ASTROSAT CZTI

Data Quality Report

Orbit 35481

Creation date: 2022-04-21T12:03:26.318298
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/AS1T04_095T01_9000005080_35481cztM0_level2.evt modeM0/AS1T04_095T01_9000005080_35481cztM0_level2_quad_clean.evt
Size (bytes)529,303,68093,326,400
Size504.8 MB 89.0 MB
Events in quadrant A2,662,090664,241
Events in quadrant B2,733,328675,363
Events in quadrant C7,320,981499,005
Events in quadrant D2,973,986635,847

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0109993
B0112782
C0253262
D0119782

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0330
B0330
C0330
D0340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01020
B01020
C01020
D01020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5010500.998004%
B5010641.277445%
C5010172434.411178%
D50101022.035928%

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 7103 5011 56 56 0.79% 1.12%
B 7103 5011 34 34 0.48% 0.68%
C 7103 5011 1466 1466 20.64% 29.26%
D 7103 5011 90 90 1.27% 1.80%

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 15 169 234293 1973.47 592 579 118.4
A 10 83 130857 1100.06 592 579 118.4
A 13 254 8385 65.91 592 579 118.4
B 5 172 202153 1826.06 586 571 110.4
B 4 232 75461 678.4 586 571 110.4
B 5 236 73509 660.72 586 571 110.4
C 4 254 4943738 46464.82 459 462 106.4
C 0 10 257747 2418.38 459 462 106.4
C 15 214 167778 1572.7 459 462 106.4
D 13 249 282704 2018.23 583 568 139.8
D 8 195 140481 1000.85 583 568 139.8
D 7 80 93010 661.28 583 568 139.8

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