ASTROSAT CZTI

Data Quality Report

Orbit 01179

Creation date: 2024-06-27T14:08:44.542209
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/AS1P01_997T02_9000000218_01179cztM0_level2.evt modeM0/AS1P01_997T02_9000000218_01179cztM0_level2_quad_clean.evt
Size (bytes)1,176,298,560108,783,360
Size1.1 GB 103.7 MB
Events in quadrant A8,663,439710,646
Events in quadrant B9,290,436707,872
Events in quadrant C8,811,443686,626
Events in quadrant D8,373,433679,187

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0309373
B0327892
C0313472
D0301432

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A732690.122850%
B7326380.518701%
C732670.095550%
D7326210.286650%

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 7861 7327 177 177 2.25% 2.42%
B 7861 7327 336 336 4.27% 4.59%
C 7861 7327 176 176 2.24% 2.40%
D 7861 7327 228 228 2.90% 3.11%

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 0 175 43243 76.34 2240 2250 537.0
A 11 79 9447 13.4 2240 2250 537.0
A 8 14 7592 9.95 2240 2250 537.0
B 5 191 242778 436.87 2329 2341 550.4
B 6 53 56716 98.8 2329 2341 550.4
B 15 22 51296 88.95 2329 2341 550.4
C 15 241 316767 522.38 2156 2235 602.1
C 3 111 27331 41.68 2156 2235 602.1
C 3 79 22712 34.01 2156 2235 602.1
D 1 239 344416 532.92 2082 2155 642.2
D 14 50 53140 79.39 2082 2155 642.2
D 2 152 32516 47.27 2082 2155 642.2

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