ASTROSAT CZTI

Data Quality Report

Orbit 34861

Creation date: 2022-03-10T14:47:18.228387
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_005T01_9000004992_34861cztM0_level2.evt modeM0/AS1C07_005T01_9000004992_34861cztM0_level2_quad_clean.evt
Size (bytes)1,192,426,56074,352,960
Size1.1 GB 70.9 MB
Events in quadrant A13,114,575368,012
Events in quadrant B14,931,670225,866
Events in quadrant C3,339,331642,484
Events in quadrant D4,342,150608,168

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0428623
B0482072
C0132822
D0168512

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5749499986.954253%
B5749573499.739085%
C57491131.965559%
D57501763.060870%

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 7121 5749 4625 4625 64.95% 80.45%
B 7121 5748 5612 5612 78.81% 97.63%
C 7122 5750 94 94 1.32% 1.63%
D 7123 5751 152 152 2.13% 2.64%

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 11313087 128491.33 434 425 88.0
A 15 237 67001 756.18 434 425 88.0
A 10 83 38091 427.82 434 425 88.0
B 5 31 5498224 111141.71 255 248 49.5
B 5 15 5306126 107258.44 255 248 49.5
B 5 14 2735014 55283.36 255 248 49.5
C 0 10 276891 1864.91 637 639 148.1
C 15 214 264274 1779.74 637 639 148.1
C 0 207 264251 1779.58 637 639 148.1
D 8 195 450648 2843.13 636 620 158.3
D 12 6 312228 1968.64 636 620 158.3
D 1 52 273583 1724.49 636 620 158.3

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