ASTROSAT CZTI

Data Quality Report

Orbit 37955

Creation date: 2024-06-27T21:46:36.836665
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/AS1A11_082T01_9000005356_37955cztM0_level2.evt modeM0/AS1A11_082T01_9000005356_37955cztM0_level2_quad_clean.evt
Size (bytes)474,154,56080,101,440
Size452.2 MB 76.4 MB
Events in quadrant A2,877,348533,500
Events in quadrant B4,111,805510,127
Events in quadrant C3,347,583527,388
Events in quadrant D3,689,253509,001

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0115133
B0151392
C0128072
D0140972

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0980
B0980
C0980
D0980

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0250
B0250
C0250
D0260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4930160.324544%
B493056011.359026%
C49303056.186613%
D49302204.462475%

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 7054 4931 7 7 0.10% 0.14%
B 7054 4931 437 437 6.20% 8.86%
C 7054 4931 256 256 3.63% 5.19%
D 7054 4931 181 181 2.57% 3.67%

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 10 83 337527 2744.48 620 610 122.8
A 15 222 108863 881.81 620 610 122.8
A 12 189 14438 112.64 620 610 122.8
B 5 172 1483003 13291.07 589 574 111.5
B 5 184 308539 2761.13 589 574 111.5
B 12 111 12850 110.06 589 574 111.5
C 14 254 695949 5218.42 587 593 133.3
C 15 214 216353 1619.21 587 593 133.3
C 0 10 138362 1033.91 587 593 133.3
D 12 227 360077 2500.42 599 583 143.8
D 1 52 357896 2485.25 599 583 143.8
D 10 199 178148 1235.03 599 583 143.8

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