ASTROSAT CZTI

Data Quality Report

Orbit 51779

Creation date: 2025-04-25T02:28:31.431153
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/AS1A13_090T01_9000006464_51779cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51779cztM0_level2_quad_clean.evt
Size (bytes)1,599,120,000209,304,000
Size1.5 GB 199.6 MB
Events in quadrant A11,644,2141,437,124
Events in quadrant B10,753,8751,532,661
Events in quadrant C13,233,3671,363,241
Events in quadrant D22,337,753907,477

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03200
B03200
C03200
D03200

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0455501
B0429041
C0501781
D0773371

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A158836053.809104%
B158848465.326114%
C1588410096.352304%
D15884536133.750944%

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 16158 15884 331 331 2.05% 2.08%
B 16159 15885 431 431 2.67% 2.71%
C 16159 15885 637 637 3.94% 4.01%
D 16159 15885 4632 4632 28.67% 29.16%

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 12 3 1363735 3232.49 1711 1668 421.4
A 3 14 587063 1389.27 1711 1668 421.4
A 4 175 548207 1297.06 1711 1668 421.4
B 4 206 1321150 3642.94 1692 1633 362.2
B 10 44 956173 2635.3 1692 1633 362.2
B 4 174 477615 1314.1 1692 1633 362.2
C 3 242 2316316 5172.96 1653 1643 447.5
C 15 218 808725 1803.71 1653 1643 447.5
C 9 38 692670 1544.35 1653 1643 447.5
D 11 129 12881943 33353.48 1384 1336 386.2
D 7 60 1833677 4744.72 1384 1336 386.2
D 7 159 387927 1001.05 1384 1336 386.2

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