ASTROSAT CZTI

Data Quality Report

Orbit 18835

Creation date: 2024-06-27T17:55:26.820982
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/AS1A05_173T01_9000002812_18835cztM0_level2.evt modeM0/AS1A05_173T01_9000002812_18835cztM0_level2_quad_clean.evt
Size (bytes)541,428,48072,319,680
Size516.3 MB 69.0 MB
Events in quadrant A3,509,217435,267
Events in quadrant B3,678,657439,354
Events in quadrant C3,532,616421,678
Events in quadrant D5,192,100395,934

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0148441
B0152411
C0149061
D0201011

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7145901.259622%
B71461181.651273%
C71461452.029107%
D71463785.289673%

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 7490 7146 1 1 0.01% 0.01%
B 7491 7147 9 9 0.12% 0.13%
C 7491 7147 5 5 0.07% 0.07%
D 7491 7147 258 258 3.44% 3.61%

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 9 143 12451 63.15 899 880 183.2
A 8 144 11521 58.08 899 880 183.2
A 13 254 11482 57.86 899 880 183.2
B 0 229 49069 277.89 894 871 173.4
B 4 216 30612 171.47 894 871 173.4
B 0 198 22601 125.29 894 871 173.4
C 14 238 130250 639.79 855 863 202.2
C 0 207 50549 245.69 855 863 202.2
C 3 233 10162 45.98 855 863 202.2
D 7 238 1368827 6453.04 859 835 212.0
D 1 52 350550 1649.66 859 835 212.0
D 7 38 107441 502.88 859 835 212.0

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