ASTROSAT CZTI

Data Quality Report

Orbit 40908

Creation date: 2024-06-27T22:22:03.223606
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_102T01_9000005576_40908cztM0_level2.fits modeM0/AS1A12_102T01_9000005576_40908cztM0_level2_quad_clean.evt
Size (bytes)378,869,76091,895,040
Size361.3 MB 87.6 MB
Events in quadrant A2,955,783635,139
Events in quadrant B3,591,209616,971
Events in quadrant C2,747,655618,638
Events in quadrant D4,318,665542,295

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0121313
B0142622
C0113452
D0164482

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5283370.700360%
B52833486.587166%
C5283350.662502%
D52833696.984668%

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 7225 5284 12 12 0.17% 0.23%
B 7225 5284 263 263 3.64% 4.98%
C 7225 5284 29 29 0.40% 0.55%
D 7225 5284 400 400 5.54% 7.57%

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 538120 4379.1 603 591 122.7
A 7 3 66720 538.73 603 591 122.7
A 13 254 8955 68.14 603 591 122.7
B 5 32 524152 4714.46 583 567 111.1
B 4 171 382104 3435.43 583 567 111.1
B 5 255 268753 2414.8 583 567 111.1
C 15 214 223992 1641.49 594 598 136.1
C 14 254 102845 751.31 594 598 136.1
C 0 10 80008 583.5 594 598 136.1
D 2 153 773268 5518.33 579 564 140.0
D 12 128 343018 2445.67 579 564 140.0
D 12 79 309293 2204.82 579 564 140.0

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