ASTROSAT CZTI

Data Quality Report

Orbit 00891

Creation date: 2024-06-27T14:04:21.263450
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/AS1P01_161T03_9000000178_00891cztM0_level2.evt modeM0/AS1P01_161T03_9000000178_00891cztM0_level2_quad_clean.evt
Size (bytes)1,078,133,76076,596,480
Size1.0 GB 73.0 MB
Events in quadrant A7,326,734493,367
Events in quadrant B10,733,229443,922
Events in quadrant C7,311,412485,575
Events in quadrant D6,876,980470,986

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260610
B0363060
C0260370
D0247460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6088380.624179%
B608995215.634751%
C6089230.377730%
D6089370.607653%

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 6808 6089 205 205 3.01% 3.37%
B 6809 6090 1749 1749 25.69% 28.72%
C 6809 6090 237 237 3.48% 3.89%
D 6809 6090 148 148 2.17% 2.43%

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 79 7645 12.46 1908 1926 459.0
A 14 170 7275 11.65 1908 1926 459.0
A 3 111 5933 8.73 1908 1926 459.0
B 3 0 3076260 6938.65 1865 1880 443.1
B 8 38 455392 1023.54 1865 1880 443.1
B 5 249 31009 65.74 1865 1880 443.1
C 9 83 305146 612.42 1772 1833 495.3
C 15 241 29696 56.26 1772 1833 495.3
C 3 111 27655 52.14 1772 1833 495.3
D 1 4 220327 408.32 1763 1820 535.1
D 13 169 50487 90.94 1763 1820 535.1
D 10 157 13589 21.99 1763 1820 535.1

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