ASTROSAT CZTI

Data Quality Report

Orbit 11770

Creation date: 2024-06-27T16:18:04.460701
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/AS1A04_231T01_9000001740_11770cztM0_level2.evt modeM0/AS1A04_231T01_9000001740_11770cztM0_level2_quad_clean.evt
Size (bytes)692,913,600100,981,440
Size660.8 MB 96.3 MB
Events in quadrant A3,913,176669,091
Events in quadrant B6,869,992652,626
Events in quadrant C3,077,507675,368
Events in quadrant D6,665,001586,882

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160592
B0250461
C0138571
D0244621

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6790741.089838%
B67906699.852725%
C6790330.486009%
D6790111716.450663%

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 7536 6792 2 2 0.03% 0.03%
B 7536 6791 378 378 5.02% 5.57%
C 7536 6792 6 6 0.08% 0.09%
D 7536 6792 897 897 11.90% 13.21%

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 8 15 490529 3085.93 785 767 158.7
A 1 162 139174 872.09 785 767 158.7
A 1 178 80599 503.01 785 767 158.7
B 10 16 2026930 14008.49 768 747 144.6
B 15 204 1009058 6971.19 768 747 144.6
B 4 239 604387 4173.41 768 747 144.6
C 14 234 39728 215.15 776 780 181.0
C 12 4 5941 28.51 776 780 181.0
C 13 61 5669 27.01 776 780 181.0
D 1 52 3433740 19946.83 713 693 172.1
D 10 199 313082 1815.05 713 693 172.1
D 13 104 46027 263.4 713 693 172.1

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