129.9 1868 1935 584.1

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