ASTROSAT CZTI

Data Quality Report

Orbit 35787

Creation date: 2022-05-12T12:28:41.221509
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/AS1A09_029T09_9000005138_35787cztM0_level2.evt modeM0/AS1A09_029T09_9000005138_35787cztM0_level2_quad_clean.evt
Size (bytes)439,813,44071,824,320
Size419.4 MB 68.5 MB
Events in quadrant A2,673,379459,124
Events in quadrant B3,509,678457,271
Events in quadrant C3,065,480443,935
Events in quadrant D3,694,614426,721

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01120
B01120
C01120
D01120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0115743
B0139652
C0125212
D0148652

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0300
B0300
C0300
D0310

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5544230.414863%
B55441482.669553%
C55441332.398990%
D55441883.391053%

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 7068 5545 12 12 0.17% 0.22%
B 7068 5545 111 111 1.57% 2.00%
C 7068 5545 130 130 1.84% 2.34%
D 7068 5545 177 177 2.50% 3.19%

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 162483 1268.5 628 616 127.6
A 15 237 52721 408.33 628 616 127.6
A 13 6 11012 81.47 628 616 127.6
B 5 255 382809 3215.07 620 604 118.9
B 5 172 198642 1665.88 620 604 118.9
B 4 171 90021 752.17 620 604 118.9
C 0 10 321656 2302.73 599 602 139.4
C 15 214 230299 1647.48 599 602 139.4
C 0 207 98961 705.47 599 602 139.4
D 13 249 388434 2605.12 602 587 148.9
D 14 52 376813 2527.07 602 587 148.9
D 8 195 277301 1858.66 602 587 148.9

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