ASTROSAT CZTI

Data Quality Report

Orbit 54525

Creation date: 2025-10-27T00:00:51.915000
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/AS1A14_127T09_9000006520_54525cztM0_level2.fits modeM0/AS1A14_127T09_9000006520_54525cztM0_level2_quad_clean.evt
Size (bytes)1,372,288,320257,950,080
Size1.3 GB 246.0 MB
Events in quadrant A9,951,7561,732,821
Events in quadrant B10,249,1031,810,896
Events in quadrant C14,541,7371,545,321
Events in quadrant D14,583,1911,409,843

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0426343
B0440763
C0565043
D0567383

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A190205182.723449%
B190218204.311025%
C1902114477.607381%
D1902018659.805468%

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 20400 19023 185 185 0.91% 0.97%
B 20401 19022 339 339 1.66% 1.78%
C 20401 19023 1092 1092 5.35% 5.74%
D 20400 19021 1424 1424 6.98% 7.49%

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 3 858268 1686.66 2084 2032 507.7
A 3 14 468633 919.14 2084 2032 507.7
A 4 3 283552 554.55 2084 2032 507.7
B 10 245 506080 1143.85 2042 1964 440.7
B 0 216 434900 982.34 2042 1964 440.7
B 10 247 287310 647.46 2042 1964 440.7
C 4 5 3582289 6605.97 1972 1959 542.0
C 13 3 1436178 2646.24 1972 1959 542.0
C 9 38 436170 801.15 1972 1959 542.0
D 12 3 3044882 5371.1 1969 1872 566.6
D 3 12 1062570 1872.2 1969 1872 566.6
D 6 239 958368 1688.28 1969 1872 566.6

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