ASTROSAT CZTI

Data Quality Report

Orbit 16494

Creation date: 2024-06-27T17:23:31.897549
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/AS1A05_174T01_9000002440_16494cztM0_level2.evt modeM0/AS1A05_174T01_9000002440_16494cztM0_level2_quad_clean.evt
Size (bytes)1,289,252,160167,388,480
Size1.2 GB 159.6 MB
Events in quadrant A7,201,5271,053,158
Events in quadrant B6,957,1911,077,175
Events in quadrant C14,455,806992,732
Events in quadrant D9,494,606987,098

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02840
B02840
C02840
D02840

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0306614
B0293713
C0529393
D0375623

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A138913772.713987%
B138913632.613203%
C13891176312.691671%
D138919356.730977%

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 15457 13892 37 37 0.24% 0.27%
B 15457 13892 9 9 0.06% 0.06%
C 15457 13893 524 524 3.39% 3.77%
D 15457 13893 750 750 4.85% 5.40%

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 15 174 779628 2298.58 1671 1633 338.5
A 0 226 14464 37.91 1671 1633 338.5
A 3 137 12633 32.5 1671 1633 338.5
B 15 35 120328 364.81 1674 1629 325.4
B 3 209 59607 178.19 1674 1629 325.4
B 4 48 53952 160.81 1674 1629 325.4
C 3 233 8052324 21874.54 1571 1577 368.0
C 14 238 237561 641.19 1571 1577 368.0
C 7 247 26752 68.4 1571 1577 368.0
D 5 222 2885733 7395.9 1598 1549 390.0
D 12 218 226282 576.28 1598 1549 390.0
D 1 52 147195 373.48 1598 1549 390.0

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