ASTROSAT CZTI

Data Quality Report

Orbit 20260606_A14_125T11_9000006582_level2

Creation date: 2026-07-28T03:12:23.072661
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_125T11_9000006582cztM0_level2.fits modeM0/AS1A14_125T11_9000006582cztM0_level2_quad_clean.evt
Size (bytes)4,574,715,8401,918,967,040
Size4.3 GB 1.8 GB
Events in quadrant A27,792,3985,506,709
Events in quadrant B25,704,0305,779,771
Events in quadrant C25,062,3004,730,046
Events in quadrant D22,642,8824,779,027

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110480
B0110440
C0110440
D0110440

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A011420360
B012428920
C018234510
D015372590

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06430
B06430
C06430
D06430

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A54451456011.028624%
B544495180123.308019%
C5444036988812.837549%
D544483407117.477001%

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 613289 544596 0 0 0.00% 0.00%
B 613289 544473 0 0 0.00% 0.00%
C 613289 543354 0 0 0.00% 0.00%
D 613289 544430 0 0 0.00% 0.00%

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 14 188 31548 10.21 7280 6721 2432.7
A 9 255 27880 8.7 7280 6721 2432.7
A 14 204 25890 7.88 7280 6721 2432.7
B 2 9 29996 15.05 6785 6419 1566.8
B 2 8 26893 13.07 6785 6419 1566.8
B 3 25 21341 9.52 6785 6419 1566.8
C 2 31 19940 6.02 6666 6059 2303.9
C 7 221 19834 5.98 6666 6059 2303.9
C 15 127 19624 5.89 6666 6059 2303.9
D 6 218 28206 10.31 6439 5697 2183.4
D 15 11 22404 7.65 6439 5697 2183.4
D 8 12 21903 7.42 6439 5697 2183.4

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