ASTROSAT CZTI

Data Quality Report

Orbit 20200425_A07_018T08_9000003622_level2

Creation date: 2020-04-29T10:41:37.943178
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

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/AS1A07_018T08_9000003622cztM0_level2_bc.evt modeM0/AS1A07_018T08_9000003622cztM0_level2_quad_clean.evt
Size (bytes)3,890,399,0401,240,456,320
Size3.6 GB 1.2 GB
Events in quadrant A20,388,8087,934,538
Events in quadrant B22,958,4067,967,480
Events in quadrant C31,931,7847,518,866
Events in quadrant D35,936,6167,501,041

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019780
B019780
C019780
D019780

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02005870
B02113950
C02406350
D02520590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9702411271.161568%
B9702420582.121125%
C9702455015.669731%
D9702431263.221883%

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 110728 97025 3 3 0.00% 0.00%
B 110728 97022 40 40 0.04% 0.04%
C 110728 97022 1215 1215 1.10% 1.25%
D 110728 97021 458 458 0.41% 0.47%

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 13 254 157995 136.05 5225 5138 1123.5
A 12 96 153667 132.2 5225 5138 1123.5
A 0 226 33423 25.18 5225 5138 1123.5
B 3 64 981110 995.53 5210 5085 980.4
B 0 189 460459 464.47 5210 5085 980.4
B 0 190 445045 448.75 5210 5085 980.4
C 7 247 11683663 10234.25 4885 4864 1141.1
C 10 91 678024 589.9 4885 4864 1141.1
C 2 16 483079 419.06 4885 4864 1141.1
D 1 52 8226119 7003.72 5064 4881 1173.8
D 8 195 6006658 5112.95 5064 4881 1173.8
D 12 233 816904 691.77 5064 4881 1173.8

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