ASTROSAT CZTI

Data Quality Report

Orbit 35122

Creation date: 2022-03-28T20:06:37.870724
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/AS1A11_047T09_9000005028_35122cztM0_level2.evt modeM0/AS1A11_047T09_9000005028_35122cztM0_level2_quad_clean.evt
Size (bytes)728,533,44076,320,000
Size694.8 MB 72.8 MB
Events in quadrant A9,121,785406,872
Events in quadrant B3,305,636507,995
Events in quadrant C3,363,195500,167
Events in quadrant D5,857,731465,694

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0280
B0280
C0280
D0280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0311893
B0137762
C0137152
D0217242

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6149255041.470158%
B6149751.219711%
C6149540.878192%
D61491973.203773%

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 8986 6151 2062 2062 22.95% 33.52%
B 8986 6151 45 45 0.50% 0.73%
C 8986 6151 34 34 0.38% 0.55%
D 8986 6151 157 157 1.75% 2.55%

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 6879937 60650.56 556 545 113.4
A 10 83 73046 639.19 556 545 113.4
A 13 6 14322 121.46 556 545 113.4
B 5 172 226472 1613.75 719 698 139.9
B 5 255 81249 575.75 719 698 139.9
B 0 155 46816 329.64 719 698 139.9
C 15 214 259675 1571.96 707 714 164.7
C 0 10 188803 1141.75 707 714 164.7
C 14 67 80674 485.38 707 714 164.7
D 8 195 2596616 14991.27 701 681 173.2
D 2 250 139716 802.91 701 681 173.2
D 7 80 134234 771.25 701 681 173.2

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