ASTROSAT CZTI

Data Quality Report

Orbit 40876

Creation date: 2024-06-27T22:21:38.756180
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/AS1A12_097T01_9000005574_40876cztM0_level2.fits modeM0/AS1A12_097T01_9000005574_40876cztM0_level2_quad_clean.evt
Size (bytes)331,721,28089,328,960
Size316.4 MB 85.2 MB
Events in quadrant A2,955,005592,742
Events in quadrant B2,524,390613,245
Events in quadrant C2,540,990587,067
Events in quadrant D3,834,379530,673

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01100
B01100
C01100
D01100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121632
B0113941
C0110471
D0152011

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5448100.183554%
B5448390.715859%
C544850.091777%
D54481432.624816%

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 7150 5449 2 2 0.03% 0.04%
B 7150 5449 24 24 0.34% 0.44%
C 7150 5449 2 2 0.03% 0.04%
D 7150 5449 121 121 1.69% 2.22%

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 515069 4172.54 591 579 123.3
A 13 248 88218 710.76 591 579 123.3
A 2 79 40939 327.32 591 579 123.3
B 15 85 97736 845.59 591 575 114.9
B 5 255 63355 546.37 591 575 114.9
B 0 229 19059 160.87 591 575 114.9
C 15 214 229516 1658.66 581 583 138.0
C 0 10 23917 169.06 581 583 138.0
C 12 249 17235 120.65 581 583 138.0
D 12 79 628305 4397.07 575 557 142.8
D 1 47 285539 1996.16 575 557 142.8
D 2 249 275491 1925.78 575 557 142.8

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