ASTROSAT CZTI

Data Quality Report

Orbit 35218

Creation date: 2022-04-03T16:57:21.012071
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/AS1C07_004T01_9000005052_35218cztM0_level2.evt modeM0/AS1C07_004T01_9000005052_35218cztM0_level2_quad_clean.evt
Size (bytes)634,959,36098,533,440
Size605.5 MB 94.0 MB
Events in quadrant A3,275,981689,785
Events in quadrant B7,132,372600,951
Events in quadrant C2,978,861698,777
Events in quadrant D5,506,788644,926

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128263
B0246992
C0119972
D0199712

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01040
C01040
D01040

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A49671863.744715%
B4967167233.662170%
C4967581.167707%
D49673557.147171%

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 7030 4968 140 140 1.99% 2.82%
B 7030 4968 1127 1127 16.03% 22.69%
C 7030 4968 32 32 0.46% 0.64%
D 7030 4968 339 339 4.82% 6.82%

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 15 174 594017 4534.65 656 647 130.9
A 10 83 78759 596.95 656 647 130.9
A 8 144 21677 160.72 656 647 130.9
B 5 236 4437322 41089.09 574 560 108.0
B 5 172 145460 1341.93 574 560 108.0
B 5 200 142241 1312.12 574 560 108.0
C 15 214 213728 1471.91 636 643 144.8
C 0 10 172541 1187.41 636 643 144.8
C 0 207 64987 444.47 636 643 144.8
D 8 195 2227618 14455.26 633 617 154.1
D 10 118 262758 1701.53 633 617 154.1
D 13 249 150054 969.98 633 617 154.1

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