ASTROSAT CZTI

Data Quality Report

Orbit 24974

Creation date: 2024-06-27T19:12:11.004050
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/AS1A08_003T17_9000003656_24974cztM0_level2.evt modeM0/AS1A08_003T17_9000003656_24974cztM0_level2_quad_clean.evt
Size (bytes)632,076,48091,215,360
Size602.8 MB 87.0 MB
Events in quadrant A4,249,668555,189
Events in quadrant B4,891,126551,634
Events in quadrant C4,397,864533,209
Events in quadrant D5,017,587522,286

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0181173
B0199403
C0184733
D0205943

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01780
B01780
C01780
D01780

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A86333964.587050%
B86336016.961659%
C86334154.807135%
D86344094.737086%

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 8878 8636 4 4 0.05% 0.05%
B 8878 8636 100 100 1.13% 1.16%
C 8878 8636 1 1 0.01% 0.01%
D 8879 8637 91 91 1.02% 1.05%

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 6 16 23763 101.41 1096 1069 223.8
A 13 254 12605 51.55 1096 1069 223.8
A 3 137 10592 42.55 1096 1069 223.8
B 3 64 379712 1783.34 1079 1049 212.3
B 10 246 159703 747.19 1079 1049 212.3
B 15 32 65519 303.63 1079 1049 212.3
C 14 238 163876 652.38 1048 1049 249.6
C 7 247 134113 533.13 1048 1049 249.6
C 3 233 7556 26.07 1048 1049 249.6
D 8 195 311934 1187.93 1059 1026 261.7
D 7 238 289569 1102.47 1059 1026 261.7
D 1 52 289318 1101.52 1059 1026 261.7

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