ASTROSAT CZTI

Data Quality Report

Orbit 15423

Creation date: 2024-06-27T17:08:18.777614
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/AS1T02_076T01_9000002274_15423cztM0_level2.evt modeM0/AS1T02_076T01_9000002274_15423cztM0_level2_quad_clean.evt
Size (bytes)1,445,993,280240,768,000
Size1.3 GB 229.6 MB
Events in quadrant A9,977,9641,509,739
Events in quadrant B9,312,9601,537,616
Events in quadrant C11,976,7701,499,049
Events in quadrant D11,250,3301,445,073

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0424145
B0398634
C0471004
D0464474

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0230
B0230
C0230
D0230

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A188784032.134760%
B188781650.874033%
C188787694.073525%
D188782821.493802%

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 21139 18883 179 179 0.85% 0.95%
B 21139 18883 7 7 0.03% 0.04%
C 21139 18883 482 482 2.28% 2.55%
D 21139 18883 91 91 0.43% 0.48%

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 14 238 1044213 2366.93 2200 2150 440.3
A 14 237 315840 712.51 2200 2150 440.3
A 9 143 74046 163.3 2200 2150 440.3
B 3 209 115152 268.18 2223 2170 421.3
B 4 142 99820 231.79 2223 2170 421.3
B 0 189 90511 209.69 2223 2170 421.3
C 3 233 3606226 7395.03 2117 2127 487.4
C 3 9 49341 96.88 2117 2127 487.4
C 7 247 34946 67.34 2117 2127 487.4
D 13 122 2082904 3955.25 2142 2074 526.1
D 5 222 651440 1234.32 2142 2074 526.1
D 2 33 134661 252.02 2142 2074 526.1

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