ASTROSAT CZTI

Data Quality Report

Orbit 51881

Creation date: 2025-05-01T23:31:09.870344
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/AS1C09_011T05_9000006466_51881cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51881cztM0_level2_quad_clean.evt
Size (bytes)2,100,424,320234,460,800
Size2.0 GB 223.6 MB
Events in quadrant A16,051,4691,604,741
Events in quadrant B13,402,3831,815,480
Events in quadrant C14,300,0401,568,577
Events in quadrant D32,539,223805,826

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03820
B03820
C03820
D03820

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0606552
B0527592
C0557453
D01096362

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1890713186.970963%
B189089725.140681%
C1890711285.966044%
D18907977851.716296%

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 19897 18909 901 901 4.53% 4.76%
B 19898 18910 483 483 2.43% 2.55%
C 19897 18909 913 913 4.59% 4.83%
D 19897 18908 7549 7549 37.94% 39.92%

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 11 3 1554111 3163.47 1961 1913 490.7
A 12 3 1016173 2067.12 1961 1913 490.7
A 4 175 936667 1905.08 1961 1913 490.7
B 4 170 1632268 3890.39 1969 1900 419.1
B 10 44 1214068 2892.48 1969 1900 419.1
B 1 223 723134 1721.01 1969 1900 419.1
C 15 192 1296274 2457.52 1921 1904 526.7
C 15 147 946962 1794.31 1921 1904 526.7
C 15 178 775344 1468.47 1921 1904 526.7
D 11 129 12333336 30483.96 1427 1369 404.5
D 12 17 6498129 16059.64 1427 1369 404.5
D 6 42 1700721 4200.71 1427 1369 404.5

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